diff --git a/source/client/test/clientTests.cpp b/source/client/test/clientTests.cpp
index 286cb99cb9..1a155beb90 100644
--- a/source/client/test/clientTests.cpp
+++ b/source/client/test/clientTests.cpp
@@ -53,7 +53,6 @@ TEST(testCase, driverInit_Test) {
 //  taos_init();
 }
 
-#if 0
 TEST(testCase, connect_Test) {
 //  taos_options(TSDB_OPTION_CONFIGDIR, "/home/ubuntu/first/cfg");
 
@@ -564,8 +563,6 @@ TEST(testCase, insert_test) {
   taos_free_result(pRes);
   taos_close(pConn);
 }
-#endif
-
 
 TEST(testCase, projection_query_tables) {
   TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
@@ -579,7 +576,7 @@ TEST(testCase, projection_query_tables) {
 
   TAOS_RES* pRes = taos_query(pConn, "use abc1");
   taos_free_result(pRes);
-#if 0
+
   pRes = taos_query(pConn, "create stable st1 (ts timestamp, k int) tags(a int)");
   if (taos_errno(pRes) != 0) {
     printf("failed to create table tu, reason:%s\n", taos_errstr(pRes));
@@ -602,9 +599,8 @@ TEST(testCase, projection_query_tables) {
 
     taos_free_result(p);
   }
-#endif
 
-  pRes = taos_query(pConn, "select count(ts) from tu");
+  pRes = taos_query(pConn, "select * from tu");
   if (taos_errno(pRes) != 0) {
     printf("failed to select from table, reason:%s\n", taos_errstr(pRes));
     taos_free_result(pRes);
@@ -625,7 +621,6 @@ TEST(testCase, projection_query_tables) {
   taos_close(pConn);
 }
 
-#if 0
 TEST(testCase, projection_query_stables) {
   TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
   ASSERT_NE(pConn, nullptr);
@@ -687,6 +682,5 @@ TEST(testCase, agg_query_tables) {
   taos_free_result(pRes);
   taos_close(pConn);
 }
-#endif
 
 #pragma GCC diagnostic pop
diff --git a/source/libs/executor/src/executorimpl.c b/source/libs/executor/src/executorimpl.c
index bc257f797a..7bf3371006 100644
--- a/source/libs/executor/src/executorimpl.c
+++ b/source/libs/executor/src/executorimpl.c
@@ -8140,11 +8140,9 @@ SOperatorInfo* doCreateOperatorTreeNode(SPhysiNode* pPhyNode, SExecTaskInfo* pTa
         idList = taosArrayInit(4, sizeof(uint64_t));
       }
 
-      // SOperatorInfo* pOperator = createStreamScanOperatorInfo(pHandle->reader, pScanPhyNode->pScanCols, idList, pTaskInfo);
-      // taosArrayDestroy(idList);
-
-      // //TODO destroy groupInfo
-      // return pOperator;
+//       SOperatorInfo* pOperator = createStreamScanOperatorInfo(pHandle->reader, pScanPhyNode->pScanCols, idList, pTaskInfo);
+       taosArrayDestroy(idList);
+//       return pOperator;
     }
   }
 
@@ -8175,9 +8173,9 @@ SOperatorInfo* doCreateOperatorTreeNode(SPhysiNode* pPhyNode, SExecTaskInfo* pTa
 static tsdbReaderT createDataReaderImpl(STableScanPhysiNode* pTableScanNode, STableGroupInfo* pGroupInfo, void* readHandle, uint64_t queryId, uint64_t taskId) {
   STsdbQueryCond cond = {.loadExternalRows = false};
 
