diff --git a/Gopkg.lock b/Gopkg.lock
index cd8226d284c46..f2b0b627a52b1 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -329,7 +329,7 @@
 
 [[projects]]
   digest = "1:4b96ce0f151b10c52b1d6876c179e9a6d2329f98939c4cf8148daaf27f981413"
-  name = "github.com/pkg/errors"
+  name = "github.com/pingcap/errors"
   packages = ["."]
   pruneopts = "NUT"
   revision = "1176802fff62540cc87d289bd40c52a2d6b2ea16"
@@ -577,7 +577,7 @@
     "github.com/pingcap/tidb-tools/tidb-binlog/pump_client",
     "github.com/pingcap/tipb/go-binlog",
     "github.com/pingcap/tipb/go-tipb",
-    "github.com/pkg/errors",
+    "github.com/pingcap/errors",
     "github.com/prometheus/client_golang/prometheus",
     "github.com/prometheus/client_golang/prometheus/push",
     "github.com/sirupsen/logrus",
diff --git a/Gopkg.toml b/Gopkg.toml
index 57a9061159479..807b2fee97d49 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -94,7 +94,7 @@ required = ["github.com/golang/protobuf/jsonpb"]
   name = "github.com/pingcap/tipb"
 
 [[constraint]]
-  name = "github.com/pkg/errors"
+  name = "github.com/pingcap/errors"
   version = "0.11.0"
   source = "https://github.com/pingcap/errors.git"
 
diff --git a/cmd/benchfilesort/main.go b/cmd/benchfilesort/main.go
index 3116638efb902..08c16353a58fd 100644
--- a/cmd/benchfilesort/main.go
+++ b/cmd/benchfilesort/main.go
@@ -24,13 +24,13 @@ import (
 	"runtime/pprof"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tidb/util/filesort"
 	"github.com/pingcap/tidb/util/logutil"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/cmd/benchkv/main.go b/cmd/benchkv/main.go
index 9210170dba708..d6589591a6724 100644
--- a/cmd/benchkv/main.go
+++ b/cmd/benchkv/main.go
@@ -24,10 +24,10 @@ import (
 
 	_ "github.com/go-sql-driver/mysql"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/store/tikv"
-	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
diff --git a/cmd/benchraw/main.go b/cmd/benchraw/main.go
index f1c6f30b40279..b517b14a3a299 100644
--- a/cmd/benchraw/main.go
+++ b/cmd/benchraw/main.go
@@ -22,10 +22,10 @@ import (
 	"sync"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/config"
 	"github.com/pingcap/tidb/store/tikv"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/cmd/explaintest/main.go b/cmd/explaintest/main.go
index cc3e6dd9b6e61..d3650f8a05eb1 100644
--- a/cmd/explaintest/main.go
+++ b/cmd/explaintest/main.go
@@ -26,12 +26,12 @@ import (
 
 	"flag"
 	"github.com/go-sql-driver/mysql"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/tidb/session"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/util/logutil"
 	"github.com/pingcap/tidb/util/mock"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"time"
 )
diff --git a/cmd/importer/config.go b/cmd/importer/config.go
index 62f6eb74ba3a5..34d13fc95f8d9 100644
--- a/cmd/importer/config.go
+++ b/cmd/importer/config.go
@@ -18,7 +18,7 @@ import (
 	"fmt"
 
 	"github.com/BurntSushi/toml"
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 )
 
 // NewConfig creates a new config.
diff --git a/cmd/importer/db.go b/cmd/importer/db.go
index 92bf182828ed0..71d498d83d933 100644
--- a/cmd/importer/db.go
+++ b/cmd/importer/db.go
@@ -21,8 +21,8 @@ import (
 	"strings"
 
 	_ "github.com/go-sql-driver/mysql"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/cmd/importer/job.go b/cmd/importer/job.go
index 50d38fd400112..07277d38474e5 100644
--- a/cmd/importer/job.go
+++ b/cmd/importer/job.go
@@ -18,7 +18,7 @@ import (
 	"fmt"
 	"time"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/cmd/importer/main.go b/cmd/importer/main.go
index 923fd5d655512..7abaaf1ce59f1 100644
--- a/cmd/importer/main.go
+++ b/cmd/importer/main.go
@@ -17,7 +17,7 @@ import (
 	"flag"
 	"os"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/cmd/importer/parser.go b/cmd/importer/parser.go
index b953403698d88..3bc8e49dd64ac 100644
--- a/cmd/importer/parser.go
+++ b/cmd/importer/parser.go
@@ -18,6 +18,7 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
@@ -25,7 +26,6 @@ import (
 	_ "github.com/pingcap/tidb/planner/core"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/mock"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/cmd/importer/stats.go b/cmd/importer/stats.go
index 5ef2a543805e3..c1f4896bb776f 100644
--- a/cmd/importer/stats.go
+++ b/cmd/importer/stats.go
@@ -19,12 +19,12 @@ import (
 	"math/rand"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	stats "github.com/pingcap/tidb/statistics"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/codec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/config/config.go b/config/config.go
index 7f19f634397a4..0a58f7936f397 100644
--- a/config/config.go
+++ b/config/config.go
@@ -20,8 +20,8 @@ import (
 	"time"
 
 	"github.com/BurntSushi/toml"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/util/logutil"
-	"github.com/pkg/errors"
 	tracing "github.com/uber/jaeger-client-go/config"
 )
 
diff --git a/ddl/column.go b/ddl/column.go
index e28ff4b18bc12..b25b12b51efaf 100644
--- a/ddl/column.go
+++ b/ddl/column.go
@@ -16,6 +16,7 @@ package ddl
 import (
 	"fmt"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -24,7 +25,6 @@ import (
 	"github.com/pingcap/tidb/meta"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/ddl/column_change_test.go b/ddl/column_change_test.go
index 6655067a3f9c8..fc0acf34b87d5 100644
--- a/ddl/column_change_test.go
+++ b/ddl/column_change_test.go
@@ -19,6 +19,7 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/kv"
@@ -30,7 +31,6 @@ import (
 	"github.com/pingcap/tidb/util/mock"
 	"github.com/pingcap/tidb/util/testleak"
 	"github.com/pingcap/tidb/util/testutil"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/ddl/column_test.go b/ddl/column_test.go
index 1859f1a696d73..91a2af5062cf9 100644
--- a/ddl/column_test.go
+++ b/ddl/column_test.go
@@ -18,6 +18,7 @@ import (
 	"sync"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
@@ -30,7 +31,6 @@ import (
 	"github.com/pingcap/tidb/tablecodec"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/ddl/db_change_test.go b/ddl/db_change_test.go
index 1df966848094a..5ae512e8a8552 100644
--- a/ddl/db_change_test.go
+++ b/ddl/db_change_test.go
@@ -21,6 +21,7 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
@@ -37,7 +38,6 @@ import (
 	"github.com/pingcap/tidb/util/sqlexec"
 	"github.com/pingcap/tidb/util/testkit"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/ddl/db_integration_test.go b/ddl/db_integration_test.go
index 2698a82b5256c..effcb92e2d832 100644
--- a/ddl/db_integration_test.go
+++ b/ddl/db_integration_test.go
@@ -17,6 +17,7 @@ import (
 	"fmt"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/ddl"
 	"github.com/pingcap/tidb/domain"
@@ -30,7 +31,6 @@ import (
 	"github.com/pingcap/tidb/util/mock"
 	"github.com/pingcap/tidb/util/testkit"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 )
 
 var _ = Suite(&testIntegrationSuite{})
diff --git a/ddl/db_test.go b/ddl/db_test.go
index df201fdc12abc..c55314a5dc139 100644
--- a/ddl/db_test.go
+++ b/ddl/db_test.go
@@ -24,6 +24,7 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -48,7 +49,6 @@ import (
 	"github.com/pingcap/tidb/util/testkit"
 	"github.com/pingcap/tidb/util/testleak"
 	"github.com/pingcap/tidb/util/testutil"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/ddl/ddl.go b/ddl/ddl.go
index b54b4e976cfa9..030268e74feef 100644
--- a/ddl/ddl.go
+++ b/ddl/ddl.go
@@ -24,6 +24,7 @@ import (
 
 	"github.com/coreos/etcd/clientv3"
 	"github.com/ngaut/pools"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -40,7 +41,6 @@ import (
 	"github.com/pingcap/tidb/sessionctx/variable"
 	"github.com/pingcap/tidb/table"
 	tidbutil "github.com/pingcap/tidb/util"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"github.com/twinj/uuid"
 	"golang.org/x/net/context"
diff --git a/ddl/ddl_api.go b/ddl/ddl_api.go
index 2d9f6b2393e9e..5eb8dbbce956b 100644
--- a/ddl/ddl_api.go
+++ b/ddl/ddl_api.go
@@ -24,6 +24,7 @@ import (
 	"time"
 
 	"github.com/cznic/mathutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/model"
@@ -35,7 +36,6 @@ import (
 	"github.com/pingcap/tidb/sessionctx/variable"
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/types"
-	"github.com/pkg/errors"
 )
 
 func (d *ddl) CreateSchema(ctx sessionctx.Context, schema model.CIStr, charsetInfo *ast.CharsetOpt) (err error) {
diff --git a/ddl/ddl_worker.go b/ddl/ddl_worker.go
index fd6ed28300fc1..5bf70ed2f3d9f 100644
--- a/ddl/ddl_worker.go
+++ b/ddl/ddl_worker.go
@@ -20,6 +20,7 @@ import (
 	"time"
 
 	"github.com/ngaut/pools"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/kv"
@@ -27,7 +28,6 @@ import (
 	"github.com/pingcap/tidb/metrics"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/sessionctx/binloginfo"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/ddl/ddl_worker_test.go b/ddl/ddl_worker_test.go
index dbba30142bea0..fb75ca744e223 100644
--- a/ddl/ddl_worker_test.go
+++ b/ddl/ddl_worker_test.go
@@ -18,6 +18,7 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -29,7 +30,6 @@ import (
 	"github.com/pingcap/tidb/util/mock"
 	"github.com/pingcap/tidb/util/sqlexec"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/ddl/delete_range.go b/ddl/delete_range.go
index 25a4512d6beeb..afe30274ee33a 100644
--- a/ddl/delete_range.go
+++ b/ddl/delete_range.go
@@ -20,6 +20,7 @@ import (
 	"math"
 	"sync"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/ddl/util"
@@ -27,7 +28,6 @@ import (
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/tablecodec"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/ddl/foreign_key.go b/ddl/foreign_key.go
index d6c3de7d75c1e..b5f9e4fb90185 100644
--- a/ddl/foreign_key.go
+++ b/ddl/foreign_key.go
@@ -14,10 +14,10 @@
 package ddl
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/infoschema"
 	"github.com/pingcap/tidb/meta"
-	"github.com/pkg/errors"
 )
 
 func onCreateForeignKey(t *meta.Meta, job *model.Job) (ver int64, _ error) {
diff --git a/ddl/foreign_key_test.go b/ddl/foreign_key_test.go
index 386b62e604e4e..2bb7eaa2c7cf0 100644
--- a/ddl/foreign_key_test.go
+++ b/ddl/foreign_key_test.go
@@ -18,13 +18,13 @@ import (
 	"sync"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/ddl/generated_column.go b/ddl/generated_column.go
index 3120b2d907258..0e752c0df525b 100644
--- a/ddl/generated_column.go
+++ b/ddl/generated_column.go
@@ -14,9 +14,9 @@
 package ddl
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/tidb/table"
-	"github.com/pkg/errors"
 )
 
 // columnGenerationInDDL is a struct for validating generated columns in DDL.
diff --git a/ddl/index.go b/ddl/index.go
index 2e92bf619c05e..b8454dff94e9e 100644
--- a/ddl/index.go
+++ b/ddl/index.go
@@ -19,6 +19,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -37,7 +38,6 @@ import (
 	"github.com/pingcap/tidb/util"
 	"github.com/pingcap/tidb/util/rowDecoder"
 	"github.com/pingcap/tidb/util/timeutil"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/ddl/index_change_test.go b/ddl/index_change_test.go
index 518b0847471c7..0681c54248f11 100644
--- a/ddl/index_change_test.go
+++ b/ddl/index_change_test.go
@@ -15,6 +15,7 @@ package ddl
 
 import (
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/kv"
@@ -23,7 +24,6 @@ import (
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/ddl/mock.go b/ddl/mock.go
index 6060eb9bba5bb..16d2d64d1b44d 100644
--- a/ddl/mock.go
+++ b/ddl/mock.go
@@ -18,10 +18,10 @@ import (
 	"time"
 
 	"github.com/coreos/etcd/clientv3"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/sessionctx"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/ddl/partition.go b/ddl/partition.go
index 18058ed83d02e..f61774f5ebfc7 100644
--- a/ddl/partition.go
+++ b/ddl/partition.go
@@ -19,6 +19,7 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -29,7 +30,6 @@ import (
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 const (
diff --git a/ddl/reorg.go b/ddl/reorg.go
index 52b6009d927f2..a793e0c402c71 100644
--- a/ddl/reorg.go
+++ b/ddl/reorg.go
@@ -18,6 +18,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
@@ -32,7 +33,6 @@ import (
 	"github.com/pingcap/tidb/util/mock"
 	"github.com/pingcap/tidb/util/ranger"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/ddl/schema.go b/ddl/schema.go
index 0c5cc0e82e21e..07c2e59df4aa3 100644
--- a/ddl/schema.go
+++ b/ddl/schema.go
@@ -14,10 +14,10 @@
 package ddl
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/infoschema"
 	"github.com/pingcap/tidb/meta"
-	"github.com/pkg/errors"
 )
 
 func onCreateSchema(t *meta.Meta, job *model.Job) (ver int64, _ error) {
diff --git a/ddl/session_pool.go b/ddl/session_pool.go
index 7710355ce794b..cd6f5be9bdaa9 100644
--- a/ddl/session_pool.go
+++ b/ddl/session_pool.go
@@ -17,10 +17,10 @@ import (
 	"sync"
 
 	"github.com/ngaut/pools"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/util/mock"
-	"github.com/pkg/errors"
 )
 
 // sessionPool is used to new session.
diff --git a/ddl/stat.go b/ddl/stat.go
index e129c22eb758b..aaaa8d3c53b0d 100644
--- a/ddl/stat.go
+++ b/ddl/stat.go
@@ -14,10 +14,10 @@
 package ddl
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/sessionctx/variable"
 	"github.com/pingcap/tidb/util/admin"
-	"github.com/pkg/errors"
 )
 
 var (
diff --git a/ddl/syncer.go b/ddl/syncer.go
index 8f822dff87427..3b4d2bd366dfe 100644
--- a/ddl/syncer.go
+++ b/ddl/syncer.go
@@ -24,9 +24,9 @@ import (
 
