diff --git a/include/util/tdef.h b/include/util/tdef.h
index 0a0fe22449..a2b014cc7e 100644
--- a/include/util/tdef.h
+++ b/include/util/tdef.h
@@ -184,6 +184,7 @@ typedef enum ELogicConditionType {
 #define TSDB_UNI_LEN  24
 #define TSDB_USER_LEN TSDB_UNI_LEN
 
+#define TSDB_POINTER_PRINT_BYTES 18 // 0x1122334455667788
 // ACCOUNT is a 32 bit positive integer
 // this is the length of its string representation, including the terminator zero
 #define TSDB_ACCT_ID_LEN 11
diff --git a/source/libs/function/src/functionMgt.c b/source/libs/function/src/functionMgt.c
index e75189e54a..5caeb2b43c 100644
--- a/source/libs/function/src/functionMgt.c
+++ b/source/libs/function/src/functionMgt.c
@@ -391,7 +391,7 @@ static int32_t createPartialFunction(const SFunctionNode* pSrcFunc, SFunctionNod
     nodesDestroyList(pParameterList);
     return TSDB_CODE_OUT_OF_MEMORY;
   }
-  char name[TSDB_FUNC_NAME_LEN + TSDB_NAME_DELIMITER_LEN + sizeof(pSrcFunc) + 1] = {0};
+  char name[TSDB_FUNC_NAME_LEN + TSDB_NAME_DELIMITER_LEN + TSDB_POINTER_PRINT_BYTES + 1] = {0};
   int32_t len = snprintf(name, sizeof(name) - 1, "%s.%p", (*pPartialFunc)->functionName, pSrcFunc);
   taosCreateMD5Hash(name, len);
   strncpy((*pPartialFunc)->node.aliasName, name, TSDB_COL_NAME_LEN - 1);
diff --git a/source/libs/planner/src/planOptimizer.c b/source/libs/planner/src/planOptimizer.c
index 010bbe6477..32d883d4ea 100644
--- a/source/libs/planner/src/planOptimizer.c
+++ b/source/libs/planner/src/planOptimizer.c
@@ -1615,7 +1615,7 @@ static void partTagsSetAlias(char* pAlias, const char* pTableAlias, const char*
   int32_t len = snprintf(name, TSDB_COL_FNAME_LEN, "%s.%s", pTableAlias, pColName);
 
   taosCreateMD5Hash(name, len);
-  strcpy(pAlias, name);
+  strncpy(pAlias, name, TSDB_COL_NAME_LEN - 1);
 }
 
 static SNode* partTagsCreateWrapperFunc(const char* pFuncName, SNode* pNode) {
@@ -2136,7 +2136,7 @@ static SNode* rewriteUniqueOptCreateFirstFunc(SFunctionNode* pSelectValue, SNode
     strcpy(pFunc->node.aliasName, pSelectValue->node.aliasName);
   } else {
     int64_t pointer = (int64_t)pFunc;
-    char name[TSDB_FUNC_NAME_LEN + sizeof(pointer) + TSDB_NAME_DELIMITER_LEN + 1] = {0};
+    char name[TSDB_FUNC_NAME_LEN + TSDB_POINTER_PRINT_BYTES + TSDB_NAME_DELIMITER_LEN + 1] = {0};
     int32_t len = snprintf(name, sizeof(name) - 1, "%s.%" PRId64 "", pFunc->functionName, pointer);
     taosCreateMD5Hash(name, len);
     strncpy(pFunc->node.aliasName, name, TSDB_COL_NAME_LEN - 1);
diff --git a/source/libs/planner/src/planSpliter.c b/source/libs/planner/src/planSpliter.c
index 674ec7ca70..7f27a0539d 100644
--- a/source/libs/planner/src/planSpliter.c
+++ b/source/libs/planner/src/planSpliter.c
@@ -388,7 +388,7 @@ static int32_t stbSplAppendWStart(SNodeList* pFuncs, int32_t* pIndex) {
   }
   strcpy(pWStart->functionName, "_wstart");
   int64_t pointer = (int64_t)pWStart;
-  char name[TSDB_COL_NAME_LEN + sizeof(pointer) + TSDB_NAME_DELIMITER_LEN + 1] = {0};
+  char name[TSDB_COL_NAME_LEN + TSDB_POINTER_PRINT_BYTES + TSDB_NAME_DELIMITER_LEN + 1] = {0};
   int32_t len = snprintf(name, sizeof(name) - 1, "%s.%" PRId64 "", pWStart->functionName, pointer);
   taosCreateMD5Hash(name, len);
   strncpy(pWStart->node.aliasName, name, TSDB_COL_NAME_LEN - 1);
@@ -418,7 +418,7 @@ static int32_t stbSplAppendWEnd(SWindowLogicNode* pWin, int32_t* pIndex) {
   }
   strcpy(pWEnd->functionName, "_wend");
   int64_t pointer = (int64_t)pWEnd;
-  char name[TSDB_COL_NAME_LEN + sizeof(pointer) + TSDB_NAME_DELIMITER_LEN + 1] = {0};
+  char name[TSDB_COL_NAME_LEN + TSDB_POINTER_PRINT_BYTES + TSDB_NAME_DELIMITER_LEN + 1] = {0};
   int32_t len = snprintf(name, sizeof(name) - 1, "%s.%" PRId64 "", pWEnd->functionName, pointer);
   taosCreateMD5Hash(name, len);
   strncpy(pWEnd->node.aliasName, name, TSDB_COL_NAME_LEN - 1);