[MDEV-22820] Bogus "Unknown table" warnings produced upon attempt to drop parent table referenced by FK - Jira

--source include/have_innodb.inc

create table t1 (a int, key(a)) engine=InnoDB;

create table t2 (b int, foreign key(b) references t1(a)) engine=InnoDB;

--error ER_ROW_IS_REFERENCED_2

drop table if exists t1;

show warnings;

# Cleanup

drop table t2, t1;

Before the change, failed DROP TABLE only produced one relevant error:

10.5
drop table if exists t1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails
show warnings;
Level Code Message
Error 1451 Cannot delete or update a parent row: a foreign key constraint fails

With ~~MDEV-11412~~ as of bb-10.5-monty 645f37e49:

drop table if exists t1;

ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails

show warnings;

Level	Code	Message

Error	1451	Cannot delete or update a parent row: a foreign key constraint fails

Warning	1051	Unknown table 'test.t1'

Error	1051	Unknown table 'test.t1'

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