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MDEV-28965 Assertion failure when preparing UPDATE with derived table in WHERE

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This patch fixes not only the assertion failure in the function
Field_iterator_table_ref::set_field_iterator() but also:
 - fixes the problem of forced materialization of derived tables used
   in subqueries contained in WHERE clauses of single-table and multi-table
   UPDATE and DELETE statements
 - fixes the problem of MDEV-17954 that prevented execution of multi-table
   DELETE statements if they use in their WHERE clauses references to
   the tables that are updated.

The patch must be considered a complement to the patch for MDEV-28883.

Approved by Oleksandr Byelkin <sanja@mariadb.com>
This commit is contained in:
Igor Babaev
2022-07-11 16:57:37 -07:00
parent 3a9358a410
commit 88ca62dc68
27 changed files with 1106 additions and 79 deletions
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1
mysql-test/main/subselect_no_exists_to_in.result
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@ -638,7 +638,6 @@ a b
22 11
2 12
delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t12 where t11.a = t12.a);
ERROR HY000: Table 't12' is specified twice, both as a target for 'DELETE' and as a separate source for data
delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t2);
ERROR 21000: Subquery returns more than 1 row
delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t2 where t11.a = t2.a);