diff --git a/src/sql/engine/expr/ob_expr_merge_result_type.map b/src/sql/engine/expr/ob_expr_merge_result_type.map
index 70f4b3770d..56e1bdc31b 100644
--- a/src/sql/engine/expr/ob_expr_merge_result_type.map
+++ b/src/sql/engine/expr/ob_expr_merge_result_type.map
@@ -55,16 +55,16 @@ static ObObjType MERGE_RESULT_TYPE[ObMaxType][ObMaxType] = {
     /*TinyIntType*/
     {
         ObTinyIntType,    /*TinyIntType=>NullType  */
-        ObTinyIntType,    /*TinyIntType=>TinyIntType  */
-        ObSmallIntType,   /*TinyIntType=>SmallIntType  */
-        ObMediumIntType,  /*TinyIntType=>MediumIntType  */
+        ObInt32Type,      /*TinyIntType=>TinyIntType  */
+        ObInt32Type,      /*TinyIntType=>SmallIntType  */
+        ObInt32Type,      /*TinyIntType=>MediumIntType  */
         ObInt32Type,      /*TinyIntType=>Int32Type  */
         ObIntType,        /*TinyIntType=>IntType  */
-        ObTinyIntType,    /*TinyIntType=>UTinyIntType  */
-        ObSmallIntType,   /*TinyIntType=>USmallIntType  */
-        ObMediumIntType,  /*TinyIntType=>UMediumIntType  */
-        ObInt32Type,      /*TinyIntType=>UInt32Type  */
-        ObIntType,        /*TinyIntType=>UIntType  */
+        ObInt32Type,      /*TinyIntType=>UTinyIntType  */
+        ObInt32Type,      /*TinyIntType=>USmallIntType  */
+        ObInt32Type,      /*TinyIntType=>UMediumIntType  */
+        ObIntType,        /*TinyIntType=>UInt32Type  */
+        ObNumberType,     /*TinyIntType=>UIntType  */
         ObFloatType,      /*TinyIntType=>FloatType  */
         ObDoubleType,     /*TinyIntType=>DoubleType  */
         ObFloatType,      /*TinyIntType=>UFloatType  */
@@ -108,16 +108,16 @@ static ObObjType MERGE_RESULT_TYPE[ObMaxType][ObMaxType] = {
     /*SmallIntType*/
     {
         ObSmallIntType,   /*SmallIntType=>NullType  */
-        ObSmallIntType,   /*SmallIntType=>TinyIntType  */
-        ObSmallIntType,   /*SmallIntType=>SmallIntType  */
-        ObMediumIntType,  /*SmallIntType=>MediumIntType  */
+        ObInt32Type,      /*SmallIntType=>TinyIntType  */
+        ObInt32Type,      /*SmallIntType=>SmallIntType  */
+        ObInt32Type,      /*SmallIntType=>MediumIntType  */
         ObInt32Type,      /*SmallIntType=>Int32Type  */
         ObIntType,        /*SmallIntType=>IntType  */
-        ObSmallIntType,   /*SmallIntType=>UTinyIntType  */
-        ObSmallIntType,   /*SmallIntType=>USmallIntType  */
-        ObMediumIntType,  /*SmallIntType=>UMediumIntType  */
-        ObInt32Type,      /*SmallIntType=>UInt32Type  */
-        ObIntType,        /*SmallIntType=>UIntType  */
+        ObInt32Type,      /*SmallIntType=>UTinyIntType  */
+        ObInt32Type,      /*SmallIntType=>USmallIntType  */
+        ObInt32Type,      /*SmallIntType=>UMediumIntType  */
+        ObIntType,        /*SmallIntType=>UInt32Type  */
+        ObNumberType,     /*SmallIntType=>UIntType  */
         ObFloatType,      /*SmallIntType=>FloatType  */
         ObDoubleType,     /*SmallIntType=>DoubleType  */
         ObFloatType,      /*SmallIntType=>UFloatType  */
@@ -161,16 +161,16 @@ static ObObjType MERGE_RESULT_TYPE[ObMaxType][ObMaxType] = {
     /*MediumIntType*/
     {
         ObMediumIntType,  /*MediumIntType=>NullType  */
-        ObMediumIntType,  /*MediumIntType=>TinyIntType  */
-        ObMediumIntType,  /*MediumIntType=>SmallIntType  */
-        ObMediumIntType,  /*MediumIntType=>MediumIntType  */
+        ObInt32Type,      /*MediumIntType=>TinyIntType  */
+        ObInt32Type,      /*MediumIntType=>SmallIntType  */
+        ObInt32Type,      /*MediumIntType=>MediumIntType  */
         ObInt32Type,      /*MediumIntType=>Int32Type  */
         ObIntType,        /*MediumIntType=>IntType  */
-        ObMediumIntType,  /*MediumIntType=>UTinyIntType  */
-        ObMediumIntType,  /*MediumIntType=>USmallIntType  */
