Exec support builder (go-xorm#1064)

engine.go

@@ -1333,10 +1333,10 @@ func (engine *Engine) DropIndexes(bean interface{}) error {
 }
 
 // Exec raw sql
-func (engine *Engine) Exec(sql string, args ...interface{}) (sql.Result, error) {
+func (engine *Engine) Exec(sqlorArgs ...interface{}) (sql.Result, error) {
 	session := engine.NewSession()
 	defer session.Close()
-	return session.Exec(sql, args...)
+	return session.Exec(sqlorArgs...)
 }
 
 // Query a raw sql and return records as []map[string][]byte

interface.go

@@ -27,7 +27,7 @@ type Interface interface {
 	Delete(interface{}) (int64, error)
 	Distinct(columns ...string) *Session
 	DropIndexes(bean interface{}) error
-	Exec(string, ...interface{}) (sql.Result, error)
+	Exec(sqlOrAgrs ...interface{}) (sql.Result, error)
 	Exist(bean ...interface{}) (bool, error)
 	Find(interface{}, ...interface{}) error
 	FindAndCount(interface{}, ...interface{}) (int64, error)

session_query.go

@@ -17,17 +17,7 @@ import (
 
 func (session *Session) genQuerySQL(sqlorArgs ...interface{}) (string, []interface{}, error) {
 	if len(sqlorArgs) > 0 {
-		switch sqlorArgs[0].(type) {
-		case string:
-			return sqlorArgs[0].(string), sqlorArgs[1:], nil
-		case *builder.Builder:
-			return sqlorArgs[0].(*builder.Builder).ToSQL()
-		case builder.Builder:
-			bd := sqlorArgs[0].(builder.Builder)
-			return bd.ToSQL()
-		default:
-			return "", nil, ErrUnSupportedType
-		}
+		return convertSQLOrArgs(sqlorArgs...)
 	}
 
 	if session.statement.RawSQL != "" {

session_raw.go

@@ -9,6 +9,7 @@ import (
 	"reflect"
 	"time"
 
+	"github.com/go-xorm/builder"
 	"github.com/go-xorm/core"
 )
 
@@ -193,11 +194,34 @@ func (session *Session) exec(sqlStr string, args ...interface{}) (sql.Result, er
 	return session.DB().Exec(sqlStr, args...)
 }
 
+func convertSQLOrArgs(sqlorArgs ...interface{}) (string, []interface{}, error) {
+	switch sqlorArgs[0].(type) {
+	case string:
+		return sqlorArgs[0].(string), sqlorArgs[1:], nil
+	case *builder.Builder:
+		return sqlorArgs[0].(*builder.Builder).ToSQL()
+	case builder.Builder:
+		bd := sqlorArgs[0].(builder.Builder)
+		return bd.ToSQL()
+	}
+
+	return "", nil, ErrUnSupportedType
+}
+
 // Exec raw sql
-func (session *Session) Exec(sqlStr string, args ...interface{}) (sql.Result, error) {
+func (session *Session) Exec(sqlorArgs ...interface{}) (sql.Result, error) {
 	if session.isAutoClose {
 		defer session.Close()
 	}
 
+	if len(sqlorArgs) == 0 {
+		return nil, ErrUnSupportedType
+	}
+
+	sqlStr, args, err := convertSQLOrArgs(sqlorArgs...)
+	if err != nil {
+		return nil, err
+	}
+
 	return session.exec(sqlStr, args...)
 }