 	"github.com/coreos/etcd/clientv3"
 	"github.com/coreos/etcd/clientv3/concurrency"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/metrics"
 	"github.com/pingcap/tidb/owner"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/ddl/table.go b/ddl/table.go
index c6c95fc6707a8..2e8390854143d 100644
--- a/ddl/table.go
+++ b/ddl/table.go
@@ -18,6 +18,7 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/ddl/util"
 	"github.com/pingcap/tidb/infoschema"
@@ -26,7 +27,6 @@ import (
 	"github.com/pingcap/tidb/meta/autoid"
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/tablecodec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/ddl/table_test.go b/ddl/table_test.go
index ad39b3abd9f41..b594b1353233a 100644
--- a/ddl/table_test.go
+++ b/ddl/table_test.go
@@ -17,6 +17,7 @@ import (
 	"fmt"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/kv"
@@ -26,7 +27,6 @@ import (
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/ddl/util/util.go b/ddl/util/util.go
index c9a3c42a65633..9ec18dbe970a6 100644
--- a/ddl/util/util.go
+++ b/ddl/util/util.go
@@ -17,12 +17,12 @@ import (
 	"encoding/hex"
 	"fmt"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/distsql/distsql.go b/distsql/distsql.go
index b681fbc816bdf..2abf907242141 100644
--- a/distsql/distsql.go
+++ b/distsql/distsql.go
@@ -14,12 +14,12 @@
 package distsql
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/metrics"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/statistics"
 	"github.com/pingcap/tidb/types"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/distsql/distsql_test.go b/distsql/distsql_test.go
index 8d20dbd89f755..3411c875992c6 100644
--- a/distsql/distsql_test.go
+++ b/distsql/distsql_test.go
@@ -19,6 +19,7 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/kv"
@@ -30,7 +31,6 @@ import (
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tidb/util/execdetails"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/distsql/request_builder.go b/distsql/request_builder.go
index 6dd12c6f20c22..f66a83a5721d3 100644
--- a/distsql/request_builder.go
+++ b/distsql/request_builder.go
@@ -16,6 +16,7 @@ package distsql
 import (
 	"math"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
@@ -26,7 +27,6 @@ import (
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tidb/util/ranger"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 )
 
 // RequestBuilder is used to build a "kv.Request".
diff --git a/distsql/select_result.go b/distsql/select_result.go
index 9558f9e680ccc..4b77eff02a800 100644
--- a/distsql/select_result.go
+++ b/distsql/select_result.go
@@ -16,6 +16,7 @@ package distsql
 import (
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/metrics"
@@ -25,7 +26,6 @@ import (
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/distsql/stream.go b/distsql/stream.go
index 0f651a53dc721..ea2e5417205b7 100644
--- a/distsql/stream.go
+++ b/distsql/stream.go
@@ -14,6 +14,7 @@
 package distsql
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/metrics"
@@ -23,7 +24,6 @@ import (
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/domain/domain.go b/domain/domain.go
index c59012a0b69e5..8e95b39c71937 100644
--- a/domain/domain.go
+++ b/domain/domain.go
@@ -25,6 +25,7 @@ import (
 	"github.com/grpc-ecosystem/go-grpc-prometheus"
 	"github.com/ngaut/pools"
 	"github.com/ngaut/sync2"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/terror"
@@ -40,7 +41,6 @@ import (
 	"github.com/pingcap/tidb/sessionctx/variable"
 	"github.com/pingcap/tidb/statistics"
 	"github.com/pingcap/tidb/util"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 	"google.golang.org/grpc"
diff --git a/domain/domain_test.go b/domain/domain_test.go
index c516632a99487..be1f18c8aec17 100644
--- a/domain/domain_test.go
+++ b/domain/domain_test.go
@@ -19,12 +19,12 @@ import (
 
 	"github.com/ngaut/pools"
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/store/mockstore"
 	"github.com/pingcap/tidb/util/mock"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 )
 
 func TestT(t *testing.T) {
diff --git a/domain/info.go b/domain/info.go
index 226b395eed0c4..84b00f8f24ecf 100644
--- a/domain/info.go
+++ b/domain/info.go
@@ -20,13 +20,13 @@ import (
 
 	"github.com/coreos/etcd/clientv3"
 	"github.com/coreos/etcd/clientv3/concurrency"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/config"
 	"github.com/pingcap/tidb/ddl"
 	"github.com/pingcap/tidb/owner"
 	"github.com/pingcap/tidb/util/hack"
 	"github.com/pingcap/tidb/util/printer"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/executor/adapter.go b/executor/adapter.go
index 44f6d5eaed6b7..17c12a65cf37f 100644
--- a/executor/adapter.go
+++ b/executor/adapter.go
@@ -20,6 +20,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -37,7 +38,6 @@ import (
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/logutil"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/executor/admin.go b/executor/admin.go
index d7dd92d6cc36c..e62ec605996d1 100644
--- a/executor/admin.go
+++ b/executor/admin.go
@@ -16,6 +16,7 @@ package executor
 import (
 	"math"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/terror"
@@ -32,7 +33,6 @@ import (
 	"github.com/pingcap/tidb/util/ranger"
 	"github.com/pingcap/tidb/util/timeutil"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/executor/aggfuncs/builder.go b/executor/aggfuncs/builder.go
index 097c90affa782..0f2162d567b2c 100644
--- a/executor/aggfuncs/builder.go
+++ b/executor/aggfuncs/builder.go
@@ -17,6 +17,7 @@ import (
 	"fmt"
 	"strconv"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/expression"
@@ -25,7 +26,6 @@ import (
 	"github.com/pingcap/tidb/sessionctx/variable"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 // Build is used to build a specific AggFunc implementation according to the
diff --git a/executor/aggfuncs/func_avg.go b/executor/aggfuncs/func_avg.go
index b31b0f96ed69a..b599d4f3e0779 100644
--- a/executor/aggfuncs/func_avg.go
+++ b/executor/aggfuncs/func_avg.go
@@ -15,12 +15,12 @@ package aggfuncs
 
 import (
 	"github.com/cznic/mathutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/set"
-	"github.com/pkg/errors"
 )
 
 // All the following avg function implementations return the decimal result,
diff --git a/executor/aggfuncs/func_bitfuncs.go b/executor/aggfuncs/func_bitfuncs.go
index 3379a9b695ff5..2418df4053c05 100644
--- a/executor/aggfuncs/func_bitfuncs.go
+++ b/executor/aggfuncs/func_bitfuncs.go
@@ -16,9 +16,9 @@ package aggfuncs
 import (
 	"math"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 type baseBitAggFunc struct {
diff --git a/executor/aggfuncs/func_count.go b/executor/aggfuncs/func_count.go
index ee57b1be64665..74cfb6863173e 100644
--- a/executor/aggfuncs/func_count.go
+++ b/executor/aggfuncs/func_count.go
@@ -4,13 +4,13 @@ import (
 	"encoding/binary"
 	"unsafe"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/set"
-	"github.com/pkg/errors"
 )
 
 type baseCount struct {
diff --git a/executor/aggfuncs/func_first_row.go b/executor/aggfuncs/func_first_row.go
index 0da037dc1e7bd..25932d0802906 100644
--- a/executor/aggfuncs/func_first_row.go
+++ b/executor/aggfuncs/func_first_row.go
@@ -14,12 +14,12 @@
 package aggfuncs
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/stringutil"
-	"github.com/pkg/errors"
 )
 
 type basePartialResult4FirstRow struct {
diff --git a/executor/aggfuncs/func_group_concat.go b/executor/aggfuncs/func_group_concat.go
index ac4a29727e693..40ed32bce0093 100644
--- a/executor/aggfuncs/func_group_concat.go
+++ b/executor/aggfuncs/func_group_concat.go
@@ -18,11 +18,11 @@ import (
 	"sync/atomic"
 
 	"github.com/cznic/mathutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/set"
-	"github.com/pkg/errors"
 )
 
 type baseGroupConcat4String struct {
diff --git a/executor/aggfuncs/func_max_min.go b/executor/aggfuncs/func_max_min.go
index 3bceaa346e683..a828a40def2d8 100644
--- a/executor/aggfuncs/func_max_min.go
+++ b/executor/aggfuncs/func_max_min.go
@@ -14,12 +14,12 @@
 package aggfuncs
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/stringutil"
-	"github.com/pkg/errors"
 )
 
 type partialResult4MaxMinInt struct {
diff --git a/executor/aggfuncs/func_sum.go b/executor/aggfuncs/func_sum.go
index e38fbc415b9c8..c2935231d5dfb 100644
--- a/executor/aggfuncs/func_sum.go
+++ b/executor/aggfuncs/func_sum.go
@@ -14,11 +14,11 @@
 package aggfuncs
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/set"
-	"github.com/pkg/errors"
 )
 
 type partialResult4SumFloat64 struct {
diff --git a/executor/aggregate.go b/executor/aggregate.go
index a72ad4f0d37a2..4063d9263a8e1 100644
--- a/executor/aggregate.go
+++ b/executor/aggregate.go
@@ -17,6 +17,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/executor/aggfuncs"
 	"github.com/pingcap/tidb/expression"
@@ -26,7 +27,6 @@ import (
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tidb/util/set"
-	"github.com/pkg/errors"
 	"github.com/spaolacci/murmur3"
 	"golang.org/x/net/context"
 )
diff --git a/executor/analyze.go b/executor/analyze.go
index 85fa0987cfe88..1d3be14c5cecd 100644
--- a/executor/analyze.go
+++ b/executor/analyze.go
@@ -17,6 +17,7 @@ import (
 	"runtime"
 	"strconv"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/distsql"
@@ -29,7 +30,6 @@ import (
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/ranger"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/executor/batch_checker.go b/executor/batch_checker.go
index 558e25884a55e..eeb4970ff0bbf 100644
--- a/executor/batch_checker.go
+++ b/executor/batch_checker.go
@@ -14,6 +14,7 @@
 package executor
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/sessionctx"
@@ -21,7 +22,6 @@ import (
 	"github.com/pingcap/tidb/table/tables"
 	"github.com/pingcap/tidb/tablecodec"
 	"github.com/pingcap/tidb/types"
-	"github.com/pkg/errors"
 )
 
 type keyValue struct {
diff --git a/executor/builder.go b/executor/builder.go
index fed4e0771654f..274a69dcb3e8c 100644
--- a/executor/builder.go
+++ b/executor/builder.go
@@ -24,6 +24,7 @@ import (
 
 	"github.com/cznic/mathutil"
 	"github.com/cznic/sortutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -47,7 +48,6 @@ import (
 	"github.com/pingcap/tidb/util/ranger"
 	"github.com/pingcap/tidb/util/timeutil"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/checksum.go b/executor/checksum.go
index e9d6832096339..e0570d37f6c9b 100644
--- a/executor/checksum.go
+++ b/executor/checksum.go
@@ -16,6 +16,7 @@ package executor
 import (
 	"strconv"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/distsql"
 	"github.com/pingcap/tidb/kv"
@@ -24,7 +25,6 @@ import (
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/ranger"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/executor/compiler.go b/executor/compiler.go
index 778a555e74194..a47f18aa14969 100644
--- a/executor/compiler.go
+++ b/executor/compiler.go
@@ -17,6 +17,7 @@ import (
 	"fmt"
 
 	"github.com/opentracing/opentracing-go"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/tidb/config"
 	"github.com/pingcap/tidb/infoschema"
@@ -24,7 +25,6 @@ import (
 	"github.com/pingcap/tidb/planner"
 	plannercore "github.com/pingcap/tidb/planner/core"
 	"github.com/pingcap/tidb/sessionctx"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/executor/ddl.go b/executor/ddl.go
index ba7e9c02390c0..d70b73ad9a7e6 100644
--- a/executor/ddl.go
+++ b/executor/ddl.go
@@ -17,6 +17,7 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -27,7 +28,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/executor/delete.go b/executor/delete.go
index 991e2f2817ed5..00ebebefa2ac5 100644
--- a/executor/delete.go
+++ b/executor/delete.go
@@ -14,13 +14,13 @@
 package executor
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/distsql.go b/executor/distsql.go
index 89caee248ecf1..9b8c5600d3f8e 100644
--- a/executor/distsql.go
+++ b/executor/distsql.go
@@ -22,6 +22,7 @@ import (
 	"time"
 	"unsafe"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
@@ -38,7 +39,6 @@ import (
 	"github.com/pingcap/tidb/util/memory"
 	"github.com/pingcap/tidb/util/ranger"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/executor/executor.go b/executor/executor.go
index 83381ed6b5046..11dd342b4a100 100644
--- a/executor/executor.go
+++ b/executor/executor.go
@@ -21,6 +21,7 @@ import (
 	"time"
 
 	"github.com/cznic/mathutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -41,7 +42,6 @@ import (
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/execdetails"
 	"github.com/pingcap/tidb/util/memory"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/executor/executor_test.go b/executor/executor_test.go
index 5c88fcc5ef6c1..692d708010409 100644
--- a/executor/executor_test.go
+++ b/executor/executor_test.go
@@ -28,6 +28,7 @@ import (
 	gofail "github.com/etcd-io/gofail/runtime"
 	"github.com/golang/protobuf/proto"
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	pb "github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/parser"
 	"github.com/pingcap/parser/model"
@@ -62,7 +63,6 @@ import (
 	"github.com/pingcap/tidb/util/testutil"
 	"github.com/pingcap/tidb/util/timeutil"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/grant.go b/executor/grant.go
index 2886e1de36791..4225043e21fd0 100644
--- a/executor/grant.go
+++ b/executor/grant.go
@@ -17,6 +17,7 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -26,7 +27,6 @@ import (
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/index_lookup_join.go b/executor/index_lookup_join.go
index 7fcb4bb08bac5..1d809b79776fb 100644
--- a/executor/index_lookup_join.go
+++ b/executor/index_lookup_join.go
@@ -21,6 +21,7 @@ import (
 	"time"
 	"unsafe"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/expression"
@@ -32,7 +33,6 @@ import (
 	"github.com/pingcap/tidb/util/memory"
 	"github.com/pingcap/tidb/util/mvmap"
 	"github.com/pingcap/tidb/util/ranger"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/executor/insert.go b/executor/insert.go
index 43a4dbded119b..4bf2fb5fa9bd1 100644
--- a/executor/insert.go
+++ b/executor/insert.go
@@ -14,6 +14,7 @@
 package executor
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/kv"
@@ -21,7 +22,6 @@ import (
 	"github.com/pingcap/tidb/tablecodec"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/executor/insert_common.go b/executor/insert_common.go
index 59655a57af6b1..fc935a1030f64 100644
--- a/executor/insert_common.go
+++ b/executor/insert_common.go
@@ -16,6 +16,7 @@ package executor
 import (
 	"fmt"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -24,7 +25,6 @@ import (
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/executor/join.go b/executor/join.go
index c62d73ab65e95..ef97c69420fae 100644
--- a/executor/join.go
+++ b/executor/join.go
@@ -20,6 +20,7 @@ import (
 	"time"
 	"unsafe"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/expression"
 	plannercore "github.com/pingcap/tidb/planner/core"
@@ -29,7 +30,6 @@ import (
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tidb/util/memory"
 	"github.com/pingcap/tidb/util/mvmap"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/joiner.go b/executor/joiner.go
index 3494a69eff842..5423acdca86f8 100644
--- a/executor/joiner.go
+++ b/executor/joiner.go
@@ -14,12 +14,12 @@
 package executor
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/expression"
 	plannercore "github.com/pingcap/tidb/planner/core"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 var (
diff --git a/executor/load_data.go b/executor/load_data.go
index 6ab6c7aa5050c..258b5cfbd233d 100644
--- a/executor/load_data.go
+++ b/executor/load_data.go
@@ -18,12 +18,12 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/executor/load_stats.go b/executor/load_stats.go
index 968d3b10e0601..7a5894745d495 100644
--- a/executor/load_stats.go
+++ b/executor/load_stats.go
@@ -16,11 +16,11 @@ package executor
 import (
 	"encoding/json"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/domain"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/statistics"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/merge_join.go b/executor/merge_join.go
index 4bbfeaac26e0d..7939d128d9948 100644
--- a/executor/merge_join.go
+++ b/executor/merge_join.go
@@ -16,11 +16,11 @@ package executor
 import (
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/memory"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/point_get.go b/executor/point_get.go
index e74c29e8aafbb..cd32718f19e6f 100644
--- a/executor/point_get.go
+++ b/executor/point_get.go
@@ -14,6 +14,7 @@
 package executor
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/expression"
@@ -26,7 +27,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/codec"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/prepared.go b/executor/prepared.go
index 3538949f3822f..d2ad884d0e621 100644
--- a/executor/prepared.go
+++ b/executor/prepared.go
@@ -17,6 +17,7 @@ import (
 	"math"
 	"sort"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/tidb/expression"
@@ -29,7 +30,6 @@ import (
 	"github.com/pingcap/tidb/types/parser_driver"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/prepared_test.go b/executor/prepared_test.go
index 477c0e704bf2b..808cbee20a577 100644
--- a/executor/prepared_test.go
+++ b/executor/prepared_test.go
@@ -18,11 +18,11 @@ import (
 	"strings"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/executor"
 	plannercore "github.com/pingcap/tidb/planner/core"
 	"github.com/pingcap/tidb/util/testkit"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/projection.go b/executor/projection.go
index dce2709f1271b..42890fb97f01e 100644
--- a/executor/projection.go
+++ b/executor/projection.go
@@ -16,10 +16,10 @@ package executor
 import (
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/replace.go b/executor/replace.go
index bb06f2fec0455..5aa983a6e0ebb 100644
--- a/executor/replace.go
+++ b/executor/replace.go
@@ -14,11 +14,11 @@
 package executor
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/table/tables"
 	"github.com/pingcap/tidb/tablecodec"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/executor/revoke.go b/executor/revoke.go
index 35992f885615f..f541571156eff 100644
--- a/executor/revoke.go
+++ b/executor/revoke.go
@@ -16,6 +16,7 @@ package executor
 import (
 	"fmt"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/domain"
@@ -24,7 +25,6 @@ import (
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/set.go b/executor/set.go
index f7f7853c8717c..9ed9b5424413c 100644
--- a/executor/set.go
+++ b/executor/set.go
@@ -18,6 +18,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/terror"
@@ -28,7 +29,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/executor/show.go b/executor/show.go
index e1e2bd371ae00..e7d4a64d65dde 100644
--- a/executor/show.go
+++ b/executor/show.go
@@ -22,6 +22,7 @@ import (
 	"time"
 
