diff --git a/cpp-ch/local-engine/Parser/SerializedPlanParser.h b/cpp-ch/local-engine/Parser/SerializedPlanParser.h
index 6ce92b558b739..d1f9cb845ed8d 100644
--- a/cpp-ch/local-engine/Parser/SerializedPlanParser.h
+++ b/cpp-ch/local-engine/Parser/SerializedPlanParser.h
@@ -133,7 +133,6 @@ static const std::map<std::string, std::string> SCALAR_FUNCTIONS
        {"replace", "replaceAll"},
        {"regexp_replace", "replaceRegexpAll"},
        {"regexp_extract_all", "regexpExtractAllSpark"},
-       {"chr", "char"},
        {"rlike", "match"},
        {"ascii", "ascii"},
        {"split", "splitByRegexp"},
diff --git a/gluten-ut/spark32/src/test/scala/org/apache/gluten/utils/clickhouse/ClickHouseTestSettings.scala b/gluten-ut/spark32/src/test/scala/org/apache/gluten/utils/clickhouse/ClickHouseTestSettings.scala
index d12a40b764f80..3048c3f9cab50 100644
--- a/gluten-ut/spark32/src/test/scala/org/apache/gluten/utils/clickhouse/ClickHouseTestSettings.scala
+++ b/gluten-ut/spark32/src/test/scala/org/apache/gluten/utils/clickhouse/ClickHouseTestSettings.scala
@@ -897,7 +897,6 @@ class ClickHouseTestSettings extends BackendTestSettings {
     .exclude("Substring")
     .exclude("string substring_index function")
     .exclude("ascii for string")
-    .exclude("string for ascii")
     .exclude("base64/unbase64 for string")
     .exclude("encode/decode for string")
     .exclude("overlay for string")
diff --git a/gluten-ut/spark33/src/test/scala/org/apache/gluten/utils/clickhouse/ClickHouseTestSettings.scala b/gluten-ut/spark33/src/test/scala/org/apache/gluten/utils/clickhouse/ClickHouseTestSettings.scala
index 52e7ebcbda499..769707d4eb5f6 100644
--- a/gluten-ut/spark33/src/test/scala/org/apache/gluten/utils/clickhouse/ClickHouseTestSettings.scala
+++ b/gluten-ut/spark33/src/test/scala/org/apache/gluten/utils/clickhouse/ClickHouseTestSettings.scala
@@ -857,7 +857,6 @@ class ClickHouseTestSettings extends BackendTestSettings {
     .exclude("string substring_index function")
     .exclude("SPARK-40213: ascii for Latin-1 Supplement characters")
     .exclude("ascii for string")
-    .exclude("string for ascii")
     .exclude("base64/unbase64 for string")
     .exclude("encode/decode for string")
     .exclude("overlay for string")
diff --git a/gluten-ut/spark34/src/test/scala/org/apache/gluten/utils/clickhouse/ClickHouseTestSettings.scala b/gluten-ut/spark34/src/test/scala/org/apache/gluten/utils/clickhouse/ClickHouseTestSettings.scala
index 38ed2c53463b7..268f22fe69814 100644
--- a/gluten-ut/spark34/src/test/scala/org/apache/gluten/utils/clickhouse/ClickHouseTestSettings.scala
+++ b/gluten-ut/spark34/src/test/scala/org/apache/gluten/utils/clickhouse/ClickHouseTestSettings.scala
@@ -760,7 +760,6 @@ class ClickHouseTestSettings extends BackendTestSettings {
     .exclude("string substring_index function")
     .exclude("SPARK-40213: ascii for Latin-1 Supplement characters")
     .exclude("ascii for string")
-    .exclude("string for ascii")
     .exclude("base64/unbase64 for string")
     .exclude("encode/decode for string")
     .exclude("Levenshtein distance")
diff --git a/gluten-ut/spark35/src/test/scala/org/apache/gluten/utils/clickhouse/ClickHouseTestSettings.scala b/gluten-ut/spark35/src/test/scala/org/apache/gluten/utils/clickhouse/ClickHouseTestSettings.scala
index 38ed2c53463b7..268f22fe69814 100644
--- a/gluten-ut/spark35/src/test/scala/org/apache/gluten/utils/clickhouse/ClickHouseTestSettings.scala
+++ b/gluten-ut/spark35/src/test/scala/org/apache/gluten/utils/clickhouse/ClickHouseTestSettings.scala
@@ -760,7 +760,6 @@ class ClickHouseTestSettings extends BackendTestSettings {
     .exclude("string substring_index function")
     .exclude("SPARK-40213: ascii for Latin-1 Supplement characters")
     .exclude("ascii for string")
-    .exclude("string for ascii")
     .exclude("base64/unbase64 for string")
     .exclude("encode/decode for string")
     .exclude("Levenshtein distance")