[TD-4827]<fix>

src/client/src/tscSQLParser.c

@@ -8151,7 +8151,7 @@ int32_t exprTreeFromSqlExpr(SSqlCmd* pCmd, tExprNode **pExpr, const tSqlExpr* pS
       int32_t colType = -1;
       STableMeta* pTableMeta = tscGetMetaInfo(pQueryInfo, 0)->pTableMeta;
       if (pCols != NULL && taosArrayGetSize(pCols) > 0) {
-        SColIndex* idx = taosArrayGet(pCols, 0);
+        SColIndex* idx = taosArrayGet(pCols, taosArrayGetSize(pCols) - 1);
         SSchema* pSchema = tscGetTableColumnSchema(pTableMeta, idx->colIndex);
         if (pSchema != NULL) {
           colType = pSchema->type;

tests/script/general/parser/select_with_tags.sim

@@ -68,6 +68,27 @@ endw
 
 sleep 100
 
+
+#======================= only check first table tag, TD-4827
+sql select count(*) from $mt where t1 in (0)  
+if $rows != 1 then 
+  return -1
+endi
+if $data00 != $rowNum then  
+  return -1;
+endi
+
+$secTag = ' . abc  
+$secTag = $secTag . 0
+$secTag = $secTag . '
+sql select count(*) from $mt where t2 =$secTag  and t1 in (0)   
+if $rows != 1 then 
+  return -1
+endi
+if $data00 != $rowNum then  
+  return -1;
+endi
+
 #================================
 sql select ts from select_tags_mt0
 print $rows