 	"github.com/cznic/mathutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/auth"
 	"github.com/pingcap/parser/charset"
@@ -37,7 +38,6 @@ import (
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/format"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/show_stats.go b/executor/show_stats.go
index c221df9ba31d9..f6b604c749db7 100644
--- a/executor/show_stats.go
+++ b/executor/show_stats.go
@@ -16,12 +16,12 @@ package executor
 import (
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/domain"
 	"github.com/pingcap/tidb/statistics"
 	"github.com/pingcap/tidb/store/tikv/oracle"
 	"github.com/pingcap/tidb/types"
-	"github.com/pkg/errors"
 )
 
 func (e *ShowExec) fetchShowStatsMeta() error {
diff --git a/executor/show_test.go b/executor/show_test.go
index 61da51ad0f175..ce396ec8995c3 100644
--- a/executor/show_test.go
+++ b/executor/show_test.go
@@ -19,6 +19,7 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/auth"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -30,7 +31,6 @@ import (
 	"github.com/pingcap/tidb/sessionctx/variable"
 	"github.com/pingcap/tidb/util/testkit"
 	"github.com/pingcap/tidb/util/testutil"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/simple.go b/executor/simple.go
index 849c874a3d40b..66a2ee04a6abe 100644
--- a/executor/simple.go
+++ b/executor/simple.go
@@ -17,6 +17,7 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/auth"
 	"github.com/pingcap/parser/model"
@@ -29,7 +30,6 @@ import (
 	"github.com/pingcap/tidb/sessionctx/variable"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/executor/sort.go b/executor/sort.go
index 6dcb74361d8d9..0625567423c1e 100644
--- a/executor/sort.go
+++ b/executor/sort.go
@@ -18,12 +18,12 @@ import (
 	"sort"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/expression"
 	plannercore "github.com/pingcap/tidb/planner/core"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/memory"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/table_reader.go b/executor/table_reader.go
index 3c81d402d141c..9e3a94c9092dd 100644
--- a/executor/table_reader.go
+++ b/executor/table_reader.go
@@ -16,6 +16,7 @@ package executor
 import (
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/distsql"
 	plannercore "github.com/pingcap/tidb/planner/core"
@@ -24,7 +25,6 @@ import (
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/ranger"
 	tipb "github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/trace.go b/executor/trace.go
index 6112ea85b4d50..46514f2da1e14 100644
--- a/executor/trace.go
+++ b/executor/trace.go
@@ -18,12 +18,12 @@ import (
 
 	"github.com/opentracing/basictracer-go"
 	opentracing "github.com/opentracing/opentracing-go"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/tidb/planner"
 	plannercore "github.com/pingcap/tidb/planner/core"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/tracing"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/union_scan.go b/executor/union_scan.go
index aad9bb157fef4..ee12f0925f990 100644
--- a/executor/union_scan.go
+++ b/executor/union_scan.go
@@ -17,12 +17,12 @@ import (
 	"sort"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/update.go b/executor/update.go
index 3e653f800ebbf..0f1db7b120646 100644
--- a/executor/update.go
+++ b/executor/update.go
@@ -14,13 +14,13 @@
 package executor
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/executor/write.go b/executor/write.go
index 7f5b8709720d9..54d510e4d98f2 100644
--- a/executor/write.go
+++ b/executor/write.go
@@ -16,6 +16,7 @@ package executor
 import (
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/expression"
@@ -23,7 +24,6 @@ import (
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/table/tables"
 	"github.com/pingcap/tidb/types"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/expression/aggregation/aggregation.go b/expression/aggregation/aggregation.go
index 62eba44691139..e6cd17fc0c480 100644
--- a/expression/aggregation/aggregation.go
+++ b/expression/aggregation/aggregation.go
@@ -16,6 +16,7 @@ package aggregation
 import (
 	"bytes"
 	"fmt"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/model"
@@ -26,7 +27,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 )
 
 // Aggregation stands for aggregate functions.
diff --git a/expression/aggregation/avg.go b/expression/aggregation/avg.go
index 04d70fa985d04..65aeed0d55b30 100644
--- a/expression/aggregation/avg.go
+++ b/expression/aggregation/avg.go
@@ -15,12 +15,12 @@ package aggregation
 
 import (
 	"github.com/cznic/mathutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 type avgFunction struct {
diff --git a/expression/aggregation/bit_and.go b/expression/aggregation/bit_and.go
index 6fe2ef8f3ceba..420afec193b46 100644
--- a/expression/aggregation/bit_and.go
+++ b/expression/aggregation/bit_and.go
@@ -16,10 +16,10 @@ package aggregation
 import (
 	"math"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 type bitAndFunction struct {
diff --git a/expression/aggregation/bit_or.go b/expression/aggregation/bit_or.go
index 2ac5ab4a5e6df..a703d1ae91e6f 100644
--- a/expression/aggregation/bit_or.go
+++ b/expression/aggregation/bit_or.go
@@ -14,10 +14,10 @@
 package aggregation
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 type bitOrFunction struct {
diff --git a/expression/aggregation/bit_xor.go b/expression/aggregation/bit_xor.go
index 8cbfdeeb5a159..b510e71681ded 100644
--- a/expression/aggregation/bit_xor.go
+++ b/expression/aggregation/bit_xor.go
@@ -14,10 +14,10 @@
 package aggregation
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 type bitXorFunction struct {
diff --git a/expression/aggregation/concat.go b/expression/aggregation/concat.go
index b8b5eb995bab2..016c3591250f9 100644
--- a/expression/aggregation/concat.go
+++ b/expression/aggregation/concat.go
@@ -18,11 +18,11 @@ import (
 	"fmt"
 
 	"github.com/cznic/mathutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 type concatFunction struct {
diff --git a/expression/aggregation/count.go b/expression/aggregation/count.go
index 5a40d27bda188..bb6e210c56a3c 100644
--- a/expression/aggregation/count.go
+++ b/expression/aggregation/count.go
@@ -14,10 +14,10 @@
 package aggregation
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 type countFunction struct {
diff --git a/expression/aggregation/first_row.go b/expression/aggregation/first_row.go
index 89601eb674826..61f35851ff8c6 100644
--- a/expression/aggregation/first_row.go
+++ b/expression/aggregation/first_row.go
@@ -14,10 +14,10 @@
 package aggregation
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 type firstRowFunction struct {
diff --git a/expression/aggregation/max_min.go b/expression/aggregation/max_min.go
index 3e919c224ba98..af07db4c196c3 100644
--- a/expression/aggregation/max_min.go
+++ b/expression/aggregation/max_min.go
@@ -14,10 +14,10 @@
 package aggregation
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 type maxMinFunction struct {
diff --git a/expression/aggregation/util.go b/expression/aggregation/util.go
index eb9b297364974..97e9d4cb39f5f 100644
--- a/expression/aggregation/util.go
+++ b/expression/aggregation/util.go
@@ -14,11 +14,11 @@
 package aggregation
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tidb/util/mvmap"
-	"github.com/pkg/errors"
 )
 
 // distinctChecker stores existing keys and checks if given data is distinct.
diff --git a/expression/builtin_arithmetic.go b/expression/builtin_arithmetic.go
index 1f7369699519a..f0673f3c36bd6 100644
--- a/expression/builtin_arithmetic.go
+++ b/expression/builtin_arithmetic.go
@@ -18,13 +18,13 @@ import (
 	"math"
 
 	"github.com/cznic/mathutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 )
 
 var (
diff --git a/expression/builtin_cast.go b/expression/builtin_cast.go
index a6881861ff038..dd8067d14d908 100644
--- a/expression/builtin_cast.go
+++ b/expression/builtin_cast.go
@@ -26,6 +26,7 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/model"
@@ -36,7 +37,6 @@ import (
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 )
 
 var (
diff --git a/expression/builtin_compare.go b/expression/builtin_compare.go
index 0744720694378..4f641844f3d5e 100644
--- a/expression/builtin_compare.go
+++ b/expression/builtin_compare.go
@@ -16,6 +16,7 @@ package expression
 import (
 	"math"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/opcode"
@@ -25,7 +26,6 @@ import (
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 )
 
 var (
diff --git a/expression/builtin_compare_test.go b/expression/builtin_compare_test.go
index 24cd01ea541dd..3aee49ddaec77 100644
--- a/expression/builtin_compare_test.go
+++ b/expression/builtin_compare_test.go
@@ -17,13 +17,13 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 )
 
 func (s *testEvaluatorSuite) TestCompareFunctionWithRefine(c *C) {
diff --git a/expression/builtin_control.go b/expression/builtin_control.go
index fc8013f6096cc..bf588a058ae44 100644
--- a/expression/builtin_control.go
+++ b/expression/builtin_control.go
@@ -15,6 +15,7 @@ package expression
 
 import (
 	"github.com/cznic/mathutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/sessionctx"
@@ -22,7 +23,6 @@ import (
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 )
 
 var (
diff --git a/expression/builtin_encryption.go b/expression/builtin_encryption.go
index 7772cd344a8a2..7ad63ce8b26a4 100644
--- a/expression/builtin_encryption.go
+++ b/expression/builtin_encryption.go
@@ -28,6 +28,7 @@ import (
 	"io"
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/auth"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/sessionctx"
@@ -35,7 +36,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/encrypt"
-	"github.com/pkg/errors"
 )
 
 var (
diff --git a/expression/builtin_info.go b/expression/builtin_info.go
index 62b04255af9c9..a597edb0ffc12 100644
--- a/expression/builtin_info.go
+++ b/expression/builtin_info.go
@@ -18,12 +18,12 @@
 package expression
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/printer"
-	"github.com/pkg/errors"
 )
 
 var (
diff --git a/expression/builtin_json.go b/expression/builtin_json.go
index f922c6cac8d90..d372bb89430d4 100644
--- a/expression/builtin_json.go
+++ b/expression/builtin_json.go
@@ -14,6 +14,7 @@
 package expression
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/sessionctx"
@@ -21,7 +22,6 @@ import (
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 )
 
 var (
diff --git a/expression/builtin_like.go b/expression/builtin_like.go
index 43312813cae94..1409f6ec2cfd7 100644
--- a/expression/builtin_like.go
+++ b/expression/builtin_like.go
@@ -16,12 +16,12 @@ package expression
 import (
 	"regexp"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/stringutil"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 )
 
 var (
diff --git a/expression/builtin_math.go b/expression/builtin_math.go
index f0770420e0cf9..8ddec64a81391 100644
--- a/expression/builtin_math.go
+++ b/expression/builtin_math.go
@@ -27,12 +27,12 @@ import (
 	"time"
 
 	"github.com/cznic/mathutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 )
 
 var (
diff --git a/expression/builtin_miscellaneous.go b/expression/builtin_miscellaneous.go
index c046861911395..440d7778cbdc0 100644
--- a/expression/builtin_miscellaneous.go
+++ b/expression/builtin_miscellaneous.go
@@ -21,13 +21,13 @@ import (
 	"strings"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 	"github.com/twinj/uuid"
 )
 
diff --git a/expression/builtin_op.go b/expression/builtin_op.go
index e98d83af53835..e5f5d57c9e69d 100644
--- a/expression/builtin_op.go
+++ b/expression/builtin_op.go
@@ -17,13 +17,13 @@ import (
 	"fmt"
 	"math"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/opcode"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 )
 
 var (
diff --git a/expression/builtin_op_test.go b/expression/builtin_op_test.go
index f57f17aab557f..3273369772113 100644
--- a/expression/builtin_op_test.go
+++ b/expression/builtin_op_test.go
@@ -17,12 +17,12 @@ import (
 	"math"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/testleak"
 	"github.com/pingcap/tidb/util/testutil"
-	"github.com/pkg/errors"
 )
 
 func (s *testEvaluatorSuite) TestUnary(c *C) {
diff --git a/expression/builtin_other.go b/expression/builtin_other.go
index 7cfc36e46541a..05ae92f164d7b 100644
--- a/expression/builtin_other.go
+++ b/expression/builtin_other.go
@@ -16,13 +16,13 @@ package expression
 import (
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 )
 
 var (
diff --git a/expression/builtin_string.go b/expression/builtin_string.go
index ac1dc3f2a8b53..d2fb81287d754 100644
--- a/expression/builtin_string.go
+++ b/expression/builtin_string.go
@@ -27,6 +27,7 @@ import (
 	"strings"
 	"unicode/utf8"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/mysql"
@@ -35,7 +36,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/hack"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/text/transform"
 )
diff --git a/expression/builtin_string_test.go b/expression/builtin_string_test.go
index 9d229bd19e132..d78eb4b23c00c 100644
--- a/expression/builtin_string_test.go
+++ b/expression/builtin_string_test.go
@@ -20,6 +20,7 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/mysql"
@@ -30,7 +31,6 @@ import (
 	"github.com/pingcap/tidb/util/mock"
 	"github.com/pingcap/tidb/util/testleak"
 	"github.com/pingcap/tidb/util/testutil"
-	"github.com/pkg/errors"
 )
 
 func (s *testEvaluatorSuite) TestLength(c *C) {
diff --git a/expression/builtin_test.go b/expression/builtin_test.go
index 2be7dccf751cf..9ea28f93b2f23 100644
--- a/expression/builtin_test.go
+++ b/expression/builtin_test.go
@@ -17,6 +17,7 @@ import (
 	"reflect"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/model"
@@ -25,7 +26,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 )
 
 func evalBuiltinFunc(f builtinFunc, row chunk.Row) (d types.Datum, err error) {
diff --git a/expression/builtin_time.go b/expression/builtin_time.go
index d171e058896e8..ea4fde8971b4e 100644
--- a/expression/builtin_time.go
+++ b/expression/builtin_time.go
@@ -26,6 +26,7 @@ import (
 	"time"
 
