fix coredump when max and projection appears at the outer query

src/client/src/tscSQLParser.c

@@ -2490,6 +2490,7 @@ int32_t addProjectionExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, t
         /*SExprInfo* pExpr = */ tscAddFuncInSelectClause(pQueryInfo, startPos, TSDB_FUNC_TAGPRJ, &index, &colSchema,
                                                          TSDB_COL_TAG, getNewResColId(pCmd));
       }
+      pQueryInfo->type |= TSDB_QUERY_TYPE_PROJECTION_QUERY;
     } else {
       STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, index.tableIndex);
       STableMeta*     pTableMeta = pTableMetaInfo->pTableMeta;

tests/script/general/parser/nestquery.sim

@@ -941,4 +941,14 @@ if $data02 != 0 then
   return -1
 endi
 
+print ==============> TD-11969
+sql create database test11969;
+sql use test11969;
+sql create stable st (ts timestamp , id int ) tags (ind int );
+sql insert into sub1 using st tags(1) values(now ,1);
+sql insert into sub1 using st tags(1) values(now ,2);
+sql insert into sub2 using st tags(2) values(now ,3);
+sql insert into sub2 using st tags(2) values(now ,4);
+sql_error select max(ts_inter) ,tbname from (select elapsed(ts) ts_inter ,tbname from st interval (1s) group by tbname) order by ts
+sql drop database test11969
 system sh/exec.sh -n dnode1 -s stop -x SIGINT