[td-4231]<enhance>: report error if only tags of the table are retrieved in...

[td-4231]<enhance>: report error if only tags of the table are retrieved in the select clause when the filter condition only includes normal columns.

src/client/src/tscSQLParser.c

@@ -7119,6 +7119,7 @@ int32_t doValidateSqlNode(SSqlObj* pSql, SQuerySqlNode* pQuerySqlNode, int32_t i
   const char* msg6 = "too many tables in from clause";
   const char* msg7 = "invalid table alias name";
   const char* msg8 = "alias name too long";
+  const char* msg9 = "only tag query not compatible with normal column filter";
 
   int32_t code = TSDB_CODE_SUCCESS;
 
@@ -7288,6 +7289,16 @@ int32_t doValidateSqlNode(SSqlObj* pSql, SQuerySqlNode* pQuerySqlNode, int32_t i
     if (hasUnsupportFunctionsForSTableQuery(pCmd, pQueryInfo)) {
       return TSDB_CODE_TSC_INVALID_SQL;
     }
+
+    if(tscQueryTags(pQueryInfo)) {
+      int32_t numOfCols = taosArrayGetSize(pQueryInfo->colList);
+      for(int32_t i = 0; i < numOfCols; ++i) {
+        SColumn* pCols = taosArrayGetP(pQueryInfo->colList, i);
+        if (pCols->numOfFilters > 0) {
+          return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg9);
+        }
+      }
+    }
   }
 
   if (parseSessionClause(pCmd, pQueryInfo, pQuerySqlNode) != TSDB_CODE_SUCCESS) {

tests/script/general/parser/select_with_tags.sim

@@ -847,10 +847,16 @@ sql_error select tbname, t1 from select_tags_mt0 interval(1y);
 #valid sql: select first(c1), last(c2), count(*) from select_tags_mt0 group by tbname, t1;
 #valid sql: select first(c1), tbname, t1 from select_tags_mt0 group by t2;
 
+print ==================================>TD-4231
+sql_error select t1,tbname from select_tags_mt0 where c1<0
+sql_error select t1,tbname from select_tags_mt0 where c1<0 and tbname in ('select_tags_tb12')
+
+sql select tbname from select_tags_mt0 where tbname in ('select_tags_tb12');
+
 sql_error select first(c1), last(c2), t1 from select_tags_mt0 group by tbname;
 sql_error select first(c1), last(c2), tbname, t2 from select_tags_mt0 group by tbname;
 sql_error select first(c1), count(*), t2, t1, tbname from select_tags_mt0 group by tbname;
-# this sql is valid: select first(c1), t2 from select_tags_mt0 group by tbname;
+#valid sql: select first(c1), t2 from select_tags_mt0 group by tbname;
 
 #sql select first(ts), tbname from select_tags_mt0 group by tbname;
 #sql select count(c1) from select_tags_mt0 where c1=99 group by tbname;