Merge pull request #4061 from taosdata/feature/query

[TD-225] fix bugs

src/client/src/tscSubquery.c

@@ -1449,6 +1449,7 @@ void tscHandleMasterJoinQuery(SSqlObj* pSql) {
 
   tscDebug("%p start subquery, total:%d", pSql, pQueryInfo->numOfTables);
   for (int32_t i = 0; i < pQueryInfo->numOfTables; ++i) {
+
     SJoinSupporter *pSupporter = tscCreateJoinSupporter(pSql, i);
     
     if (pSupporter == NULL) {  // failed to create support struct, abort current query

src/client/src/tscUtil.c

@@ -2158,7 +2158,7 @@ int16_t tscGetJoinTagColIdByUid(STagCond* pTagCond, uint64_t uid) {
 }
 
 int16_t tscGetTagColIndexById(STableMeta* pTableMeta, int16_t colId) {
-  int32_t numOfTags = tscGetNumOfColumns(pTableMeta);
+  int32_t numOfTags = tscGetNumOfTags(pTableMeta);
 
   SSchema* pSchema = tscGetTableTagSchema(pTableMeta);
   for(int32_t i = 0; i < numOfTags; ++i) {
@@ -2167,7 +2167,9 @@ int16_t tscGetTagColIndexById(STableMeta* pTableMeta, int16_t colId) {
     }
   }
 
-  return -1;
+  // can not reach here
+  assert(0);
+  return INT16_MIN;
 }
 
 bool tscIsUpdateQuery(SSqlObj* pSql) {