 	"github.com/cznic/mathutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/sessionctx"
@@ -33,7 +34,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/expression/builtin_time_test.go b/expression/builtin_time_test.go
index 903985f6d4c48..fadadc2783599 100644
--- a/expression/builtin_time_test.go
+++ b/expression/builtin_time_test.go
@@ -20,6 +20,7 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/mysql"
@@ -32,7 +33,6 @@ import (
 	"github.com/pingcap/tidb/util/testleak"
 	"github.com/pingcap/tidb/util/testutil"
 	"github.com/pingcap/tidb/util/timeutil"
-	"github.com/pkg/errors"
 )
 
 func (s *testEvaluatorSuite) TestDate(c *C) {
diff --git a/expression/chunk_executor.go b/expression/chunk_executor.go
index 76efd21031af0..5a02dc88ce94a 100644
--- a/expression/chunk_executor.go
+++ b/expression/chunk_executor.go
@@ -16,12 +16,12 @@ package expression
 import (
 	"strconv"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 // Vectorizable checks whether a list of expressions can employ vectorized execution.
diff --git a/expression/column.go b/expression/column.go
index 5306565373996..551ad98a76a2e 100644
--- a/expression/column.go
+++ b/expression/column.go
@@ -17,6 +17,7 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/sessionctx"
@@ -25,7 +26,6 @@ import (
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/codec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/expression/constant.go b/expression/constant.go
index 3c6a95948f446..374bd2a434cea 100644
--- a/expression/constant.go
+++ b/expression/constant.go
@@ -16,6 +16,7 @@ package expression
 import (
 	"fmt"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/sessionctx"
@@ -24,7 +25,6 @@ import (
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/codec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/expression/constant_propagation.go b/expression/constant_propagation.go
index 87018232fb4a5..3b49189f067d2 100644
--- a/expression/constant_propagation.go
+++ b/expression/constant_propagation.go
@@ -14,6 +14,7 @@
 package expression
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
@@ -21,7 +22,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/disjointset"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/expression/distsql_builtin.go b/expression/distsql_builtin.go
index 7d90ff1db72af..45e4387bfdc01 100644
--- a/expression/distsql_builtin.go
+++ b/expression/distsql_builtin.go
@@ -17,6 +17,7 @@ import (
 	"fmt"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/sessionctx"
@@ -25,7 +26,6 @@ import (
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tidb/util/mock"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 )
 
 func pbTypeToFieldType(tp *tipb.FieldType) *types.FieldType {
diff --git a/expression/evaluator.go b/expression/evaluator.go
index 84f2cc81627c8..7fa7416658145 100644
--- a/expression/evaluator.go
+++ b/expression/evaluator.go
@@ -14,9 +14,9 @@
 package expression
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 type columnEvaluator struct {
diff --git a/expression/expr_to_pb.go b/expression/expr_to_pb.go
index 1e5384c60de6a..7e37f2865ce2f 100644
--- a/expression/expr_to_pb.go
+++ b/expression/expr_to_pb.go
@@ -16,6 +16,7 @@ package expression
 import (
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/mysql"
@@ -26,7 +27,6 @@ import (
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/expression/expression.go b/expression/expression.go
index 5d6fa3a276723..1d00438a34f41 100644
--- a/expression/expression.go
+++ b/expression/expression.go
@@ -17,6 +17,7 @@ import (
 	goJSON "encoding/json"
 	"fmt"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -26,7 +27,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 // These are byte flags used for `HashCode()`.
diff --git a/expression/helper.go b/expression/helper.go
index 7759d944b756b..6c07741675e56 100644
--- a/expression/helper.go
+++ b/expression/helper.go
@@ -18,6 +18,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
@@ -25,7 +26,6 @@ import (
 	"github.com/pingcap/tidb/sessionctx/variable"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/types/parser_driver"
-	"github.com/pkg/errors"
 )
 
 func boolToInt64(v bool) int64 {
diff --git a/expression/integration_test.go b/expression/integration_test.go
index edc36a3f5c631..345427843f032 100644
--- a/expression/integration_test.go
+++ b/expression/integration_test.go
@@ -21,6 +21,7 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/auth"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -38,7 +39,6 @@ import (
 	"github.com/pingcap/tidb/util/testkit"
 	"github.com/pingcap/tidb/util/testleak"
 	"github.com/pingcap/tidb/util/testutil"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/expression/scalar_function.go b/expression/scalar_function.go
index 7705c2ff48b08..e0c1a13b8ea00 100644
--- a/expression/scalar_function.go
+++ b/expression/scalar_function.go
@@ -17,6 +17,7 @@ import (
 	"bytes"
 	"fmt"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -28,7 +29,6 @@ import (
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tidb/util/hack"
-	"github.com/pkg/errors"
 )
 
 // ScalarFunction is the function that returns a value.
diff --git a/expression/schema.go b/expression/schema.go
index 50cdb9d6b4dbf..c6a7fce83b69e 100644
--- a/expression/schema.go
+++ b/expression/schema.go
@@ -16,8 +16,8 @@ package expression
 import (
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
-	"github.com/pkg/errors"
 )
 
 // KeyInfo stores the columns of one unique key or primary key.
diff --git a/expression/simple_rewriter.go b/expression/simple_rewriter.go
index fd57d166bb4a6..879d3e8121516 100644
--- a/expression/simple_rewriter.go
+++ b/expression/simple_rewriter.go
@@ -14,6 +14,7 @@
 package expression
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
@@ -22,7 +23,6 @@ import (
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/types/parser_driver"
-	"github.com/pkg/errors"
 )
 
 type simpleRewriter struct {
diff --git a/expression/util.go b/expression/util.go
index 6bf507fd17e52..679be67795bca 100644
--- a/expression/util.go
+++ b/expression/util.go
@@ -19,6 +19,7 @@ import (
 	"time"
 	"unicode"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/opcode"
@@ -27,7 +28,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/hack"
-	"github.com/pkg/errors"
 )
 
 // Filter the input expressions, append the results to result.
diff --git a/infoschema/builder.go b/infoschema/builder.go
index 2f6b1a6ebc3b8..417d8f6d60717 100644
--- a/infoschema/builder.go
+++ b/infoschema/builder.go
@@ -17,13 +17,13 @@ import (
 	"fmt"
 	"sort"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/meta"
 	"github.com/pingcap/tidb/meta/autoid"
 	"github.com/pingcap/tidb/perfschema"
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/table/tables"
-	"github.com/pkg/errors"
 )
 
 // Builder builds a new InfoSchema.
diff --git a/infoschema/infoschema_test.go b/infoschema/infoschema_test.go
index 13b4217fcdbf1..7baee0a30a980 100644
--- a/infoschema/infoschema_test.go
+++ b/infoschema/infoschema_test.go
@@ -18,6 +18,7 @@ import (
 	"testing"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/infoschema"
@@ -28,7 +29,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/testleak"
 	"github.com/pingcap/tidb/util/testutil"
-	"github.com/pkg/errors"
 )
 
 func TestT(t *testing.T) {
diff --git a/infoschema/tables.go b/infoschema/tables.go
index 5f83a20258394..24161a2966a75 100644
--- a/infoschema/tables.go
+++ b/infoschema/tables.go
@@ -19,6 +19,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -30,7 +31,6 @@ import (
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 )
 
 const (
diff --git a/kv/buffer_store.go b/kv/buffer_store.go
index 5e798db5c8875..4854fe0a6eab7 100644
--- a/kv/buffer_store.go
+++ b/kv/buffer_store.go
@@ -14,7 +14,7 @@
 package kv
 
 import (
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 )
 
 var (
diff --git a/kv/fault_injection_test.go b/kv/fault_injection_test.go
index 2c38853c3cd20..ec35944319fa5 100644
--- a/kv/fault_injection_test.go
+++ b/kv/fault_injection_test.go
@@ -15,8 +15,8 @@ package kv_test
 
 import (
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/kv"
-	"github.com/pkg/errors"
 )
 
 type testFaultInjectionSuite struct{}
diff --git a/kv/iter.go b/kv/iter.go
index 1551391ea0627..a5dd140eaa0fd 100644
--- a/kv/iter.go
+++ b/kv/iter.go
@@ -13,7 +13,7 @@
 
 package kv
 
-import "github.com/pkg/errors"
+import "github.com/pingcap/errors"
 
 // NextUntil applies FnKeyCmp to each entry of the iterator until meets some condition.
 // It will stop when fn returns true, or iterator is invalid or an error occurs.
diff --git a/kv/memdb_buffer.go b/kv/memdb_buffer.go
index 76b93c355479c..3066288f4146f 100644
--- a/kv/memdb_buffer.go
+++ b/kv/memdb_buffer.go
@@ -18,13 +18,13 @@ package kv
 import (
 	"sync/atomic"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/goleveldb/leveldb"
 	"github.com/pingcap/goleveldb/leveldb/comparer"
 	"github.com/pingcap/goleveldb/leveldb/iterator"
 	"github.com/pingcap/goleveldb/leveldb/memdb"
 	"github.com/pingcap/goleveldb/leveldb/util"
 	"github.com/pingcap/parser/terror"
-	"github.com/pkg/errors"
 )
 
 // memDbBuffer implements the MemBuffer interface.
diff --git a/kv/mock.go b/kv/mock.go
index 9fb8a0559c33d..4dc7fafa490e0 100644
--- a/kv/mock.go
+++ b/kv/mock.go
@@ -14,8 +14,8 @@
 package kv
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/store/tikv/oracle"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/kv/txn.go b/kv/txn.go
index 74c1bd10cf2ce..1abb81f9a440a 100644
--- a/kv/txn.go
+++ b/kv/txn.go
@@ -18,8 +18,8 @@ import (
 	"math/rand"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/kv/union_iter.go b/kv/union_iter.go
index c4ae42cfd5766..01f198918f8b2 100644
--- a/kv/union_iter.go
+++ b/kv/union_iter.go
@@ -14,7 +14,7 @@
 package kv
 
 import (
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/kv/union_store.go b/kv/union_store.go
index 6e3111f3ca240..016f9f9d9d5d2 100644
--- a/kv/union_store.go
+++ b/kv/union_store.go
@@ -16,7 +16,7 @@ package kv
 import (
 	"bytes"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 )
 
 // UnionStore is a store that wraps a snapshot for read and a BufferStore for buffered write.
diff --git a/kv/utils.go b/kv/utils.go
index 214745bfadb41..9456e204f2c27 100644
--- a/kv/utils.go
+++ b/kv/utils.go
@@ -16,7 +16,7 @@ package kv
 import (
 	"strconv"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 )
 
 // IncInt64 increases the value for key k in kv store by step.
diff --git a/meta/autoid/autoid.go b/meta/autoid/autoid.go
index 4c8ba2e189473..9cd045226eaf2 100644
--- a/meta/autoid/autoid.go
+++ b/meta/autoid/autoid.go
@@ -20,11 +20,11 @@ import (
 	"time"
 
 	"github.com/cznic/mathutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/meta"
 	"github.com/pingcap/tidb/metrics"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/meta/autoid/autoid_test.go b/meta/autoid/autoid_test.go
index 173466190c53e..fcec3999a0731 100644
--- a/meta/autoid/autoid_test.go
+++ b/meta/autoid/autoid_test.go
@@ -20,12 +20,12 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/meta"
 	"github.com/pingcap/tidb/meta/autoid"
 	"github.com/pingcap/tidb/store/mockstore"
-	"github.com/pkg/errors"
 )
 
 func TestT(t *testing.T) {
diff --git a/meta/meta.go b/meta/meta.go
index e2fac6203cfbc..901b69f450adc 100644
--- a/meta/meta.go
+++ b/meta/meta.go
@@ -24,13 +24,13 @@ import (
 	"sync"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/metrics"
 	"github.com/pingcap/tidb/structure"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/metrics/server.go b/metrics/server.go
index c18058f1461eb..c8d5604a31e2c 100644
--- a/metrics/server.go
+++ b/metrics/server.go
@@ -16,8 +16,8 @@ package metrics
 import (
 	"strconv"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
-	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
diff --git a/owner/manager.go b/owner/manager.go
index 640bb5d571cf6..3b4afa789dc6b 100644
--- a/owner/manager.go
+++ b/owner/manager.go
@@ -26,10 +26,10 @@ import (
 	"github.com/coreos/etcd/clientv3/concurrency"
 	"github.com/coreos/etcd/etcdserver/api/v3rpc/rpctypes"
 	"github.com/coreos/etcd/mvcc/mvccpb"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/metrics"
 	"github.com/pingcap/tidb/util"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 	"google.golang.org/grpc"
diff --git a/owner/mock.go b/owner/mock.go
index 5266ba9b2553d..0cb13378897b2 100644
--- a/owner/mock.go
+++ b/owner/mock.go
@@ -16,7 +16,7 @@ package owner
 import (
 	"sync/atomic"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/planner/core/cbo_test.go b/planner/core/cbo_test.go
index 4046e2b7c71e5..bfdfdd07edd92 100644
--- a/planner/core/cbo_test.go
+++ b/planner/core/cbo_test.go
@@ -19,6 +19,7 @@ import (
 	"testing"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/config"
 	"github.com/pingcap/tidb/domain"
 	"github.com/pingcap/tidb/kv"
@@ -30,7 +31,6 @@ import (
 	"github.com/pingcap/tidb/store/mockstore"
 	"github.com/pingcap/tidb/util/testkit"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 )
 
 var _ = Suite(&testAnalyzeSuite{})
diff --git a/planner/core/common_plans.go b/planner/core/common_plans.go
index 89810c1ae9add..f38d9594b4899 100644
--- a/planner/core/common_plans.go
+++ b/planner/core/common_plans.go
@@ -19,6 +19,7 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/auth"
 	"github.com/pingcap/parser/model"
@@ -32,7 +33,6 @@ import (
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/kvcache"
 	"github.com/pingcap/tidb/util/ranger"
-	"github.com/pkg/errors"
 )
 
 // ShowDDL is for showing DDL information.
diff --git a/planner/core/exhaust_physical_plans.go b/planner/core/exhaust_physical_plans.go
index 4a15030fde6cc..27214b59a9a60 100644
--- a/planner/core/exhaust_physical_plans.go
+++ b/planner/core/exhaust_physical_plans.go
@@ -16,6 +16,7 @@ package core
 import (
 	"math"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -25,7 +26,6 @@ import (
 	"github.com/pingcap/tidb/planner/property"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/ranger"
-	"github.com/pkg/errors"
 )
 
 func (p *LogicalUnionScan) exhaustPhysicalPlans(prop *property.PhysicalProperty) []PhysicalPlan {
diff --git a/planner/core/expression_rewriter.go b/planner/core/expression_rewriter.go
index 0719039f3f6c6..3693a5d92d55f 100644
--- a/planner/core/expression_rewriter.go
+++ b/planner/core/expression_rewriter.go
@@ -17,6 +17,7 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -29,7 +30,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/types/parser_driver"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 // EvalSubquery evaluates incorrelated subqueries once.
diff --git a/planner/core/find_best_task.go b/planner/core/find_best_task.go
index d937fd627650f..5321f945c1b57 100644
--- a/planner/core/find_best_task.go
+++ b/planner/core/find_best_task.go
@@ -16,6 +16,7 @@ package core
 import (
 	"math"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/expression"
@@ -23,7 +24,6 @@ import (
 	"github.com/pingcap/tidb/planner/property"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 const (
diff --git a/planner/core/logical_plan_builder.go b/planner/core/logical_plan_builder.go
index 724705af02872..b92ce2393e403 100644
--- a/planner/core/logical_plan_builder.go
+++ b/planner/core/logical_plan_builder.go
@@ -22,6 +22,7 @@ import (
 	"unicode"
 
