MDEV-30586 DELETE with aggregation in subquery of WHERE returns bogus error

The parser code for single-table DELETE missed the call of the function
LEX::check_main_unit_semantics(). As a result the the field nested level
of SELECT_LEX structures remained set 0 for all non-top level selects.
This could lead to different kind of problems. In particular this did not
allow to determine properly the selects where set functions had to be
aggregated when they were used in inner subqueries.

Approved by Oleksandr Byelkin <sanja@mariadb.com>

mysql-test/main/delete.test

@@ -582,3 +582,44 @@ DELETE v2 FROM v2;
 
 DROP VIEW v2, v1;
 DROP TABLE t1, t2;
+
+--echo End of 5.5 tests
+
+--echo #
+--echo # MDEV-30586: DELETE with WHERE containing nested subquery
+--echo #             with set function aggregated in outer subquery
+--echo #
+
+create table t1 (a int);
+insert into t1 values (3), (7), (1);
+
+create table t2 (b int);
+insert into t2 values (2), (1), (4), (7);
+
+create table t3 (a int, b int);
+insert into t3 values (2,10), (7,30), (2,30), (1,10), (7,40);
+
+let $c=
+        t1.a in (select t3.a from t3 group by t3.a
+                   having t3.a > any (select t2.b from t2
+                                        where t2.b*10 < sum(t3.b)));
+
+eval
+select * from t1
+  where $c;
+
+eval
+delete from t1
+  where $c;
+
+eval
+select * from t1
+  where $c;
+
+eval
+update t1 set t1.a=t1.a+10
+  where $c;
+
+drop table t1,t2,t3;
+
+--echo End of 10.4 tests