-  cond.order = pTableScanNode->scan.order;
+  cond.order     = pTableScanNode->scan.order;
   cond.numOfCols = LIST_LENGTH(pTableScanNode->scan.pScanCols);
-  cond.colList = calloc(cond.numOfCols, sizeof(SColumnInfo));
+  cond.colList   = calloc(cond.numOfCols, sizeof(SColumnInfo));
   if (cond.colList == NULL) {
     terrno = TSDB_CODE_QRY_OUT_OF_MEMORY;
     return NULL;
@@ -8187,15 +8185,21 @@ static tsdbReaderT createDataReaderImpl(STableScanPhysiNode* pTableScanNode, STa
   cond.type = BLOCK_LOAD_OFFSET_SEQ_ORDER;
 //  cond.type = pTableScanNode->scanFlag;
 
+  int32_t j = 0;
   for (int32_t i = 0; i < cond.numOfCols; ++i) {
     STargetNode* pNode = (STargetNode*)nodesListGetNode(pTableScanNode->scan.pScanCols, i);
-
     SColumnNode* pColNode = (SColumnNode*)pNode->pExpr;
-    cond.colList[i].type  = pColNode->node.resType.type;
-    cond.colList[i].bytes = pColNode->node.resType.bytes;
-    cond.colList[i].colId = pColNode->colId;
+    if (pColNode->colType == COLUMN_TYPE_TAG) {
+      continue;
+    }
+
+    cond.colList[j].type  = pColNode->node.resType.type;
+    cond.colList[j].bytes = pColNode->node.resType.bytes;
+    cond.colList[j].colId = pColNode->colId;
+    j += 1;
   }
 
+  cond.numOfCols = j;
   return tsdbQueryTables(readHandle, &cond, pGroupInfo, queryId, taskId);
 }
 
diff --git a/source/libs/parser/src/parTranslater.c b/source/libs/parser/src/parTranslater.c
index 0ed73ea1f6..e97ff91c16 100644
--- a/source/libs/parser/src/parTranslater.c
+++ b/source/libs/parser/src/parTranslater.c
@@ -131,7 +131,7 @@ static int32_t createColumnNodeByTable(STranslateContext* pCxt, const STableNode
       if (NULL == pCol) {
         return generateSyntaxErrMsg(&pCxt->msgBuf, TSDB_CODE_OUT_OF_MEMORY);
       }
-      setColumnInfoBySchema((SRealTableNode*)pTable, pMeta->schema + i, (i < pMeta->tableInfo.numOfTags), pCol);
+      setColumnInfoBySchema((SRealTableNode*)pTable, pMeta->schema + i, (i >= pMeta->tableInfo.numOfColumns), pCol);
       nodesListAppend(pList, (SNode*)pCol);
     }
   } else {
@@ -156,7 +156,7 @@ static bool findAndSetColumn(SColumnNode* pCol, const STableNode* pTable) {
     int32_t nums = pMeta->tableInfo.numOfTags + pMeta->tableInfo.numOfColumns;
     for (int32_t i = 0; i < nums; ++i) {
       if (0 == strcmp(pCol->colName, pMeta->schema[i].name)) {
-        setColumnInfoBySchema((SRealTableNode*)pTable, pMeta->schema + i, (i < pMeta->tableInfo.numOfTags), pCol);
+        setColumnInfoBySchema((SRealTableNode*)pTable, pMeta->schema + i, (i >= pMeta->tableInfo.numOfColumns), pCol);
         found = true;
         break;
       }
@@ -1090,6 +1090,10 @@ static int32_t translateShow(STranslateContext* pCxt, SShowStmt* pStmt) {
 static int32_t translateShowTables(STranslateContext* pCxt) {
   SName name = {0};
   SVShowTablesReq* pShowReq = calloc(1, sizeof(SVShowTablesReq));
+  if (pCxt->pParseCxt->db == NULL || strlen(pCxt->pParseCxt->db) == 0) {
+    return generateSyntaxErrMsg(&pCxt->msgBuf, TSDB_CODE_TSC_INVALID_OPERATION, "db not specified");
+  }
+
   tNameSetDbName(&name, pCxt->pParseCxt->acctId, pCxt->pParseCxt->db, strlen(pCxt->pParseCxt->db));
   char dbFname[TSDB_DB_FNAME_LEN] = {0};
   tNameGetFullDbName(&name, dbFname);