mariadb/mysql-test/suite/innodb/t/table_definition_cache_debug.test

--source include/have_innodb.inc
--source include/have_debug.inc
--source include/have_debug_sync.inc
# This test is slow on buildbot.
--source include/big_test.inc

call mtr.add_suppression("InnoDB: innodb_open_files=13 is exceeded");

SET @save_tdc= @@GLOBAL.table_definition_cache;
SET @save_toc= @@GLOBAL.table_open_cache;

# InnoDB plugin essentially ignores table_definition_cache size
# and hard-wires it to 400, which also is the minimum allowed value.
SET GLOBAL table_definition_cache= 400;
SET GLOBAL table_open_cache= 1024;

CREATE TABLE to_be_evicted(a INT PRIMARY KEY, b INT NOT NULL) ENGINE=InnoDB;
INSERT INTO to_be_evicted VALUES(1,2),(2,1);

connect(ddl,localhost,root,,);
SET DEBUG_SYNC = 'row_log_apply_before SIGNAL scanned WAIT_FOR got_duplicate';
--send
ALTER TABLE to_be_evicted ADD UNIQUE INDEX(b);

connection default;
SET DEBUG_SYNC = 'now WAIT_FOR scanned';

# During the ADD UNIQUE INDEX, start a transaction that inserts a duplicate
# and then hogs the table lock, so that the unique index cannot be dropped.
BEGIN;
INSERT INTO to_be_evicted VALUES(3, 2);
SET DEBUG_SYNC = 'now SIGNAL got_duplicate';

connection ddl;
--error ER_DUP_ENTRY
reap;

disconnect ddl;
connection default;
# Release the table lock.
COMMIT;
SET DEBUG_SYNC = RESET;

# Allow cache eviction.
FLUSH TABLES;
--disable_query_log

# Pollute the cache with many tables, so that our table will be evicted.
let $N=1000;
let $loop=$N;
while ($loop)
{
  eval CREATE TABLE t_$loop(id INT)ENGINE=InnoDB;
  dec $loop;
}

# Hopefully let InnoDB evict the tables.
sleep 10;

let $loop=$N;
while ($loop)
{
  eval DROP TABLE t_$loop;
  dec $loop;
}

SET GLOBAL table_definition_cache= @save_tdc;
SET GLOBAL table_open_cache= @save_toc;

DROP TABLE to_be_evicted;