 	"github.com/cznic/mathutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
@@ -39,7 +40,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/types/parser_driver"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 const (
diff --git a/planner/core/logical_plans.go b/planner/core/logical_plans.go
index b5fae30185ae6..c750edb595ed8 100644
--- a/planner/core/logical_plans.go
+++ b/planner/core/logical_plans.go
@@ -16,6 +16,7 @@ package core
 import (
 	"math"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -25,7 +26,6 @@ import (
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/ranger"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/planner/core/logical_plans_test.go b/planner/core/logical_plans_test.go
index acda1c36ffbf1..3b162e7026c7f 100644
--- a/planner/core/logical_plans_test.go
+++ b/planner/core/logical_plans_test.go
@@ -17,6 +17,7 @@ import (
 	"fmt"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -24,7 +25,6 @@ import (
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 )
 
diff --git a/planner/core/optimizer.go b/planner/core/optimizer.go
index 84469150c29c6..305aa57eddb35 100644
--- a/planner/core/optimizer.go
+++ b/planner/core/optimizer.go
@@ -16,13 +16,13 @@ package core
 import (
 	"math"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/infoschema"
 	"github.com/pingcap/tidb/planner/property"
 	"github.com/pingcap/tidb/privilege"
 	"github.com/pingcap/tidb/sessionctx"
-	"github.com/pkg/errors"
 )
 
 // OptimizeAstNode optimizes the query to a physical plan directly.
diff --git a/planner/core/plan.go b/planner/core/plan.go
index e573be27213d3..ca17f0ed7a7d4 100644
--- a/planner/core/plan.go
+++ b/planner/core/plan.go
@@ -17,12 +17,12 @@ import (
 	"fmt"
 	"math"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/planner/property"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 )
 
 // Plan is the description of an execution flow.
diff --git a/planner/core/plan_to_pb.go b/planner/core/plan_to_pb.go
index 258fd5b30bc46..80cf81c8e6258 100644
--- a/planner/core/plan_to_pb.go
+++ b/planner/core/plan_to_pb.go
@@ -14,6 +14,7 @@
 package core
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/expression/aggregation"
@@ -22,7 +23,6 @@ import (
 	"github.com/pingcap/tidb/tablecodec"
 	"github.com/pingcap/tidb/util/ranger"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 )
 
 // ToPB implements PhysicalPlan ToPB interface.
diff --git a/planner/core/planbuilder.go b/planner/core/planbuilder.go
index 2140c89369d14..19ea97c150af4 100644
--- a/planner/core/planbuilder.go
+++ b/planner/core/planbuilder.go
@@ -18,6 +18,7 @@ import (
 	"strings"
 
 	"github.com/cznic/mathutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -31,7 +32,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/types/parser_driver"
 	"github.com/pingcap/tidb/util/ranger"
-	"github.com/pkg/errors"
 )
 
 type visitInfo struct {
diff --git a/planner/core/point_get_plan.go b/planner/core/point_get_plan.go
index f8ae66079d585..62c6c71816229 100644
--- a/planner/core/point_get_plan.go
+++ b/planner/core/point_get_plan.go
@@ -17,6 +17,7 @@ import (
 	"bytes"
 	"fmt"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -28,7 +29,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/types/parser_driver"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 )
 
 // PointGetPlan is a fast plan for simple point get.
diff --git a/planner/core/preprocess.go b/planner/core/preprocess.go
index dc4154acfc774..37e945cb9e43a 100644
--- a/planner/core/preprocess.go
+++ b/planner/core/preprocess.go
@@ -17,6 +17,7 @@ import (
 	"math"
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/charset"
@@ -27,7 +28,6 @@ import (
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/types/parser_driver"
-	"github.com/pkg/errors"
 )
 
 // Preprocess resolves table names of the node, and checks some statements validation.
diff --git a/planner/core/preprocess_test.go b/planner/core/preprocess_test.go
index fb6b1ae659990..45a8200f451d0 100644
--- a/planner/core/preprocess_test.go
+++ b/planner/core/preprocess_test.go
@@ -15,6 +15,7 @@ package core_test
 
 import (
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/terror"
@@ -25,7 +26,6 @@ import (
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/planner/core/rule_decorrelate.go b/planner/core/rule_decorrelate.go
index bef4ef1b3b88e..f873cd5adc9ad 100644
--- a/planner/core/rule_decorrelate.go
+++ b/planner/core/rule_decorrelate.go
@@ -16,12 +16,12 @@ package core
 import (
 	"math"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/expression/aggregation"
 	"github.com/pingcap/tidb/types"
-	"github.com/pkg/errors"
 )
 
 // extractCorColumnsBySchema only extracts the correlated columns that match the outer plan's schema.
diff --git a/planner/core/rule_partition_processor.go b/planner/core/rule_partition_processor.go
index fc68e0e21a8ff..beefd81bb0779 100644
--- a/planner/core/rule_partition_processor.go
+++ b/planner/core/rule_partition_processor.go
@@ -13,11 +13,11 @@
 package core
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/table/tables"
 	"github.com/pingcap/tidb/util/ranger"
-	"github.com/pkg/errors"
 )
 
 // partitionProcessor rewrites the ast for table partition.
diff --git a/planner/core/stats.go b/planner/core/stats.go
index 4d7696a824154..050e9e8a1450f 100644
--- a/planner/core/stats.go
+++ b/planner/core/stats.go
@@ -16,9 +16,9 @@ package core
 import (
 	"math"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/planner/property"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/planner/optimize.go b/planner/optimize.go
index b17aa11adc8af..06f6d730ffdc2 100644
--- a/planner/optimize.go
+++ b/planner/optimize.go
@@ -14,12 +14,12 @@
 package planner
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/tidb/infoschema"
 	plannercore "github.com/pingcap/tidb/planner/core"
 	"github.com/pingcap/tidb/privilege"
 	"github.com/pingcap/tidb/sessionctx"
-	"github.com/pkg/errors"
 )
 
 // Optimize does optimization and creates a Plan.
diff --git a/privilege/privileges/cache.go b/privilege/privileges/cache.go
index 43bcd6f9f49fc..8ddf1fabd5e27 100644
--- a/privilege/privileges/cache.go
+++ b/privilege/privileges/cache.go
@@ -20,6 +20,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
@@ -28,7 +29,6 @@ import (
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/sqlexec"
 	"github.com/pingcap/tidb/util/stringutil"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/server/conn.go b/server/conn.go
index 09fe05762c131..1d8e4d42910af 100644
--- a/server/conn.go
+++ b/server/conn.go
@@ -49,6 +49,7 @@ import (
 	"time"
 
 	"github.com/opentracing/opentracing-go"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/auth"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
@@ -60,7 +61,6 @@ import (
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/hack"
 	"github.com/pingcap/tidb/util/memory"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/server/conn_stmt.go b/server/conn_stmt.go
index 9a058e506d925..b46a2f7ca640b 100644
--- a/server/conn_stmt.go
+++ b/server/conn_stmt.go
@@ -41,10 +41,10 @@ import (
 	"strconv"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/hack"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/server/driver_tidb.go b/server/driver_tidb.go
index 065a9973cdb8d..8bdd542db1565 100644
--- a/server/driver_tidb.go
+++ b/server/driver_tidb.go
@@ -18,6 +18,7 @@ import (
 	"fmt"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/auth"
 	"github.com/pingcap/parser/mysql"
@@ -29,7 +30,6 @@ import (
 	"github.com/pingcap/tidb/util"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/server/http_handler.go b/server/http_handler.go
index 9802b9e84c839..beb14014d4a75 100644
--- a/server/http_handler.go
+++ b/server/http_handler.go
@@ -28,6 +28,7 @@ import (
 	"time"
 
 	"github.com/gorilla/mux"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/kvproto/pkg/metapb"
 	"github.com/pingcap/parser/model"
@@ -48,7 +49,6 @@ import (
 	"github.com/pingcap/tidb/tablecodec"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/codec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/server/http_status.go b/server/http_status.go
index 5e872582592be..9026f36d7af7d 100644
--- a/server/http_status.go
+++ b/server/http_status.go
@@ -21,11 +21,11 @@ import (
 	"net/http/pprof"
 
 	"github.com/gorilla/mux"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/util/printer"
-	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
 	log "github.com/sirupsen/logrus"
 )
diff --git a/server/packetio.go b/server/packetio.go
index 1e95b6a0e2e35..74b07b68bc291 100644
--- a/server/packetio.go
+++ b/server/packetio.go
@@ -38,9 +38,9 @@ import (
 	"bufio"
 	"io"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
-	"github.com/pkg/errors"
 )
 
 const defaultWriterSize = 16 * 1024
diff --git a/server/server.go b/server/server.go
index 51cc6930a6c9d..8854f9cb12050 100644
--- a/server/server.go
+++ b/server/server.go
@@ -43,13 +43,13 @@ import (
 	"time"
 
 	"github.com/blacktear23/go-proxyprotocol"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/config"
 	"github.com/pingcap/tidb/metrics"
 	"github.com/pingcap/tidb/sessionctx/variable"
 	"github.com/pingcap/tidb/util"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/server/tidb_test.go b/server/tidb_test.go
index f43b6ae31c4a7..a1713363d5e2c 100644
--- a/server/tidb_test.go
+++ b/server/tidb_test.go
@@ -28,6 +28,7 @@ import (
 
 	"github.com/go-sql-driver/mysql"
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	tmysql "github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/config"
 	"github.com/pingcap/tidb/domain"
@@ -35,7 +36,6 @@ import (
 	"github.com/pingcap/tidb/metrics"
 	"github.com/pingcap/tidb/session"
 	"github.com/pingcap/tidb/store/mockstore"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/server/util.go b/server/util.go
index a2d351278fc69..ac1db185ed97b 100644
--- a/server/util.go
+++ b/server/util.go
@@ -43,12 +43,12 @@ import (
 	"strconv"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/config"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/hack"
-	"github.com/pkg/errors"
 )
 
 func parseNullTermString(b []byte) (str []byte, remain []byte) {
diff --git a/server/util_test.go b/server/util_test.go
index cd18b4c8e98fa..0cad0507a7b90 100644
--- a/server/util_test.go
+++ b/server/util_test.go
@@ -15,6 +15,7 @@ package server
 
 import (
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/domain"
 	"github.com/pingcap/tidb/kv"
@@ -23,7 +24,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 )
 
 var _ = Suite(&testUtilSuite{})
diff --git a/session/bootstrap.go b/session/bootstrap.go
index 424779630306a..696c06eb2888e 100644
--- a/session/bootstrap.go
+++ b/session/bootstrap.go
@@ -25,6 +25,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/auth"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
@@ -33,7 +34,6 @@ import (
 	"github.com/pingcap/tidb/sessionctx/variable"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/timeutil"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/session/session.go b/session/session.go
index 32ba44cb68e13..c52d2fb71fda4 100644
--- a/session/session.go
+++ b/session/session.go
@@ -28,6 +28,7 @@ import (
 	"time"
 
 	"github.com/ngaut/pools"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/auth"
@@ -56,7 +57,6 @@ import (
 	"github.com/pingcap/tidb/util/sqlexec"
 	"github.com/pingcap/tidb/util/timeutil"
 	"github.com/pingcap/tipb/go-binlog"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/session/tidb.go b/session/tidb.go
index 4f5fdd76ce428..32329ec76379f 100644
--- a/session/tidb.go
+++ b/session/tidb.go
@@ -23,6 +23,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/mysql"
@@ -35,7 +36,6 @@ import (
 	"github.com/pingcap/tidb/util"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/session/tidb_test.go b/session/tidb_test.go
index 38b3f693f1e80..6cb95320a7c0c 100644
--- a/session/tidb_test.go
+++ b/session/tidb_test.go
@@ -22,6 +22,7 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/auth"
 	"github.com/pingcap/tidb/domain"
 	"github.com/pingcap/tidb/kv"
@@ -30,7 +31,6 @@ import (
 	"github.com/pingcap/tidb/util/logutil"
 	"github.com/pingcap/tidb/util/sqlexec"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/session/txn.go b/session/txn.go
index 5b37b63ad29f3..0dc4445003eb2 100644
--- a/session/txn.go
+++ b/session/txn.go
@@ -14,6 +14,7 @@
 package session
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/executor"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/sessionctx"
@@ -22,7 +23,6 @@ import (
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/types"
 	binlog "github.com/pingcap/tipb/go-binlog"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/sessionctx/binloginfo/binloginfo.go b/sessionctx/binloginfo/binloginfo.go
index 1a5c100695796..3997bd481d247 100644
--- a/sessionctx/binloginfo/binloginfo.go
+++ b/sessionctx/binloginfo/binloginfo.go
@@ -21,6 +21,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb-tools/tidb-binlog/node"
 	pumpcli "github.com/pingcap/tidb-tools/tidb-binlog/pump_client"
@@ -28,7 +29,6 @@ import (
 	"github.com/pingcap/tidb/metrics"
 	"github.com/pingcap/tidb/sessionctx"
 	binlog "github.com/pingcap/tipb/go-binlog"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"google.golang.org/grpc"
 )
diff --git a/sessionctx/binloginfo/binloginfo_test.go b/sessionctx/binloginfo/binloginfo_test.go
index ca974637b4750..666df0e890aa5 100644
--- a/sessionctx/binloginfo/binloginfo_test.go
+++ b/sessionctx/binloginfo/binloginfo_test.go
@@ -22,6 +22,7 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
 	pumpcli "github.com/pingcap/tidb-tools/tidb-binlog/pump_client"
 	"github.com/pingcap/tidb/ddl"
@@ -36,7 +37,6 @@ import (
 	"github.com/pingcap/tidb/util/logutil"
 	"github.com/pingcap/tidb/util/testkit"
 	binlog "github.com/pingcap/tipb/go-binlog"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 )
diff --git a/sessionctx/variable/session.go b/sessionctx/variable/session.go
index b720753809ac4..b1c08416851b0 100644
--- a/sessionctx/variable/session.go
+++ b/sessionctx/variable/session.go
@@ -22,6 +22,7 @@ import (
 	"time"
 
 	"github.com/klauspost/cpuid"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/auth"
 	"github.com/pingcap/parser/mysql"
@@ -34,7 +35,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/timeutil"
-	"github.com/pkg/errors"
 )
 
 const (
diff --git a/sessionctx/variable/statusvar.go b/sessionctx/variable/statusvar.go
index f7d6f1a65c21f..d041103015dbd 100644
--- a/sessionctx/variable/statusvar.go
+++ b/sessionctx/variable/statusvar.go
@@ -17,7 +17,7 @@ import (
 	"bytes"
 	"crypto/tls"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 )
 
 var statisticsList []Statistics
diff --git a/sessionctx/variable/varsutil.go b/sessionctx/variable/varsutil.go
index 5f95fae07cf71..71ce27cd028ba 100644
--- a/sessionctx/variable/varsutil.go
+++ b/sessionctx/variable/varsutil.go
@@ -22,11 +22,11 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/config"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/timeutil"
-	"github.com/pkg/errors"
 )
 
