MDEV-26470 "No database" selected when using CTE in a subquery of DEL…

…ETE statement

This bug led to reporting bogus messages "No database selected" for DELETE
statements if they used subqueries in their WHERE conditions and these
subqueries contained references to CTEs.
The bug happened because the grammar rule for DELETE statement did not
call the function LEX::check_cte_dependencies_and_resolve_references() and
as a result of it references to CTEs were not identified as such.

Approved by Oleksandr Byelkin <sanja@mariadb.com>

mysql-test/r/cte_nonrecursive.result

@@ -2162,4 +2162,26 @@ a
 1
 3
 drop table t1,t2;
+#
+# MDEV-26470: CTE in WITH clause of subquery used in DELETE
+#
+create table t1 (a int);
+insert into t1 values (3), (7), (1), (5);
+create table t2 (b int);
+insert into t2 values (4), (1), (3), (2);
+delete from t1
+where a in (with cte(a) as (select * from t2 where b <=2) select a from cte);
+select * from t1;
+a
+3
+7
+5
+insert into t1 values (1), (3);
+delete t1 from t1, t2
+where t1.a=t2.b or
+t1.a in (with cte(a) as (select b+1 from t2) select * from cte);
+select * from t1;
+a
+7
+drop table t1,t2;
 # End of 10.2 tests

mysql-test/t/cte_nonrecursive.test

@@ -1601,4 +1601,27 @@ select * from t2;
 
 drop table t1,t2;
 
+--echo #
+--echo # MDEV-26470: CTE in WITH clause of subquery used in DELETE
+--echo #
+
+create table t1 (a int);
+insert into t1 values (3), (7), (1), (5);
+
+create table t2 (b int);
+insert into t2 values (4), (1), (3), (2);
+
+delete from t1
+  where a in (with cte(a) as (select * from t2 where b <=2) select a from cte);
+select * from t1;
+
+insert into t1 values (1), (3);
+
+delete t1 from t1, t2
+  where t1.a=t2.b or
+        t1.a in (with cte(a) as (select b+1 from t2) select * from cte);
+select * from t1;
+
+drop table t1,t2;
+
 --echo # End of 10.2 tests

sql/sql_yacc.yy

@@ -12668,6 +12668,10 @@ delete:
             lex->select_lex.init_order();
           }
           opt_delete_options single_multi
+          {
+            if (Lex->check_cte_dependencies_and_resolve_references())
+              MYSQL_YYABORT;
+          }
         ;
 
 single_multi: