[td-225] add test cases.

src/client/src/tscSQLParser.c

@@ -7370,7 +7370,6 @@ static int32_t doValidateSubquery(SSqlNode* pSqlNode, int32_t index, SSqlObj* pS
   SSqlNode* p = taosArrayGetP(subInfo->pSubquery, 0);
 
   SQueryInfo* pSub = calloc(1, sizeof(SQueryInfo));
-  printf("-------------queryinfo:%p\n", pSub);
   tscInitQueryInfo(pSub);
 
   int32_t code = validateSqlNode(pSql, p, pSub);

src/client/src/tscServer.c

@@ -1614,6 +1614,7 @@ int tscProcessRetrieveLocalMergeRsp(SSqlObj *pSql) {
     taosArrayPush(group, &tableKeyInfo);
     taosArrayPush(tableGroupInfo.pGroupList, &group);
 
+    // todo remove it
     SExprInfo* list = calloc(tscNumOfExprs(pQueryInfo), sizeof(SExprInfo));
     for(int32_t i = 0; i < tscNumOfExprs(pQueryInfo); ++i) {
       SExprInfo* pExprInfo = tscExprGet(pQueryInfo, i);
@@ -1621,6 +1622,7 @@ int tscProcessRetrieveLocalMergeRsp(SSqlObj *pSql) {
     }
 
     pQueryInfo->pQInfo = createQInfoFromQueryNode(pQueryInfo, list, &tableGroupInfo, NULL, NULL, pRes->pLocalMerger, MERGE_STAGE);
+    tfree(list);
   }
 
   uint64_t localQueryId = 0;

src/client/src/tscUtil.c

@@ -1010,6 +1010,11 @@ void handleDownstreamOperator(SSqlObj** pSqlObjList, int32_t numOfUpstream, SQue
 
       pSourceOperator = createJoinOperator(p, px->numOfTables, schema, num);
       tfree(p);
+    } else {
+      int32_t num = taosArrayGetSize(px->colList);
+
+      schema = calloc(num, sizeof(SSchema));
+      memcpy(schema, pSchema, numOfCol1*sizeof(SSchema));
     }
 
     SExprInfo* exprInfo = NULL;

tests/script/general/parser/nestquery.sim

@@ -61,6 +61,43 @@ sleep 100
 
 $i = 1
 $tb = $tbPrefix . $i
-sql select count(*) from (select
+
+print simple nest query test
+sql select count(*) from (select count(*) from nest_mt0))
+if $rows != 1 then
+ return -1
+endi
+
+if $data00 != 1 then
+  return -1
+endi
+
+sql select count(*) from (select count(*) from nest_mt0 group by tbname)
+if $rows != 1 then
+  return -1
+endi
+
+if $data00 != 10 then
+  return -1
+endi
+
+sql select count(*) from (select count(*) from nest_mt0 interval(10h) group by tbname)
+if $rows != 1 then
+  return -1
+endi
+
+if $data00 != 10 then
+  return -1
+endi
+
+print =================> alias name test
+sql select count(a) from (select count(*) a from nest_tb0 interval(1h))
+if $rows != 1 then
+  return -1
+endi
+
+if $data00 != 1 then
+   return -1
+endi
 
 system sh/exec.sh -n dnode1 -s stop -x SIGINT