 // secondsPerYear represents seconds in a normal year. Leap year is not considered here.
diff --git a/statistics/bootstrap.go b/statistics/bootstrap.go
index 8a346969f5a31..43e2d4fd2459b 100644
--- a/statistics/bootstrap.go
+++ b/statistics/bootstrap.go
@@ -16,6 +16,7 @@ package statistics
 import (
 	"fmt"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
@@ -24,7 +25,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/statistics/builder.go b/statistics/builder.go
index 4a820240cbf00..c9a66e057b501 100644
--- a/statistics/builder.go
+++ b/statistics/builder.go
@@ -14,10 +14,10 @@
 package statistics
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
-	"github.com/pkg/errors"
 )
 
 // SortedBuilder is used to build histograms for PK and index.
diff --git a/statistics/cmsketch.go b/statistics/cmsketch.go
index 6d16ad1546f89..18915ba5df25b 100644
--- a/statistics/cmsketch.go
+++ b/statistics/cmsketch.go
@@ -18,11 +18,11 @@ import (
 	"sort"
 
 	"github.com/cznic/sortutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	"github.com/spaolacci/murmur3"
 )
 
diff --git a/statistics/cmsketch_test.go b/statistics/cmsketch_test.go
index 2ad7a9868d86a..d9fcfce253b9e 100644
--- a/statistics/cmsketch_test.go
+++ b/statistics/cmsketch_test.go
@@ -19,10 +19,10 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/codec"
-	"github.com/pkg/errors"
 )
 
 func (c *CMSketch) insert(val *types.Datum) error {
diff --git a/statistics/ddl.go b/statistics/ddl.go
index b8cedc71fee1c..b984e2e3d9ba0 100644
--- a/statistics/ddl.go
+++ b/statistics/ddl.go
@@ -16,13 +16,13 @@ package statistics
 import (
 	"fmt"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/ddl/util"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/statistics/dump.go b/statistics/dump.go
index 49a08f127e838..907d380c3370c 100644
--- a/statistics/dump.go
+++ b/statistics/dump.go
@@ -16,13 +16,13 @@ package statistics
 import (
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/infoschema"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 )
 
 // JSONTable is used for dumping statistics.
diff --git a/statistics/feedback.go b/statistics/feedback.go
index 405c084943e63..7fe6478373676 100644
--- a/statistics/feedback.go
+++ b/statistics/feedback.go
@@ -23,6 +23,7 @@ import (
 	"time"
 
 	"github.com/cznic/mathutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/metrics"
@@ -32,7 +33,6 @@ import (
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tidb/util/ranger"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"github.com/spaolacci/murmur3"
 )
diff --git a/statistics/fmsketch.go b/statistics/fmsketch.go
index 8878a21f8e863..50c496b07db49 100644
--- a/statistics/fmsketch.go
+++ b/statistics/fmsketch.go
@@ -16,11 +16,11 @@ package statistics
 import (
 	"hash"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	"github.com/spaolacci/murmur3"
 )
 
diff --git a/statistics/gc.go b/statistics/gc.go
index 8aaeba70d2115..84405d63e6bbc 100644
--- a/statistics/gc.go
+++ b/statistics/gc.go
@@ -18,10 +18,10 @@ import (
 	"time"
 
 	"github.com/cznic/mathutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/infoschema"
 	"github.com/pingcap/tidb/store/tikv/oracle"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/statistics/handle.go b/statistics/handle.go
index 7033df47deed1..574b688b33681 100644
--- a/statistics/handle.go
+++ b/statistics/handle.go
@@ -19,6 +19,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/ddl/util"
 	"github.com/pingcap/tidb/infoschema"
@@ -26,7 +27,6 @@ import (
 	"github.com/pingcap/tidb/store/tikv/oracle"
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/statistics/handle_test.go b/statistics/handle_test.go
index 778e7cf06d7d6..08f5435fe6302 100644
--- a/statistics/handle_test.go
+++ b/statistics/handle_test.go
@@ -18,6 +18,7 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/domain"
 	"github.com/pingcap/tidb/kv"
@@ -29,7 +30,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/testkit"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 )
 
 var _ = Suite(&testStatsCacheSuite{})
diff --git a/statistics/histogram.go b/statistics/histogram.go
index 75905ecdfab41..bdcf31b4c6e83 100644
--- a/statistics/histogram.go
+++ b/statistics/histogram.go
@@ -20,6 +20,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
@@ -32,7 +33,6 @@ import (
 	"github.com/pingcap/tidb/util/ranger"
 	"github.com/pingcap/tidb/util/sqlexec"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/statistics/sample.go b/statistics/sample.go
index 70eed697a812a..b044dea396dc3 100644
--- a/statistics/sample.go
+++ b/statistics/sample.go
@@ -17,6 +17,7 @@ import (
 	"fmt"
 	"math/rand"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
@@ -25,7 +26,6 @@ import (
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/sqlexec"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/statistics/selectivity.go b/statistics/selectivity.go
index 58d4a6a9ffc62..d182adc565bce 100644
--- a/statistics/selectivity.go
+++ b/statistics/selectivity.go
@@ -16,12 +16,12 @@ package statistics
 import (
 	"math"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/util/ranger"
-	"github.com/pkg/errors"
 )
 
 // If one condition can't be calculated, we will assume that the selectivity of this condition is 0.8.
diff --git a/statistics/statistics_test.go b/statistics/statistics_test.go
index fb79e934c18be..8b47c4ba9c6c1 100644
--- a/statistics/statistics_test.go
+++ b/statistics/statistics_test.go
@@ -19,6 +19,7 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -31,7 +32,6 @@ import (
 	"github.com/pingcap/tidb/util/mock"
 	"github.com/pingcap/tidb/util/ranger"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/statistics/table.go b/statistics/table.go
index f2995f3c181e0..294bf9efde781 100644
--- a/statistics/table.go
+++ b/statistics/table.go
@@ -19,6 +19,7 @@ import (
 	"strings"
 	"sync"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/expression"
@@ -27,7 +28,6 @@ import (
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tidb/util/ranger"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/statistics/update.go b/statistics/update.go
index a66588487fed2..ce452c4a4ce0a 100644
--- a/statistics/update.go
+++ b/statistics/update.go
@@ -21,6 +21,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/infoschema"
 	"github.com/pingcap/tidb/metrics"
@@ -28,7 +29,6 @@ import (
 	"github.com/pingcap/tidb/store/tikv/oracle"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/store/mockoracle/oracle.go b/store/mockoracle/oracle.go
index 54933f0c10ef7..c918b3e474876 100644
--- a/store/mockoracle/oracle.go
+++ b/store/mockoracle/oracle.go
@@ -17,8 +17,8 @@ import (
 	"sync"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/store/tikv/oracle"
-	"github.com/pkg/errors"
 
 	"golang.org/x/net/context"
 )
diff --git a/store/mockstore/mocktikv/aggregate.go b/store/mockstore/mocktikv/aggregate.go
index 08dab065c6fb9..4c48df4fe0688 100644
--- a/store/mockstore/mocktikv/aggregate.go
+++ b/store/mockstore/mocktikv/aggregate.go
@@ -14,12 +14,12 @@
 package mocktikv
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/expression/aggregation"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/codec"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/store/mockstore/mocktikv/analyze.go b/store/mockstore/mocktikv/analyze.go
index 2659a4cde994e..2727efe1ce48a 100644
--- a/store/mockstore/mocktikv/analyze.go
+++ b/store/mockstore/mocktikv/analyze.go
@@ -15,6 +15,7 @@ package mocktikv
 
 import (
 	"github.com/golang/protobuf/proto"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/coprocessor"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/charset"
@@ -26,7 +27,6 @@ import (
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/store/mockstore/mocktikv/cop_handler_dag.go b/store/mockstore/mocktikv/cop_handler_dag.go
index 913f839c6d9e0..f1a74cf3da489 100644
--- a/store/mockstore/mocktikv/cop_handler_dag.go
+++ b/store/mockstore/mocktikv/cop_handler_dag.go
@@ -19,6 +19,7 @@ import (
 	"time"
 
 	"github.com/golang/protobuf/proto"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/coprocessor"
 	"github.com/pingcap/kvproto/pkg/errorpb"
 	"github.com/pingcap/kvproto/pkg/kvrpcpb"
@@ -36,7 +37,6 @@ import (
 	mockpkg "github.com/pingcap/tidb/util/mock"
 	"github.com/pingcap/tidb/util/timeutil"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/metadata"
diff --git a/store/mockstore/mocktikv/executor.go b/store/mockstore/mocktikv/executor.go
index 29f478b8e277f..8016947ab215c 100644
--- a/store/mockstore/mocktikv/executor.go
+++ b/store/mockstore/mocktikv/executor.go
@@ -18,6 +18,7 @@ import (
 	"encoding/binary"
 	"sort"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
@@ -29,7 +30,6 @@ import (
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/store/mockstore/mocktikv/mock.go b/store/mockstore/mocktikv/mock.go
index 1b4e08334a54f..660772f261bba 100644
--- a/store/mockstore/mocktikv/mock.go
+++ b/store/mockstore/mocktikv/mock.go
@@ -14,8 +14,8 @@
 package mocktikv
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/pd/client"
-	"github.com/pkg/errors"
 )
 
 // NewTiKVAndPDClient creates a TiKV client and PD client from options.
diff --git a/store/mockstore/mocktikv/mvcc.go b/store/mockstore/mocktikv/mvcc.go
index 28983d9656eee..b55b284f081b3 100644
--- a/store/mockstore/mocktikv/mvcc.go
+++ b/store/mockstore/mocktikv/mvcc.go
@@ -21,9 +21,9 @@ import (
 	"sort"
 
 	"github.com/google/btree"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/tidb/util/codec"
-	"github.com/pkg/errors"
 )
 
 type mvccValueType int
diff --git a/store/mockstore/mocktikv/mvcc_leveldb.go b/store/mockstore/mocktikv/mvcc_leveldb.go
index 53cdb92c5a5d9..0b27ebee5dee1 100644
--- a/store/mockstore/mocktikv/mvcc_leveldb.go
+++ b/store/mockstore/mocktikv/mvcc_leveldb.go
@@ -18,6 +18,7 @@ import (
 	"math"
 	"sync"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/goleveldb/leveldb"
 	"github.com/pingcap/goleveldb/leveldb/iterator"
 	"github.com/pingcap/goleveldb/leveldb/opt"
@@ -26,7 +27,6 @@ import (
 	"github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/util/codec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/store/mockstore/mocktikv/rpc.go b/store/mockstore/mocktikv/rpc.go
index 34ff33c87c5ec..96458eb569aa3 100644
--- a/store/mockstore/mocktikv/rpc.go
+++ b/store/mockstore/mocktikv/rpc.go
@@ -20,6 +20,7 @@ import (
 	"time"
 
 	"github.com/golang/protobuf/proto"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/coprocessor"
 	"github.com/pingcap/kvproto/pkg/errorpb"
 	"github.com/pingcap/kvproto/pkg/kvrpcpb"
@@ -27,7 +28,6 @@ import (
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/store/tikv/tikvrpc"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/store/mockstore/mocktikv/topn.go b/store/mockstore/mocktikv/topn.go
index b7a49110e429b..3b2a5d952c48a 100644
--- a/store/mockstore/mocktikv/topn.go
+++ b/store/mockstore/mocktikv/topn.go
@@ -16,10 +16,10 @@ package mocktikv
 import (
 	"container/heap"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 )
 
 type sortRow struct {
diff --git a/store/mockstore/tikv.go b/store/mockstore/tikv.go
index 7afbe7726bd23..a3c9fa75145db 100644
--- a/store/mockstore/tikv.go
+++ b/store/mockstore/tikv.go
@@ -17,12 +17,12 @@ import (
 	"net/url"
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/pd/client"
 	"github.com/pingcap/tidb/config"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/store/mockstore/mocktikv"
 	"github.com/pingcap/tidb/store/tikv"
-	"github.com/pkg/errors"
 )
 
 // MockDriver is in memory mock TiKV driver.
diff --git a/store/tikv/2pc.go b/store/tikv/2pc.go
index cc5220fd11850..9d785f3a9fe4c 100644
--- a/store/tikv/2pc.go
+++ b/store/tikv/2pc.go
@@ -20,6 +20,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/pingcap/errors"
 	pb "github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/kv"
@@ -28,7 +29,6 @@ import (
 	"github.com/pingcap/tidb/store/tikv/tikvrpc"
 	"github.com/pingcap/tidb/tablecodec"
 	binlog "github.com/pingcap/tipb/go-binlog"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/store/tikv/2pc_fail_test.go b/store/tikv/2pc_fail_test.go
index 1f2368d8fa833..ba85163394b3d 100644
--- a/store/tikv/2pc_fail_test.go
+++ b/store/tikv/2pc_fail_test.go
@@ -16,8 +16,8 @@ package tikv
 import (
 	gofail "github.com/etcd-io/gofail/runtime"
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/store/tikv/2pc_test.go b/store/tikv/2pc_test.go
index 724590523e0c8..a11eca3cac198 100644
--- a/store/tikv/2pc_test.go
+++ b/store/tikv/2pc_test.go
@@ -20,10 +20,10 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/tidb/store/mockstore/mocktikv"
 	"github.com/pingcap/tidb/store/tikv/tikvrpc"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/store/tikv/backoff.go b/store/tikv/backoff.go
index 297b3b45900ad..25c78cd9a60be 100644
--- a/store/tikv/backoff.go
+++ b/store/tikv/backoff.go
@@ -20,11 +20,11 @@ import (
 	"strings"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/metrics"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/store/tikv/client.go b/store/tikv/client.go
index 1633a01cde8ee..45d9239ac230a 100644
--- a/store/tikv/client.go
+++ b/store/tikv/client.go
@@ -24,13 +24,13 @@ import (
 	"github.com/grpc-ecosystem/go-grpc-middleware"
 	"github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing"
 	"github.com/grpc-ecosystem/go-grpc-prometheus"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/coprocessor"
 	"github.com/pingcap/kvproto/pkg/tikvpb"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/config"
 	"github.com/pingcap/tidb/metrics"
 	"github.com/pingcap/tidb/store/tikv/tikvrpc"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 	"google.golang.org/grpc"
diff --git a/store/tikv/coprocessor.go b/store/tikv/coprocessor.go
index 02d89a82dd4df..dc87f2454e62e 100644
--- a/store/tikv/coprocessor.go
+++ b/store/tikv/coprocessor.go
@@ -24,6 +24,7 @@ import (
 	"time"
 
 	"github.com/cznic/mathutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/coprocessor"
 	"github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/tidb/kv"
@@ -31,7 +32,6 @@ import (
 	"github.com/pingcap/tidb/store/tikv/tikvrpc"
 	"github.com/pingcap/tidb/util/execdetails"
 	"github.com/pingcap/tipb/go-tipb"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/store/tikv/delete_range.go b/store/tikv/delete_range.go
index 521a6a8139f59..5d75fc5230a09 100644
--- a/store/tikv/delete_range.go
+++ b/store/tikv/delete_range.go
@@ -17,9 +17,9 @@ import (
 	"bytes"
 	"context"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/tidb/store/tikv/tikvrpc"
-	"github.com/pkg/errors"
 )
 
