[td-11818] create streamscan operator when no tables created.

source/dnode/vnode/inc/vnode.h

@@ -215,13 +215,15 @@ static FORCE_INLINE void tqReadHandleSetColIdList(STqReadHandle *pReadHandle, SA
 static FORCE_INLINE int tqReadHandleSetTbUidList(STqReadHandle *pHandle, const SArray *tbUidList) {
   pHandle->tbIdHash = taosHashInit(64, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BIGINT), true, HASH_NO_LOCK);
   if (pHandle->tbIdHash == NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
     return -1;
   }
+
   for (int i = 0; i < taosArrayGetSize(tbUidList); i++) {
     int64_t *pKey = (int64_t *)taosArrayGet(tbUidList, i);
     taosHashPut(pHandle->tbIdHash, pKey, sizeof(int64_t), NULL, 0);
-    // pHandle->tbUid = tbUid;
   }
+
   return 0;
 }
 

source/libs/executor/src/executorimpl.c

@@ -5447,7 +5447,12 @@ SOperatorInfo* createStreamScanOperatorInfo(void *streamReadHandle, SArray* pExp
   
   // set the extract column id to streamHandle
   tqReadHandleSetColIdList((STqReadHandle* )streamReadHandle, pColList);
-  tqReadHandleSetTbUidList(streamReadHandle, pTableIdList);
+  int32_t code = tqReadHandleSetTbUidList(streamReadHandle, pTableIdList);
+  if (code != 0) {
+    tfree(pInfo);
+    tfree(pOperator);
+    return NULL;
+  }
 
   pInfo->readerHandle = streamReadHandle;
 
@@ -5462,7 +5467,6 @@ SOperatorInfo* createStreamScanOperatorInfo(void *streamReadHandle, SArray* pExp
   return pOperator;
 }
 
-
 void setTableScanFilterOperatorInfo(STableScanInfo* pTableScanInfo, SOperatorInfo* pDownstream) {
   assert(pTableScanInfo != NULL && pDownstream != NULL);
 
@@ -8186,16 +8190,22 @@ SOperatorInfo* doCreateOperatorTreeNode(SPhyNode* pPhyNode, SExecTaskInfo* pTask
       STableGroupInfo groupInfo = {0};
 
       int32_t code = doCreateTableGroup(pHandle->meta, pScanPhyNode->tableType, pScanPhyNode->uid, &groupInfo, queryId, taskId);
+      SArray* idList = NULL;
+
+      if (groupInfo.numOfTables > 0) {
+        SArray* pa = taosArrayGetP(groupInfo.pGroupList, 0);
+        ASSERT(taosArrayGetSize(groupInfo.pGroupList) == 1);
 
-      SArray* pa = taosArrayGetP(groupInfo.pGroupList, 0);
-      ASSERT(taosArrayGetSize(groupInfo.pGroupList) == 1);
+        // Transfer the Array of STableKeyInfo into uid list.
+        size_t  numOfTables = taosArrayGetSize(pa);
+        for (int32_t i = 0; i < numOfTables; ++i) {
+          STableKeyInfo* pkeyInfo = taosArrayGet(pa, i);
+          taosArrayPush(idList, &pkeyInfo->uid);
+        }
 
-      // Transfer the Array of STableKeyInfo into uid list.
-      size_t numOfTables = taosArrayGetSize(pa);
-      SArray* idList = taosArrayInit(numOfTables, sizeof(uint64_t));
-      for(int32_t i = 0; i < numOfTables; ++i) {
-        STableKeyInfo* pkeyInfo = taosArrayGet(pa, i);
-        taosArrayPush(idList, &pkeyInfo->uid);
+        idList = taosArrayInit(numOfTables, sizeof(uint64_t));
+      } else {
+        idList = taosArrayInit(4, sizeof(uint64_t));
       }
 
       SOperatorInfo* pOperator = createStreamScanOperatorInfo(pHandle->reader, pPhyNode->pTargets, idList, pTaskInfo);