diff --git a/source/client/src/clientImpl.c b/source/client/src/clientImpl.c
index a32d4110d9c09e688be2b3e635358c51a41c9680..905472dc712aa3064e4dadd85746f3c294f1c535 100644
--- a/source/client/src/clientImpl.c
+++ b/source/client/src/clientImpl.c
@@ -299,6 +299,8 @@ int32_t scheduleQuery(SRequestObj* pRequest, SQueryPlan* pDag, SArray* pNodeList
       schedulerFreeJob(pRequest->body.queryJob);
     }
 
+    *pRes = res.res;
+
     pRequest->code = code;
     terrno = code;
     return pRequest->code;
diff --git a/source/libs/catalog/src/catalog.c b/source/libs/catalog/src/catalog.c
index 23957d1a6bfdc0cd87dd6f94727d0e1dc76adb57..d5301e3624fd632d31e48e6eae0944d5ceebd8be 100644
--- a/source/libs/catalog/src/catalog.c
+++ b/source/libs/catalog/src/catalog.c
@@ -2885,7 +2885,7 @@ _return:
 
 
 
-int32_t ctgGetTbSverFromCache(SCatalog* pCtg, const SName* pTableName, int32_t* sver) {
+int32_t ctgGetTbSverFromCache(SCatalog* pCtg, const SName* pTableName, int32_t* sver, int32_t *tbType, uint64_t *suid, char* stbName) {
   *sver = -1;
   
   if (NULL == pCtg->dbCache) {
@@ -2903,14 +2903,12 @@ int32_t ctgGetTbSverFromCache(SCatalog* pCtg, const SName* pTableName, int32_t*
     return TSDB_CODE_SUCCESS;
   }
   
-  int32_t tbType = 0;
-  uint64_t suid = 0;
   CTG_LOCK(CTG_READ, &dbCache->tbCache.metaLock);
   STableMeta* tbMeta = taosHashGet(dbCache->tbCache.metaCache, pTableName->tname, strlen(pTableName->tname));
   if (tbMeta) {
-    tbType = tbMeta->tableType;
-    suid = tbMeta->suid;
-    if (tbType != TSDB_CHILD_TABLE) {
+    *tbType = tbMeta->tableType;
+    *suid = tbMeta->suid;
+    if (*tbType != TSDB_CHILD_TABLE) {
       *sver = tbMeta->sversion;
     }
   }
@@ -2921,44 +2919,49 @@ int32_t ctgGetTbSverFromCache(SCatalog* pCtg, const SName* pTableName, int32_t*
     return TSDB_CODE_SUCCESS;
   }
 
-  if (tbType != TSDB_CHILD_TABLE) {
+  if (*tbType != TSDB_CHILD_TABLE) {
     ctgReleaseDBCache(pCtg, dbCache);
-    ctgDebug("Got sver %d from cache, type:%d, dbFName:%s, tbName:%s", *sver, tbType, dbFName, pTableName->tname);
+    ctgDebug("Got sver %d from cache, type:%d, dbFName:%s, tbName:%s", *sver, *tbType, dbFName, pTableName->tname);
     
     return TSDB_CODE_SUCCESS;
   }
 
-  ctgDebug("Got subtable meta from cache, dbFName:%s, tbName:%s, suid:%" PRIx64, dbFName, pTableName->tname, suid);
+  ctgDebug("Got subtable meta from cache, dbFName:%s, tbName:%s, suid:%" PRIx64, dbFName, pTableName->tname, *suid);
   
   CTG_LOCK(CTG_READ, &dbCache->tbCache.stbLock);
   
-  STableMeta **stbMeta = taosHashGet(dbCache->tbCache.stbCache, &suid, sizeof(suid));
+  STableMeta **stbMeta = taosHashGet(dbCache->tbCache.stbCache, suid, sizeof(*suid));
   if (NULL == stbMeta || NULL == *stbMeta) {
     CTG_UNLOCK(CTG_READ, &dbCache->tbCache.stbLock);
     ctgReleaseDBCache(pCtg, dbCache);
-    ctgDebug("stb not in stbCache, suid:%"PRIx64, suid);
+    ctgDebug("stb not in stbCache, suid:%"PRIx64, *suid);
     return TSDB_CODE_SUCCESS;
   }
 
-  if ((*stbMeta)->suid != suid) {    
+  if ((*stbMeta)->suid != *suid) {
     CTG_UNLOCK(CTG_READ, &dbCache->tbCache.stbLock);
     ctgReleaseDBCache(pCtg, dbCache);
-    ctgError("stable suid in stbCache mis-match, expected suid:%"PRIx64 ",actual suid:%"PRIx64, suid, (*stbMeta)->suid);
+    ctgError("stable suid in stbCache mis-match, expected suid:%"PRIx64 ",actual suid:%"PRIx64, *suid, (*stbMeta)->suid);
     CTG_ERR_RET(TSDB_CODE_CTG_INTERNAL_ERROR);
   }
 
