diff --git a/src/client/src/tscParseLineProtocol.c b/src/client/src/tscParseLineProtocol.c
index 03e361c950..575cd80db6 100644
--- a/src/client/src/tscParseLineProtocol.c
+++ b/src/client/src/tscParseLineProtocol.c
@@ -418,7 +418,7 @@ static int32_t applySchemaAction(TAOS* taos, SSchemaAction* action, SSmlLinesInf
       }
       taos_free_result(res);
 
-      if (code == TSDB_CODE_MND_INVALID_COLUMN_LENGTH) {
+      if (code == TSDB_CODE_MND_INVALID_COLUMN_LENGTH || code == TSDB_CODE_TSC_INVALID_COLUMN_LENGTH) {
         TAOS_RES* res2 = taos_query(taos, "RESET QUERY CACHE");
         code = taos_errno(res2);
         if (code != TSDB_CODE_SUCCESS) {
@@ -439,7 +439,7 @@ static int32_t applySchemaAction(TAOS* taos, SSchemaAction* action, SSmlLinesInf
       }
       taos_free_result(res);
 
-      if (code == TSDB_CODE_MND_INVALID_TAG_LENGTH) {
+      if (code == TSDB_CODE_MND_INVALID_TAG_LENGTH || code == TSDB_CODE_TSC_INVALID_TAG_LENGTH) {
         TAOS_RES* res2 = taos_query(taos, "RESET QUERY CACHE");
         code = taos_errno(res2);
         if (code != TSDB_CODE_SUCCESS) {
diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 64f88b373d..bb79b93613 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -6021,7 +6021,6 @@ int32_t setAlterTableInfo(SSqlObj* pSql, struct SSqlInfo* pInfo) {
   const char* msg19 = "invalid new tag name";
   const char* msg20 = "table is not super table";
   const char* msg21 = "only binary/nchar column length could be modified";
-  const char* msg22 = "new column length should be bigger than old one";
   const char* msg23 = "only column length coulbe be modified";
   const char* msg24 = "invalid binary/nchar column length";
 
@@ -6317,7 +6316,7 @@ int32_t setAlterTableInfo(SSqlObj* pSql, struct SSqlInfo* pInfo) {
     }
 
     if (pItem->bytes <= pColSchema->bytes) {
-      return invalidOperationMsg(pMsg, msg22);
+      return tscErrorMsgWithCode(TSDB_CODE_TSC_INVALID_COLUMN_LENGTH, tscGetErrorMsgPayload(pCmd), pItem->name, NULL);
     }
 
     SSchema* pSchema = (SSchema*) pTableMetaInfo->pTableMeta->schema;
@@ -6368,7 +6367,7 @@ int32_t setAlterTableInfo(SSqlObj* pSql, struct SSqlInfo* pInfo) {
     }
 
     if (pItem->bytes <= pColSchema->bytes) {
-      return invalidOperationMsg(pMsg, msg22);
+      return tscErrorMsgWithCode(TSDB_CODE_TSC_INVALID_TAG_LENGTH, tscGetErrorMsgPayload(pCmd), pItem->name, NULL);
     }
 
     SSchema* pSchema = tscGetTableTagSchema(pTableMetaInfo->pTableMeta);
diff --git a/src/inc/taoserror.h b/src/inc/taoserror.h
index f54150d76b..08f6d0bf4d 100644
--- a/src/inc/taoserror.h
+++ b/src/inc/taoserror.h
@@ -104,6 +104,8 @@ int32_t* taosGetErrno();
 #define TSDB_CODE_TSC_LINE_SYNTAX_ERROR         TAOS_DEF_ERROR_CODE(0, 0x021B)  //"Syntax error in Line")
 #define TSDB_CODE_TSC_NO_META_CACHED            TAOS_DEF_ERROR_CODE(0, 0x021C)  //"No table meta cached")
 #define TSDB_CODE_TSC_DUP_COL_NAMES             TAOS_DEF_ERROR_CODE(0, 0x021D)  //"duplicated column names")
+#define TSDB_CODE_TSC_INVALID_TAG_LENGTH        TAOS_DEF_ERROR_CODE(0, 0x021E)  //"Invalid tag length")
+#define TSDB_CODE_TSC_INVALID_COLUMN_LENGTH        TAOS_DEF_ERROR_CODE(0, 0x021F)  //"Invalid tag length")
 
 // mnode
 #define TSDB_CODE_MND_MSG_NOT_PROCESSED         TAOS_DEF_ERROR_CODE(0, 0x0300)  //"Message not processed")