-        ObMediumIntType,  /*MediumIntType=>UMediumIntType  */
-        ObInt32Type,      /*MediumIntType=>UInt32Type  */
-        ObIntType,        /*MediumIntType=>UIntType  */
+        ObInt32Type,      /*MediumIntType=>UTinyIntType  */
+        ObInt32Type,      /*MediumIntType=>USmallIntType  */
+        ObInt32Type,      /*MediumIntType=>UMediumIntType  */
+        ObIntType,        /*MediumIntType=>UInt32Type  */
+        ObNumberType,     /*MediumIntType=>UIntType  */
         ObFloatType,      /*MediumIntType=>FloatType  */
         ObDoubleType,     /*MediumIntType=>DoubleType  */
         ObFloatType,      /*MediumIntType=>UFloatType  */
@@ -222,8 +222,8 @@ static ObObjType MERGE_RESULT_TYPE[ObMaxType][ObMaxType] = {
         ObInt32Type,      /*Int32Type=>UTinyIntType  */
         ObInt32Type,      /*Int32Type=>USmallIntType  */
         ObInt32Type,      /*Int32Type=>UMediumIntType  */
-        ObInt32Type,      /*Int32Type=>UInt32Type  */
-        ObIntType,        /*Int32Type=>UIntType  */
+        ObIntType,        /*Int32Type=>UInt32Type  */
+        ObNumberType,     /*Int32Type=>UIntType  */
         ObDoubleType,     /*Int32Type=>FloatType  */
         ObDoubleType,     /*Int32Type=>DoubleType  */
         ObDoubleType,     /*Int32Type=>UFloatType  */
@@ -269,12 +269,12 @@ static ObObjType MERGE_RESULT_TYPE[ObMaxType][ObMaxType] = {
         ObIntType,        /*IntType=>NullType  */
         ObIntType,        /*IntType=>TinyIntType  */
         ObIntType,        /*IntType=>SmallIntType  */
-        ObInt32Type,      /*IntType=>MediumIntType  */
+        ObIntType,        /*IntType=>MediumIntType  */
         ObIntType,        /*IntType=>Int32Type  */
         ObIntType,        /*IntType=>IntType  */
         ObIntType,        /*IntType=>UTinyIntType  */
         ObIntType,        /*IntType=>USmallIntType  */
-        ObInt32Type,      /*IntType=>UMediumIntType  */
+        ObIntType,        /*IntType=>UMediumIntType  */
         ObIntType,        /*IntType=>UInt32Type  */
         ObNumberType,     /*IntType=>UIntType  */
         ObDoubleType,     /*IntType=>FloatType  */
@@ -319,15 +319,15 @@ static ObObjType MERGE_RESULT_TYPE[ObMaxType][ObMaxType] = {
 
     /*UTinyIntType*/
     {
-        ObUTinyIntType,    /*UTinyIntType=>NullType  */
-        ObTinyIntType,    /*UTinyIntType=>TinyIntType  */
-        ObSmallIntType,   /*UTinyIntType=>SmallIntType  */
-        ObMediumIntType,  /*UTinyIntType=>MediumIntType  */
+        ObUTinyIntType,   /*UTinyIntType=>NullType  */
+        ObInt32Type,      /*UTinyIntType=>TinyIntType  */
+        ObInt32Type,      /*UTinyIntType=>SmallIntType  */
+        ObInt32Type,      /*UTinyIntType=>MediumIntType  */
         ObInt32Type,      /*UTinyIntType=>Int32Type  */
         ObIntType,        /*UTinyIntType=>IntType  */
-        ObUTinyIntType,   /*UTinyIntType=>UTinyIntType  */
-        ObUSmallIntType,  /*UTinyIntType=>USmallIntType  */
-        ObUMediumIntType, /*UTinyIntType=>UMediumIntType  */
+        ObUInt32Type,     /*UTinyIntType=>UTinyIntType  */
+        ObUInt32Type,     /*UTinyIntType=>USmallIntType  */
+        ObUInt32Type,     /*UTinyIntType=>UMediumIntType  */
         ObUInt32Type,     /*UTinyIntType=>UInt32Type  */
         ObUInt64Type,     /*UTinyIntType=>UIntType  */
         ObFloatType,      /*UTinyIntType=>FloatType  */
@@ -373,14 +373,14 @@ static ObObjType MERGE_RESULT_TYPE[ObMaxType][ObMaxType] = {
     /*USmallIntType*/
     {
         ObUSmallIntType,   /*USmallIntType=>NullType  */
-        ObSmallIntType,   /*USmallIntType=>TinyIntType  */
-        ObSmallIntType,   /*USmallIntType=>SmallIntType  */
-        ObMediumIntType,  /*USmallIntType=>MediumIntType  */
+        ObInt32Type,      /*USmallIntType=>TinyIntType  */
+        ObInt32Type,      /*USmallIntType=>SmallIntType  */
+        ObInt32Type,      /*USmallIntType=>MediumIntType  */
