diff --git a/source/client/src/clientSml.c b/source/client/src/clientSml.c
index bcdba696925a0cef4838fa24a563852385044c22..b6db3b7081fb42e43c8b8a79bb121096daac9e4a 100644
--- a/source/client/src/clientSml.c
+++ b/source/client/src/clientSml.c
@@ -303,7 +303,7 @@ static int32_t smlApplySchemaAction(SSmlHandle* info, SSchemaAction* action) {
           uError("SML:0x%" PRIx64 " apply schema action. reset query cache. error: %s", info->id, taos_errstr(res2));
         }
         taos_free_result(res2);
-        taosMsleep(500);
+        taosMsleep(10);
       }
       break;
     }
@@ -327,7 +327,7 @@ static int32_t smlApplySchemaAction(SSmlHandle* info, SSchemaAction* action) {
           uError("SML:0x%" PRIx64 " apply schema action. reset query cache. error: %s", info->id, taos_errstr(res2));
         }
         taos_free_result(res2);
-        taosMsleep(500);
+        taosMsleep(10);
       }
       break;
     }
@@ -350,7 +350,7 @@ static int32_t smlApplySchemaAction(SSmlHandle* info, SSchemaAction* action) {
           uError("SML:0x%" PRIx64 " apply schema action. reset query cache. error: %s", info->id, taos_errstr(res2));
         }
         taos_free_result(res2);
-        taosMsleep(500);
+        taosMsleep(10);
       }
       break;
     }
@@ -373,7 +373,7 @@ static int32_t smlApplySchemaAction(SSmlHandle* info, SSchemaAction* action) {
           uError("SML:0x%" PRIx64 " apply schema action. reset query cache. error: %s", info->id, taos_errstr(res2));
         }
         taos_free_result(res2);
-        taosMsleep(500);
+        taosMsleep(10);
       }
       break;
     }
@@ -424,7 +424,7 @@ static int32_t smlApplySchemaAction(SSmlHandle* info, SSchemaAction* action) {
           uError("SML:0x%" PRIx64 " apply schema action. reset query cache. error: %s", info->id, taos_errstr(res2));
         }
         taos_free_result(res2);
-        taosMsleep(500);
+        taosMsleep(10);
       }
       break;
     }
@@ -461,18 +461,18 @@ static int32_t smlProcessSchemaAction(SSmlHandle* info, SSchema* schemaField, SH
 
 static int32_t smlModifyDBSchemas(SSmlHandle* info) {
   int32_t code = 0;
+  SEpSet ep = getEpSet_s(&info->taos->pAppInfo->mgmtEp);
+  SName pName = {TSDB_TABLE_NAME_T, info->taos->acctId, {0}, {0}};
+  strcpy(pName.dbname, info->pRequest->pDb);
 
   SSmlSTableMeta** tableMetaSml = (SSmlSTableMeta**)taosHashIterate(info->superTables, NULL);
   while (tableMetaSml) {
     SSmlSTableMeta* sTableData = *tableMetaSml;
-
     STableMeta *pTableMeta = NULL;
-    SEpSet ep = getEpSet_s(&info->taos->pAppInfo->mgmtEp);
 
     size_t superTableLen = 0;
     void *superTable = taosHashGetKey(tableMetaSml, &superTableLen);
-    SName pName = {TSDB_TABLE_NAME_T, info->taos->acctId, {0}, {0}};
-    strcpy(pName.dbname, info->pRequest->pDb);
+    memset(pName.tname, 0, TSDB_TABLE_NAME_LEN);
     memcpy(pName.tname, superTable, superTableLen);
 
     code = catalogGetSTableMeta(info->pCatalog, info->taos->pAppInfo->pTransporter, &ep, &pName, &pTableMeta);
@@ -487,7 +487,7 @@ static int32_t smlModifyDBSchemas(SSmlHandle* info) {
       code = smlApplySchemaAction(info, &schemaAction);
       if (code != TSDB_CODE_SUCCESS) {
         uError("SML:0x%"PRIx64" smlApplySchemaAction failed. can not create %s", info->id, schemaAction.createSTable.sTableName);
-        return code;
+        goto end;
       }
       info->cost.numOfCreateSTables++;
     }else if (code == TSDB_CODE_SUCCESS) {
@@ -502,7 +502,7 @@ static int32_t smlModifyDBSchemas(SSmlHandle* info) {
       code = smlProcessSchemaAction(info, pTableMeta->schema, hashTmp, sTableData->tags, &schemaAction, true);
       if (code != TSDB_CODE_SUCCESS) {
         taosHashCleanup(hashTmp);
-        return code;
+        goto end;
       }
 
       taosHashClear(hashTmp);
@@ -512,29 +512,33 @@ static int32_t smlModifyDBSchemas(SSmlHandle* info) {
       code = smlProcessSchemaAction(info, pTableMeta->schema, hashTmp, sTableData->cols, &schemaAction, false);
       taosHashCleanup(hashTmp);
       if (code != TSDB_CODE_SUCCESS) {
-        return code;
+        goto end;
       }
 
-      code = catalogRefreshTableMeta(info->pCatalog, info->taos->pAppInfo->pTransporter, &ep, &pName, -1);
+      code = catalogRefreshTableMeta(info->pCatalog, info->taos->pAppInfo->pTransporter, &ep, &pName, 1);
       if (code != TSDB_CODE_SUCCESS) {
-        return code;
+        goto end;
       }
     } else {
       uError("SML:0x%"PRIx64" load table meta error: %s", info->id, tstrerror(code));
-      return code;
+      goto end;
     }
     if(pTableMeta) taosMemoryFree(pTableMeta);
 
     code = catalogGetSTableMeta(info->pCatalog, info->taos->pAppInfo->pTransporter, &ep, &pName, &pTableMeta);
     if (code != TSDB_CODE_SUCCESS) {
       uError("SML:0x%"PRIx64" catalogGetSTableMeta failed. super table name %s", info->id, (char*)superTable);
-      return code;
+      goto end;
     }
     sTableData->tableMeta = pTableMeta;
 
     tableMetaSml = (SSmlSTableMeta**)taosHashIterate(info->superTables, tableMetaSml);
   }
   return 0;
+
+end:
+  catalogRefreshTableMeta(info->pCatalog, info->taos->pAppInfo->pTransporter, &ep, &pName, 1);
+  return code;
 }
 
 //=========================================================================
@@ -2298,7 +2302,13 @@ static int smlProcess(SSmlHandle *info, char* lines[], int numLines) {
   info->cost.numOfCTables = taosHashGetSize(info->childTables);
 
   info->cost.schemaTime = taosGetTimestampUs();
-  code = smlModifyDBSchemas(info);
+
+  int32_t retryNum = 0;
+  do{
+    code = smlModifyDBSchemas(info);
+    if (code == 0) break;
+  } while (retryNum++ < taosHashGetSize(info->superTables));
+
   if (code != 0) {
     uError("SML:0x%"PRIx64" smlModifyDBSchemas error : %s", info->id, tstrerror(code));
     goto cleanup;
@@ -2407,6 +2417,7 @@ TAOS_RES* taos_schemaless_insert(TAOS* taos, char* lines[], int numLines, int pr
   info->pRequest->code = smlProcess(info, lines, numLines);
 
 end:
+  info->taos->schemalessType = 0;
   uDebug("result:%s", info->msgBuf.buf);
   smlDestroyInfo(info);
   return (TAOS_RES*)request;