+  size_t nameLen = 0;
+  char* name = taosHashGetKey(*stbMeta, &nameLen);
+  
+  strncpy(stbName, name, nameLen);
+  stbName[nameLen] = 0;
+
   *sver = (*stbMeta)->sversion;
 
   CTG_UNLOCK(CTG_READ, &dbCache->tbCache.stbLock);
 
   ctgReleaseDBCache(pCtg, dbCache);
 
-  ctgDebug("Got sver %d from cache, type:%d, dbFName:%s, tbName:%s", *sver, tbType, dbFName, pTableName->tname);
+  ctgDebug("Got sver %d from cache, type:%d, dbFName:%s, tbName:%s", *sver, *tbType, dbFName, pTableName->tname);
   
   return TSDB_CODE_SUCCESS;
 }
 
-
 int32_t catalogChkTbMetaVersion(SCatalog* pCtg, void *pTrans, const SEpSet* pMgmtEps, SArray* pTables) {
   CTG_API_ENTER();
 
@@ -2977,9 +2980,26 @@ int32_t catalogChkTbMetaVersion(SCatalog* pCtg, void *pTrans, const SEpSet* pMgm
       continue;
     }
 
-    ctgGetTbSverFromCache(pCtg, &name, &sver);
+    int32_t tbType = 0;
+    uint64_t suid = 0;
+    char stbName[TSDB_TABLE_FNAME_LEN];
+    ctgGetTbSverFromCache(pCtg, &name, &sver, &tbType, &suid, stbName);
     if (sver >= 0 && sver < pTb->sver) {
-      catalogRemoveTableMeta(pCtg, &name); //TODO REMOVE STB FROM CACHE
+      switch (tbType) {
+        case TSDB_CHILD_TABLE: {
+          SName stb = name;
+          strcpy(stb.tname, stbName);
+          catalogRemoveTableMeta(pCtg, &stb);        
+          break;
+        }
+        case TSDB_SUPER_TABLE:
+        case TSDB_NORMAL_TABLE:
+          catalogRemoveTableMeta(pCtg, &name);
+          break;
+        default:
+          ctgError("ignore table type %d", tbType);
+          break;
+      }
     }
   }
 
diff --git a/source/libs/executor/src/executorimpl.c b/source/libs/executor/src/executorimpl.c
index 37aeb367f521d389b53a52b2e45c0dda6bcbbb13..7c9ea1a5c5a4caed817df5199e5c60e006237588 100644
--- a/source/libs/executor/src/executorimpl.c
+++ b/source/libs/executor/src/executorimpl.c
@@ -4576,10 +4576,11 @@ SExprInfo* createExprInfo(SNodeList* pNodeList, SNodeList* pGroupKeys, int32_t*
   return pExprs;
 }
 
-static SExecTaskInfo* createExecTaskInfo(uint64_t queryId, uint64_t taskId, EOPTR_EXEC_MODEL model) {
+static SExecTaskInfo* createExecTaskInfo(uint64_t queryId, uint64_t taskId, EOPTR_EXEC_MODEL model, char* dbFName) {
   SExecTaskInfo* pTaskInfo = taosMemoryCalloc(1, sizeof(SExecTaskInfo));
   setTaskStatus(pTaskInfo, TASK_NOT_COMPLETED);
 
+  pTaskInfo->schemaVer.dbname = strdup(dbFName);
   pTaskInfo->cost.created = taosGetTimestampMs();
   pTaskInfo->id.queryId = queryId;
   pTaskInfo->execModel = model;
@@ -4994,16 +4995,10 @@ SArray* extractColMatchInfo(SNodeList* pNodeList, SDataBlockDescNode* pOutputNod
     return NULL;
   }
 
-  const char* tname = pTaskInfo->schemaVer.tablename;
   for (int32_t i = 0; i < numOfCols; ++i) {
     STargetNode* pNode = (STargetNode*)nodesListGetNode(pNodeList, i);
     SColumnNode* pColNode = (SColumnNode*)pNode->pExpr;
 