         ObInt32Type,      /*USmallIntType=>Int32Type  */
         ObIntType,        /*USmallIntType=>IntType  */
-        ObUSmallIntType,  /*USmallIntType=>UTinyIntType  */
-        ObUSmallIntType,  /*USmallIntType=>USmallIntType  */
-        ObUMediumIntType, /*USmallIntType=>UMediumIntType  */
+        ObUInt32Type,     /*USmallIntType=>UTinyIntType  */
+        ObUInt32Type,     /*USmallIntType=>USmallIntType  */
+        ObUInt32Type,     /*USmallIntType=>UMediumIntType  */
         ObUInt32Type,     /*USmallIntType=>UInt32Type  */
         ObUInt64Type,     /*USmallIntType=>UIntType  */
         ObFloatType,      /*USmallIntType=>FloatType  */
@@ -426,14 +426,14 @@ static ObObjType MERGE_RESULT_TYPE[ObMaxType][ObMaxType] = {
     /*UMediumIntType*/
     {
         ObUMediumIntType,  /*UMediumIntType=>NullType  */
-        ObMediumIntType,  /*UMediumIntType=>TinyIntType  */
-        ObMediumIntType,  /*UMediumIntType=>SmallIntType  */
-        ObMediumIntType,  /*UMediumIntType=>MediumIntType  */
+        ObInt32Type,      /*UMediumIntType=>TinyIntType  */
+        ObInt32Type,      /*UMediumIntType=>SmallIntType  */
+        ObInt32Type,      /*UMediumIntType=>MediumIntType  */
         ObInt32Type,      /*UMediumIntType=>Int32Type  */
         ObIntType,        /*UMediumIntType=>IntType  */
-        ObUMediumIntType, /*UMediumIntType=>UTinyIntType  */
-        ObUMediumIntType, /*UMediumIntType=>USmallIntType  */
-        ObUMediumIntType, /*UMediumIntType=>UMediumIntType  */
+        ObUInt32Type,     /*UMediumIntType=>UTinyIntType  */
+        ObUInt32Type,     /*UMediumIntType=>USmallIntType  */
+        ObUInt32Type,     /*UMediumIntType=>UMediumIntType  */
         ObUInt32Type,     /*UMediumIntType=>UInt32Type  */
         ObUInt64Type,     /*UMediumIntType=>UIntType  */
         ObFloatType,      /*UMediumIntType=>FloatType  */
@@ -478,11 +478,11 @@ static ObObjType MERGE_RESULT_TYPE[ObMaxType][ObMaxType] = {
 
     /*UInt32Type*/
     {
-        ObUInt32Type,      /*UInt32Type=>NullType  */
-        ObInt32Type,      /*UInt32Type=>TinyIntType  */
-        ObInt32Type,      /*UInt32Type=>SmallIntType  */
-        ObInt32Type,      /*UInt32Type=>MediumIntType  */
-        ObInt32Type,      /*UInt32Type=>Int32Type  */
+        ObUInt32Type,     /*UInt32Type=>NullType  */
+        ObIntType,        /*UInt32Type=>TinyIntType  */
+        ObIntType,        /*UInt32Type=>SmallIntType  */
+        ObIntType,        /*UInt32Type=>MediumIntType  */
+        ObIntType,        /*UInt32Type=>Int32Type  */
         ObIntType,        /*UInt32Type=>IntType  */
         ObUInt32Type,     /*UInt32Type=>UTinyIntType  */
         ObUInt32Type,     /*UInt32Type=>USmallIntType  */
@@ -531,15 +531,15 @@ static ObObjType MERGE_RESULT_TYPE[ObMaxType][ObMaxType] = {
 
     /*UIntType*/
     {
-        ObUInt64Type,        /*UIntType=>NullType  */
-        ObIntType,        /*UIntType=>TinyIntType  */
-        ObIntType,        /*UIntType=>SmallIntType  */
-        ObInt32Type,      /*UIntType=>MediumIntType  */
-        ObIntType,        /*UIntType=>Int32Type  */
+        ObUInt64Type,     /*UIntType=>NullType  */
+        ObNumberType,     /*UIntType=>TinyIntType  */
+        ObNumberType,     /*UIntType=>SmallIntType  */
+        ObNumberType,     /*UIntType=>MediumIntType  */
+        ObNumberType,     /*UIntType=>Int32Type  */
         ObNumberType,     /*UIntType=>IntType  */
         ObUInt64Type,     /*UIntType=>UTinyIntType  */
         ObUInt64Type,     /*UIntType=>USmallIntType  */
-        ObUInt32Type,     /*UIntType=>UMediumIntType  */
+        ObUInt64Type,     /*UIntType=>UMediumIntType  */
         ObUInt64Type,     /*UIntType=>UInt32Type  */
         ObUInt64Type,     /*UIntType=>UIntType  */
         ObDoubleType,     /*UIntType=>FloatType  */