 // DeleteRangeTask is used to delete all keys in a range. After
diff --git a/store/tikv/error.go b/store/tikv/error.go
index 9329de2eaf221..c05682c16de74 100644
--- a/store/tikv/error.go
+++ b/store/tikv/error.go
@@ -14,9 +14,9 @@
 package tikv
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
-	"github.com/pkg/errors"
 )
 
 var (
diff --git a/store/tikv/gcworker/gc_worker.go b/store/tikv/gcworker/gc_worker.go
index 22a8726e86d6a..8aa0dec84d615 100644
--- a/store/tikv/gcworker/gc_worker.go
+++ b/store/tikv/gcworker/gc_worker.go
@@ -22,6 +22,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/errorpb"
 	"github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/kvproto/pkg/metapb"
@@ -37,7 +38,6 @@ import (
 	"github.com/pingcap/tidb/store/tikv/oracle"
 	"github.com/pingcap/tidb/store/tikv/tikvrpc"
 	tidbutil "github.com/pingcap/tidb/util"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/store/tikv/kv.go b/store/tikv/kv.go
index fc834d1e530a3..68de31fa1ecc0 100644
--- a/store/tikv/kv.go
+++ b/store/tikv/kv.go
@@ -24,6 +24,7 @@ import (
 
 	"github.com/coreos/etcd/clientv3"
 	"github.com/grpc-ecosystem/go-grpc-prometheus"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/pd/client"
 	"github.com/pingcap/tidb/config"
 	"github.com/pingcap/tidb/kv"
@@ -32,7 +33,6 @@ import (
 	"github.com/pingcap/tidb/store/tikv/oracle"
 	"github.com/pingcap/tidb/store/tikv/oracle/oracles"
 	"github.com/pingcap/tidb/store/tikv/tikvrpc"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 	"google.golang.org/grpc"
diff --git a/store/tikv/lock_resolver.go b/store/tikv/lock_resolver.go
index a85415398dde6..e561d854d57b6 100644
--- a/store/tikv/lock_resolver.go
+++ b/store/tikv/lock_resolver.go
@@ -19,12 +19,12 @@ import (
 	"sync"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/pd/client"
 	"github.com/pingcap/tidb/config"
 	"github.com/pingcap/tidb/metrics"
 	"github.com/pingcap/tidb/store/tikv/tikvrpc"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/store/tikv/oracle/oracles/pd.go b/store/tikv/oracle/oracles/pd.go
index a8e7db8d8a02f..d618b91c74974 100644
--- a/store/tikv/oracle/oracles/pd.go
+++ b/store/tikv/oracle/oracles/pd.go
@@ -17,10 +17,10 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/pd/client"
 	"github.com/pingcap/tidb/metrics"
 	"github.com/pingcap/tidb/store/tikv/oracle"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/store/tikv/pd_codec.go b/store/tikv/pd_codec.go
index 1e871c4a223e2..a17509d28c9a0 100644
--- a/store/tikv/pd_codec.go
+++ b/store/tikv/pd_codec.go
@@ -14,10 +14,10 @@
 package tikv
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/metapb"
 	"github.com/pingcap/pd/client"
 	"github.com/pingcap/tidb/util/codec"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/store/tikv/rawkv.go b/store/tikv/rawkv.go
index adbd12b656ed7..f296d9e00d1fe 100644
--- a/store/tikv/rawkv.go
+++ b/store/tikv/rawkv.go
@@ -17,12 +17,12 @@ import (
 	"bytes"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/pd/client"
 	"github.com/pingcap/tidb/config"
 	"github.com/pingcap/tidb/metrics"
 	"github.com/pingcap/tidb/store/tikv/tikvrpc"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/store/tikv/region_cache.go b/store/tikv/region_cache.go
index 381af34c5c6bf..21dd9f2037931 100644
--- a/store/tikv/region_cache.go
+++ b/store/tikv/region_cache.go
@@ -20,11 +20,11 @@ import (
 	"time"
 
 	"github.com/google/btree"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/kvproto/pkg/metapb"
 	"github.com/pingcap/pd/client"
 	"github.com/pingcap/tidb/metrics"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/store/tikv/region_request.go b/store/tikv/region_request.go
index a599b56a9a831..5466ad37032a6 100644
--- a/store/tikv/region_request.go
+++ b/store/tikv/region_request.go
@@ -16,12 +16,12 @@ package tikv
 import (
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/errorpb"
 	"github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/metrics"
 	"github.com/pingcap/tidb/store/tikv/tikvrpc"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 	"google.golang.org/grpc"
diff --git a/store/tikv/region_request_test.go b/store/tikv/region_request_test.go
index fed561fd92288..f48e0f4a484fa 100644
--- a/store/tikv/region_request_test.go
+++ b/store/tikv/region_request_test.go
@@ -20,13 +20,13 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/coprocessor"
 	"github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/kvproto/pkg/tikvpb"
 	"github.com/pingcap/tidb/config"
 	"github.com/pingcap/tidb/store/mockstore/mocktikv"
 	"github.com/pingcap/tidb/store/tikv/tikvrpc"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 )
diff --git a/store/tikv/safepoint.go b/store/tikv/safepoint.go
index ea456c0c23162..4367811760e29 100644
--- a/store/tikv/safepoint.go
+++ b/store/tikv/safepoint.go
@@ -20,7 +20,7 @@ import (
 	"time"
 
 	"github.com/coreos/etcd/clientv3"
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/store/tikv/safepoint_test.go b/store/tikv/safepoint_test.go
index e2142ccf9f1a2..0af5fcaa2ef92 100644
--- a/store/tikv/safepoint_test.go
+++ b/store/tikv/safepoint_test.go
@@ -18,9 +18,9 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/kv"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/store/tikv/scan.go b/store/tikv/scan.go
index ab0ba76bc0e60..93637a0c90589 100644
--- a/store/tikv/scan.go
+++ b/store/tikv/scan.go
@@ -14,10 +14,10 @@
 package tikv
 
 import (
+	"github.com/pingcap/errors"
 	pb "github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/store/tikv/tikvrpc"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/store/tikv/snapshot.go b/store/tikv/snapshot.go
index 730db0273c193..4a3c8c0862e23 100644
--- a/store/tikv/snapshot.go
+++ b/store/tikv/snapshot.go
@@ -20,12 +20,12 @@ import (
 	"time"
 	"unsafe"
 
+	"github.com/pingcap/errors"
 	pb "github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/metrics"
 	"github.com/pingcap/tidb/store/tikv/tikvrpc"
 	"github.com/pingcap/tidb/tablecodec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/store/tikv/split_region.go b/store/tikv/split_region.go
index 8be3e81c52dd3..5d01e3fede123 100644
--- a/store/tikv/split_region.go
+++ b/store/tikv/split_region.go
@@ -16,10 +16,10 @@ package tikv
 import (
 	"bytes"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/store/tikv/tikvrpc"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/store/tikv/store_test.go b/store/tikv/store_test.go
index 00735eee64a3f..8e54767417063 100644
--- a/store/tikv/store_test.go
+++ b/store/tikv/store_test.go
@@ -18,13 +18,13 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	pb "github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/kvproto/pkg/metapb"
 	"github.com/pingcap/pd/client"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/store/mockoracle"
 	"github.com/pingcap/tidb/store/tikv/tikvrpc"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/store/tikv/test_util.go b/store/tikv/test_util.go
index d4efcbbd0bc3e..ffa34637ba0e5 100644
--- a/store/tikv/test_util.go
+++ b/store/tikv/test_util.go
@@ -14,9 +14,9 @@
 package tikv
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/pd/client"
 	"github.com/pingcap/tidb/kv"
-	"github.com/pkg/errors"
 	"github.com/twinj/uuid"
 )
 
diff --git a/store/tikv/ticlient_test.go b/store/tikv/ticlient_test.go
index 1b4ea24ad5c82..e243dc396e7d1 100644
--- a/store/tikv/ticlient_test.go
+++ b/store/tikv/ticlient_test.go
@@ -20,10 +20,10 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/store/mockstore/mocktikv"
 	"github.com/pingcap/tidb/util/codec"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/store/tikv/tikvrpc/tikvrpc.go b/store/tikv/tikvrpc/tikvrpc.go
index 00fe8bcfcbf24..4331f34cf7d3c 100644
--- a/store/tikv/tikvrpc/tikvrpc.go
+++ b/store/tikv/tikvrpc/tikvrpc.go
@@ -18,12 +18,12 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/coprocessor"
 	"github.com/pingcap/kvproto/pkg/errorpb"
 	"github.com/pingcap/kvproto/pkg/kvrpcpb"
 	"github.com/pingcap/kvproto/pkg/metapb"
 	"github.com/pingcap/kvproto/pkg/tikvpb"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/store/tikv/txn.go b/store/tikv/txn.go
index 110135718667a..9b72431a0e07c 100644
--- a/store/tikv/txn.go
+++ b/store/tikv/txn.go
@@ -18,10 +18,10 @@ import (
 	"sync"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/metrics"
 	"github.com/pingcap/tidb/sessionctx"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/structure/hash.go b/structure/hash.go
index 8b04016c37bc1..ecc70b64517a2 100644
--- a/structure/hash.go
+++ b/structure/hash.go
@@ -18,8 +18,8 @@ import (
 	"encoding/binary"
 	"strconv"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/kv"
-	"github.com/pkg/errors"
 )
 
 // HashPair is the pair for (field, value) in a hash.
diff --git a/structure/list.go b/structure/list.go
index ae98232dc670e..24c781e606ebf 100644
--- a/structure/list.go
+++ b/structure/list.go
@@ -16,8 +16,8 @@ package structure
 import (
 	"encoding/binary"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/kv"
-	"github.com/pkg/errors"
 )
 
 type listMeta struct {
diff --git a/structure/string.go b/structure/string.go
index ccf5b67c25cf5..38482d15b9b49 100644
--- a/structure/string.go
+++ b/structure/string.go
@@ -16,8 +16,8 @@ package structure
 import (
 	"strconv"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/kv"
-	"github.com/pkg/errors"
 )
 
 // Set sets the string value of the key.
diff --git a/structure/type.go b/structure/type.go
index 79c58beddba7c..89759269871c9 100644
--- a/structure/type.go
+++ b/structure/type.go
@@ -16,9 +16,9 @@ package structure
 import (
 	"bytes"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/util/codec"
-	"github.com/pkg/errors"
 )
 
 // TypeFlag is for data structure meta/data flag.
diff --git a/table/column.go b/table/column.go
index 9902b83aa07da..67f6d35b6041b 100644
--- a/table/column.go
+++ b/table/column.go
@@ -21,6 +21,7 @@ import (
 	"strings"
 	"unicode/utf8"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/model"
@@ -31,7 +32,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/hack"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/table/tables/gen_expr.go b/table/tables/gen_expr.go
index f0f88e2924cc7..8296d1491c9c4 100644
--- a/table/tables/gen_expr.go
+++ b/table/tables/gen_expr.go
@@ -16,10 +16,10 @@ package tables
 import (
 	"fmt"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
-	"github.com/pkg/errors"
 )
 
 // getDefaultCharsetAndCollate is copyed from ddl/ddl_api.go.
diff --git a/table/tables/index.go b/table/tables/index.go
index e4253d9275537..3f9d77402a2ef 100644
--- a/table/tables/index.go
+++ b/table/tables/index.go
@@ -19,6 +19,7 @@ import (
 	"io"
 	"unicode/utf8"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/kv"
@@ -28,7 +29,6 @@ import (
 	"github.com/pingcap/tidb/tablecodec"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/codec"
-	"github.com/pkg/errors"
 )
 
 // EncodeHandle encodes handle in data.
diff --git a/table/tables/partition.go b/table/tables/partition.go
index efcaf596d7b62..7ad54ef9b1f1a 100644
--- a/table/tables/partition.go
+++ b/table/tables/partition.go
@@ -19,6 +19,7 @@ import (
 	"sort"
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/kv"
@@ -28,7 +29,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/mock"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/table/tables/tables.go b/table/tables/tables.go
index f244991c5d9cd..37dee1163c016 100644
--- a/table/tables/tables.go
+++ b/table/tables/tables.go
@@ -24,6 +24,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/kv"
@@ -39,7 +40,6 @@ import (
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tidb/util/kvcache"
 	binlog "github.com/pingcap/tipb/go-binlog"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"github.com/spaolacci/murmur3"
 	"golang.org/x/net/context"
diff --git a/tablecodec/tablecodec.go b/tablecodec/tablecodec.go
index 3f31f5613a9c3..de9b31c31210e 100644
--- a/tablecodec/tablecodec.go
+++ b/tablecodec/tablecodec.go
@@ -19,13 +19,13 @@ import (
 	"math"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/codec"
-	"github.com/pkg/errors"
 )
 
 var (
diff --git a/terror/terror.go b/terror/terror.go
index c38e0e18a1b24..a5443653d71cd 100644
--- a/terror/terror.go
+++ b/terror/terror.go
@@ -18,8 +18,8 @@ import (
 	"fmt"
 	"strconv"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/terror/terror_test.go b/terror/terror_test.go
index 837ab32f4b2d9..fe93ef4a99fc3 100644
--- a/terror/terror_test.go
+++ b/terror/terror_test.go
@@ -19,8 +19,8 @@ import (
 	"testing"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 )
 
 func TestT(t *testing.T) {
diff --git a/tidb-server/main.go b/tidb-server/main.go
index cbd74b2cbac49..1d24b3279f11e 100644
--- a/tidb-server/main.go
+++ b/tidb-server/main.go
@@ -23,6 +23,7 @@ import (
 	"time"
 
 	"github.com/opentracing/opentracing-go"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/pd/client"
@@ -47,7 +48,6 @@ import (
 	"github.com/pingcap/tidb/util/signal"
 	"github.com/pingcap/tidb/util/systimemon"
 	"github.com/pingcap/tidb/x-server"
-	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/push"
 	log "github.com/sirupsen/logrus"
diff --git a/types/binary_literal.go b/types/binary_literal.go
index da75a5d744807..91d85b98e6559 100644
--- a/types/binary_literal.go
+++ b/types/binary_literal.go
@@ -22,8 +22,8 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
-	"github.com/pkg/errors"
 )
 
 // BinaryLiteral is the internal type for storing bit / hex literal type.
diff --git a/types/convert.go b/types/convert.go
index 50fb7175be725..046a6c6488516 100644
--- a/types/convert.go
+++ b/types/convert.go
@@ -22,12 +22,12 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/hack"
-	"github.com/pkg/errors"
 )
 
 func truncateStr(str string, flen int) string {
diff --git a/types/convert_test.go b/types/convert_test.go
index a45bc18a1b985..4d6244fac8ea9 100644
--- a/types/convert_test.go
+++ b/types/convert_test.go
@@ -20,13 +20,13 @@ import (
 	"time"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 )
 
 var _ = Suite(&testTypeConvertSuite{})
diff --git a/types/datum.go b/types/datum.go
index c6d4643c4c40a..09607c474d9b4 100644
--- a/types/datum.go
+++ b/types/datum.go
@@ -22,13 +22,13 @@ import (
 	"time"
 	"unicode/utf8"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/hack"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/types/datum_eval.go b/types/datum_eval.go
index 9cbdaa4fa84fa..a2d4d744b4d60 100644
--- a/types/datum_eval.go
+++ b/types/datum_eval.go
@@ -15,8 +15,8 @@ package types
 
 import (
 	"github.com/cznic/mathutil"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/opcode"
-	"github.com/pkg/errors"
 )
 