-    if (tname != NULL && (pTaskInfo->schemaVer.dbname == NULL) &&
-        strncmp(pColNode->tableName, tname, tListLen(pColNode->tableName)) == 0) {
-      pTaskInfo->schemaVer.dbname = strdup(pColNode->dbName);
-    }
-
     SColMatchInfo c = {0};
     c.output = true;
     c.colId = pColNode->colId;
@@ -5099,7 +5094,7 @@ int32_t createExecTaskInfoImpl(SSubplan* pPlan, SExecTaskInfo** pTaskInfo, SRead
   uint64_t queryId = pPlan->id.queryId;
 
   int32_t code = TSDB_CODE_SUCCESS;
-  *pTaskInfo = createExecTaskInfo(queryId, taskId, model);
+  *pTaskInfo = createExecTaskInfo(queryId, taskId, model, pPlan->dbFName);
   if (*pTaskInfo == NULL) {
     code = TSDB_CODE_QRY_OUT_OF_MEMORY;
     goto _complete;
diff --git a/source/libs/qcom/src/queryUtil.c b/source/libs/qcom/src/queryUtil.c
index 58886d706af0e1091ddb9ac805deb50510d85a37..f4ba2fca8146b37a3e25bc7173488dd85c8e48d0 100644
--- a/source/libs/qcom/src/queryUtil.c
+++ b/source/libs/qcom/src/queryUtil.c
@@ -58,7 +58,7 @@ static bool doValidateSchema(SSchema* pSchema, int32_t numOfCols, int32_t maxLen
 
     // 3. valid column names
     for (int32_t j = i + 1; j < numOfCols; ++j) {
-      if (strncasecmp(pSchema[i].name, pSchema[j].name, sizeof(pSchema[i].name) - 1) == 0) {
+      if (strncmp(pSchema[i].name, pSchema[j].name, sizeof(pSchema[i].name) - 1) == 0) {
         return false;
       }
     }
diff --git a/source/libs/qworker/src/qworker.c b/source/libs/qworker/src/qworker.c
index 102cf9aa0a8f1c2efe18a0df206f642b4666f4be..cb7ff08fa3b8c869a101ad202c274490a49091bd 100644
--- a/source/libs/qworker/src/qworker.c
+++ b/source/libs/qworker/src/qworker.c
@@ -1161,8 +1161,7 @@ int32_t qwProcessFetch(QW_FPARAMS_DEF, SQWMsg *qwMsg) {
   QW_ERR_JRET(qwGetResFromSink(QW_FPARAMS(), ctx, &dataLen, &rsp, &sOutput));
 
   if (NULL == rsp) {
-    atomic_store_ptr(&ctx->dataConnInfo.handle, qwMsg->connInfo.handle);
-    atomic_store_ptr(&ctx->dataConnInfo.ahandle, qwMsg->connInfo.ahandle);
+    ctx->dataConnInfo = qwMsg->connInfo;
 
     QW_SET_EVENT_RECEIVED(ctx, QW_EVENT_FETCH);
   } else {
diff --git a/source/libs/scheduler/src/scheduler.c b/source/libs/scheduler/src/scheduler.c
index 7f79122e0ec132284ecd63551c25d47a6b8761af..899748ec45d8c800ef184bc714f1946435db34ce 100644
--- a/source/libs/scheduler/src/scheduler.c
+++ b/source/libs/scheduler/src/scheduler.c
@@ -2565,24 +2565,32 @@ int32_t schedulerExecJob(void *transport, SArray *nodeList, SQueryPlan *pDag, in
     SCH_ERR_RET(TSDB_CODE_QRY_INVALID_INPUT);
   }
 
+  int32_t code = 0;
+  
+  *pJob = 0;
+  
   if (EXPLAIN_MODE_STATIC == pDag->explainInfo.mode) {
     SCH_ERR_RET(schExecStaticExplain(transport, nodeList, pDag, pJob, sql, true));
   } else {
-    SCH_ERR_RET(schExecJobImpl(transport, nodeList, pDag, pJob, sql, startTs, true));
+    SCH_ERR_JRET(schExecJobImpl(transport, nodeList, pDag, pJob, sql, startTs, true));
   }
 
-  SSchJob *job = schAcquireJob(*pJob);
+_return:
 
-  pRes->code = atomic_load_32(&job->errCode);
-  pRes->numOfRows = job->resNumOfRows;
-  if (SCH_RES_TYPE_QUERY == job->resType) {
-    pRes->res = job->resData;
-    job->resData = NULL;
-  }
+  if (*pJob) {
+    SSchJob *job = schAcquireJob(*pJob);
 
-  schReleaseJob(*pJob);
+    pRes->code = atomic_load_32(&job->errCode);
+    pRes->numOfRows = job->resNumOfRows;
+    if (SCH_RES_TYPE_QUERY == job->resType) {
+      pRes->res = job->resData;
+      job->resData = NULL;
+    }
 
-  return TSDB_CODE_SUCCESS;
+    schReleaseJob(*pJob);
+  }
+
+  return code;
 }
 
 int32_t schedulerAsyncExecJob(void *transport, SArray *pNodeList, SQueryPlan *pDag, const char *sql, int64_t *pJob) {