 // ComputePlus computes the result of a+b.
diff --git a/types/enum.go b/types/enum.go
index 085e9b31874de..45c15a3d2208f 100644
--- a/types/enum.go
+++ b/types/enum.go
@@ -17,7 +17,7 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 )
 
 // Enum is for MySQL enum type.
diff --git a/types/etc.go b/types/etc.go
index 626139a7d328a..b8b5af64f38d5 100644
--- a/types/etc.go
+++ b/types/etc.go
@@ -20,12 +20,12 @@ package types
 import (
 	"io"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/opcode"
 	"github.com/pingcap/parser/terror"
 	ast "github.com/pingcap/parser/types"
-	"github.com/pkg/errors"
 )
 
 // IsTypeBlob returns a boolean indicating whether the tp is a blob type.
diff --git a/types/fsp.go b/types/fsp.go
index 69dd32c352a0e..fe5a656cd87bb 100644
--- a/types/fsp.go
+++ b/types/fsp.go
@@ -18,7 +18,7 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 )
 
 const (
diff --git a/types/helper.go b/types/helper.go
index ec95d824d2f1e..f03dc1390c6de 100644
--- a/types/helper.go
+++ b/types/helper.go
@@ -18,7 +18,7 @@ import (
 	"strings"
 	"unicode"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 )
 
 // RoundFloat rounds float val to the nearest integer value with float64 format, like MySQL Round function.
diff --git a/types/helper_test.go b/types/helper_test.go
index 4a18f650af5da..fa39980252901 100644
--- a/types/helper_test.go
+++ b/types/helper_test.go
@@ -17,7 +17,7 @@ import (
 	"strconv"
 
 	. "github.com/pingcap/check"
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 )
 
 var _ = Suite(&testTypeHelperSuite{})
diff --git a/types/json/binary.go b/types/json/binary.go
index 182c08dcd4683..c5c277d451cba 100644
--- a/types/json/binary.go
+++ b/types/json/binary.go
@@ -25,9 +25,9 @@ import (
 	"strings"
 	"unicode/utf8"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/util/hack"
-	"github.com/pkg/errors"
 )
 
 /*
diff --git a/types/json/binary_functions.go b/types/json/binary_functions.go
index 689dbad3768fd..3719367f042b8 100644
--- a/types/json/binary_functions.go
+++ b/types/json/binary_functions.go
@@ -22,8 +22,8 @@ import (
 	"unicode/utf8"
 	"unsafe"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/util/hack"
-	"github.com/pkg/errors"
 )
 
 // Type returns type of BinaryJSON as string.
diff --git a/types/json/path_expr.go b/types/json/path_expr.go
index b58bf9f2729ae..7ed5276231ae8 100644
--- a/types/json/path_expr.go
+++ b/types/json/path_expr.go
@@ -18,7 +18,7 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 )
 
 /*
diff --git a/types/mydecimal.go b/types/mydecimal.go
index dec19cfee333d..afb34eca3523f 100644
--- a/types/mydecimal.go
+++ b/types/mydecimal.go
@@ -17,9 +17,9 @@ import (
 	"math"
 	"strconv"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
-	"github.com/pkg/errors"
 )
 
 // RoundMode is the type for round mode.
diff --git a/types/mytime.go b/types/mytime.go
index 0f546bf940913..6c9564dcbac49 100644
--- a/types/mytime.go
+++ b/types/mytime.go
@@ -16,7 +16,7 @@ package types
 import (
 	gotime "time"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 )
 
 // MysqlTime is the internal struct type for Time.
diff --git a/types/overflow.go b/types/overflow.go
index 1be3742c29cc2..6253357cbe047 100644
--- a/types/overflow.go
+++ b/types/overflow.go
@@ -17,7 +17,7 @@ import (
 	"fmt"
 	"math"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 )
 
 // AddUint64 adds uint64 a and b if no overflow, else returns error.
diff --git a/types/set.go b/types/set.go
index 97d065e404160..0a337780c452f 100644
--- a/types/set.go
+++ b/types/set.go
@@ -17,7 +17,7 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 )
 
 var zeroSet = Set{Name: "", Value: 0}
diff --git a/types/time.go b/types/time.go
index c2694b2cd7ff1..e257682299eb8 100644
--- a/types/time.go
+++ b/types/time.go
@@ -23,10 +23,10 @@ import (
 	gotime "time"
 	"unicode"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/util/admin/admin.go b/util/admin/admin.go
index a1985bd09a82c..e49fb2ee9f8d1 100644
--- a/util/admin/admin.go
+++ b/util/admin/admin.go
@@ -19,6 +19,7 @@ import (
 	"sort"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
@@ -34,7 +35,6 @@ import (
 	"github.com/pingcap/tidb/util"
 	"github.com/pingcap/tidb/util/rowDecoder"
 	"github.com/pingcap/tidb/util/sqlexec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/util/chunk/list.go b/util/chunk/list.go
index 4acee7d199216..e7a939c69c70c 100644
--- a/util/chunk/list.go
+++ b/util/chunk/list.go
@@ -14,9 +14,9 @@
 package chunk
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/memory"
-	"github.com/pkg/errors"
 )
 
 // List holds a slice of chunks, use to append rows with max chunk size properly handled.
diff --git a/util/codec/bytes.go b/util/codec/bytes.go
index 0d988c4c69883..b590b7fa90221 100644
--- a/util/codec/bytes.go
+++ b/util/codec/bytes.go
@@ -18,7 +18,7 @@ import (
 	"runtime"
 	"unsafe"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 )
 
 const (
diff --git a/util/codec/codec.go b/util/codec/codec.go
index 80839b5ca5340..fae2935538246 100644
--- a/util/codec/codec.go
+++ b/util/codec/codec.go
@@ -17,13 +17,13 @@ import (
 	"encoding/binary"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 // First byte in the encoded value which specifies the encoding type.
diff --git a/util/codec/decimal.go b/util/codec/decimal.go
index ed61aa1d5b752..8fcb849c70d23 100644
--- a/util/codec/decimal.go
+++ b/util/codec/decimal.go
@@ -14,8 +14,8 @@
 package codec
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/types"
-	"github.com/pkg/errors"
 )
 
 // EncodeDecimal encodes a decimal into a byte slice which can be sorted lexicographically later.
diff --git a/util/codec/float.go b/util/codec/float.go
index bf846b867c6c8..39ce634459cc6 100644
--- a/util/codec/float.go
+++ b/util/codec/float.go
@@ -16,7 +16,7 @@ package codec
 import (
 	"math"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 )
 
 func encodeFloatToCmpUint64(f float64) uint64 {
diff --git a/util/codec/number.go b/util/codec/number.go
index d23117fa3ac10..47912e813b2fc 100644
--- a/util/codec/number.go
+++ b/util/codec/number.go
@@ -17,7 +17,7 @@ import (
 	"encoding/binary"
 	"math"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 )
 
 const signMask uint64 = 0x8000000000000000
diff --git a/util/encrypt/aes.go b/util/encrypt/aes.go
index b1b90f3a524b8..76f93f60a5afa 100644
--- a/util/encrypt/aes.go
+++ b/util/encrypt/aes.go
@@ -18,7 +18,7 @@ import (
 	"crypto/aes"
 	"crypto/cipher"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 )
 
 type ecb struct {
diff --git a/util/filesort/filesort.go b/util/filesort/filesort.go
index 5b61cc904b7c2..e87d9430ee394 100644
--- a/util/filesort/filesort.go
+++ b/util/filesort/filesort.go
@@ -25,11 +25,11 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/codec"
-	"github.com/pkg/errors"
 )
 
 type comparableRow struct {
diff --git a/util/kvencoder/kv_encoder.go b/util/kvencoder/kv_encoder.go
index 9184e0d439aec..c5ab7cc32f947 100644
--- a/util/kvencoder/kv_encoder.go
+++ b/util/kvencoder/kv_encoder.go
@@ -20,6 +20,7 @@ import (
 	"sync"
 	"sync/atomic"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/domain"
 	"github.com/pingcap/tidb/kv"
@@ -28,7 +29,6 @@ import (
 	"github.com/pingcap/tidb/session"
 	"github.com/pingcap/tidb/store/mockstore"
 	"github.com/pingcap/tidb/tablecodec"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
diff --git a/util/kvencoder/kv_encoder_test.go b/util/kvencoder/kv_encoder_test.go
index 557dcc10fc475..55813a7fa83cc 100644
--- a/util/kvencoder/kv_encoder_test.go
+++ b/util/kvencoder/kv_encoder_test.go
@@ -24,6 +24,7 @@ import (
 	"github.com/pingcap/tidb/store/mockstore"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/domain"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/session"
@@ -34,7 +35,6 @@ import (
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tidb/util/testkit"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 )
 
 var _ = Suite(&testKvEncoderSuite{})
diff --git a/util/logutil/log.go b/util/logutil/log.go
index d9681cd56009b..342f1d5b951bf 100644
--- a/util/logutil/log.go
+++ b/util/logutil/log.go
@@ -22,7 +22,7 @@ import (
 	"sort"
 	"strings"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 	log "github.com/sirupsen/logrus"
 	"gopkg.in/natefinch/lumberjack.v2"
 )
diff --git a/util/misc.go b/util/misc.go
index e34ee06e51bd4..3060f610c687d 100644
--- a/util/misc.go
+++ b/util/misc.go
@@ -17,7 +17,7 @@ import (
 	"runtime"
 	"time"
 
-	"github.com/pkg/errors"
+	"github.com/pingcap/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/util/misc_test.go b/util/misc_test.go
index 517b34909f295..5060d25278ada 100644
--- a/util/misc_test.go
+++ b/util/misc_test.go
@@ -15,8 +15,8 @@ package util
 
 import (
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 )
 
 var _ = Suite(&testMiscSuite{})
diff --git a/util/mock/context.go b/util/mock/context.go
index e33879460288b..198584c92b322 100644
--- a/util/mock/context.go
+++ b/util/mock/context.go
@@ -19,6 +19,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/owner"
 	"github.com/pingcap/tidb/sessionctx"
@@ -28,7 +29,6 @@ import (
 	"github.com/pingcap/tidb/util/kvcache"
 	"github.com/pingcap/tidb/util/sqlexec"
 	binlog "github.com/pingcap/tipb/go-binlog"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/util/prefix_helper.go b/util/prefix_helper.go
index ccfd1ece9d633..3fc172b02d783 100644
--- a/util/prefix_helper.go
+++ b/util/prefix_helper.go
@@ -20,8 +20,8 @@ package util
 import (
 	"bytes"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/kv"
-	"github.com/pkg/errors"
 )
 
 // ScanMetaWithPrefix scans metadata with the prefix.
diff --git a/util/ranger/detacher.go b/util/ranger/detacher.go
index 529f4cb92c9a8..6180beee2066c 100644
--- a/util/ranger/detacher.go
+++ b/util/ranger/detacher.go
@@ -14,12 +14,12 @@
 package ranger
 
 import (
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/sessionctx"
 	"github.com/pingcap/tidb/types"
-	"github.com/pkg/errors"
 )
 
 // detachColumnCNFConditions detaches the condition for calculating range from the other conditions.
diff --git a/util/ranger/points.go b/util/ranger/points.go
index 0b830545e578f..db07588a861f6 100644
--- a/util/ranger/points.go
+++ b/util/ranger/points.go
@@ -18,6 +18,7 @@ import (
 	"math"
 	"sort"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
@@ -25,7 +26,6 @@ import (
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 // Error instances.
diff --git a/util/ranger/ranger.go b/util/ranger/ranger.go
index 5631c1ff7c995..0402209e25bb7 100644
--- a/util/ranger/ranger.go
+++ b/util/ranger/ranger.go
@@ -19,6 +19,7 @@ import (
 	"sort"
 	"unicode/utf8"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/ast"
 	"github.com/pingcap/parser/charset"
 	"github.com/pingcap/parser/mysql"
@@ -28,7 +29,6 @@ import (
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/codec"
-	"github.com/pkg/errors"
 )
 
 func validInterval(sc *stmtctx.StatementContext, low, high point) (bool, error) {
diff --git a/util/ranger/ranger_test.go b/util/ranger/ranger_test.go
index 8947aec481cc5..03be414c29e3f 100644
--- a/util/ranger/ranger_test.go
+++ b/util/ranger/ranger_test.go
@@ -18,6 +18,7 @@ import (
 	"testing"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser"
 	"github.com/pingcap/tidb/domain"
 	"github.com/pingcap/tidb/expression"
@@ -31,7 +32,6 @@ import (
 	"github.com/pingcap/tidb/util/ranger"
 	"github.com/pingcap/tidb/util/testkit"
 	"github.com/pingcap/tidb/util/testleak"
-	"github.com/pkg/errors"
 )
 
 func TestT(t *testing.T) {
diff --git a/util/ranger/types.go b/util/ranger/types.go
index c17964845d25d..5db46355353db 100644
--- a/util/ranger/types.go
+++ b/util/ranger/types.go
@@ -18,9 +18,9 @@ import (
 	"math"
 	"strings"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
-	"github.com/pkg/errors"
 )
 
 // Range represents a range generated in physical plan building phase.
diff --git a/util/rowDecoder/decoder.go b/util/rowDecoder/decoder.go
index 86d69fa1e457f..bd4d778b91b81 100644
--- a/util/rowDecoder/decoder.go
+++ b/util/rowDecoder/decoder.go
@@ -16,6 +16,7 @@ package decoder
 import (
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/expression"
@@ -24,7 +25,6 @@ import (
 	"github.com/pingcap/tidb/tablecodec"
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pkg/errors"
 )
 
 // Column contains the info and generated expr of column.
diff --git a/util/stringutil/string_util.go b/util/stringutil/string_util.go
index 6aa22b36736ff..4bdf43fda7e14 100644
--- a/util/stringutil/string_util.go
+++ b/util/stringutil/string_util.go
@@ -17,8 +17,8 @@ import (
 	"strings"
 	"unicode/utf8"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/util/hack"
-	"github.com/pkg/errors"
 )
 
 // ErrSyntax indicates that a value does not have the right syntax for the target type.
diff --git a/util/testkit/testkit.go b/util/testkit/testkit.go
index cea25aab3ef75..cdb76a65f14b3 100644
--- a/util/testkit/testkit.go
+++ b/util/testkit/testkit.go
@@ -20,11 +20,11 @@ import (
 	"sync/atomic"
 
 	"github.com/pingcap/check"
+	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/session"
 	"github.com/pingcap/tidb/util/sqlexec"
 	"github.com/pingcap/tidb/util/testutil"
-	"github.com/pkg/errors"
 	"golang.org/x/net/context"
 )
 
diff --git a/x-server/conn.go b/x-server/conn.go
index 940c6b09cfc8f..d06931bbb032f 100644
--- a/x-server/conn.go
+++ b/x-server/conn.go
@@ -17,9 +17,9 @@ import (
 	"io"
 	"net"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/util/arena"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
diff --git a/x-server/server.go b/x-server/server.go
index 5b1c9f7650ebb..cdb7ab78c3cd8 100644
--- a/x-server/server.go
+++ b/x-server/server.go
@@ -20,12 +20,12 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/server"
 	"github.com/pingcap/tidb/util"
 	"github.com/pingcap/tidb/util/arena"
-	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )