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mariadb/mysql-test/suite/innodb/t/innodb-alter-debug.test
Sergei Golubchik bead24b7f3 mariadb-test: wait on disconnect
Remove one of the major sources of race condiitons in mariadb-test.
Normally, mariadb_close() sends COM_QUIT to the server and immediately
disconnects. In mariadb-test it means the test can switch to another
connection and sends queries to the server before the server even
started parsing the COM_QUIT packet and these queries can see the
connection as fully active, as it didn't reach dispatch_command yet.

This is a major source of instability in tests and many - but not all,
still less than a half - tests employ workarounds. The correct one
is a pair count_sessions.inc/wait_until_count_sessions.inc.
Also very popular was wait_until_disconnected.inc, which was completely
useless, because it verifies that the connection is closed, and after
disconnect it always is, it didn't verify whether the server processed
COM_QUIT. Sadly the placebo was as widely used as the real thing.

Let's fix this by making mariadb-test `disconnect` command _to wait_ for
the server to confirm. This makes almost all workarounds redundant.

In some cases count_sessions.inc/wait_until_count_sessions.inc is still
needed, though, as only `disconnect` command is changed:

 * after external tools, like `exec $MYSQL`
 * after failed `connect` command
 * replication, after `STOP SLAVE`
 * Federated/CONNECT/SPIDER/etc after `DROP TABLE`

and also in some XA tests, because an XA transaction is dissociated from
the THD very late, after the server has closed the client connection.

Collateral cleanups: fix comments, remove some redundant statements:
 * DROP IF EXISTS if nothing is known to exist
 * DROP table/view before DROP DATABASE
 * REVOKE privileges before DROP USER
 etc
2025-07-16 09:14:33 +07:00

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--source include/innodb_page_size.inc
--source include/have_debug.inc
--source include/have_debug_sync.inc
SET NAMES utf8;
CREATE TABLE ① (
c1 INT PRIMARY KEY, c2 INT DEFAULT 1, ct TEXT, INDEX(c2))
ENGINE = InnoDB;
CREATE TABLE t1ć (c1 INT PRIMARY KEY, c2 INT, INDEX(c2),
CONSTRAINT t1c2 FOREIGN KEY (c2) REFERENCES ①(c2))
ENGINE=InnoDB;
INSERT INTO ① SET c1 = 1;
SET @saved_debug_dbug = @@SESSION.debug_dbug;
SET DEBUG_DBUG = '+d,ib_drop_foreign_error';
--error ER_RECORD_FILE_FULL
ALTER TABLE t1ć DROP FOREIGN KEY t1c2, RENAME TO ②;
SET DEBUG_DBUG = @saved_debug_dbug;
SET DEBUG_DBUG = '+d,ib_rename_column_error';
--error ER_RECORD_FILE_FULL
ALTER TABLE ① CHANGE c2 š INT;
SET DEBUG_DBUG = @saved_debug_dbug;
SHOW CREATE TABLE t1ć;
DROP TABLE t1ć, ①;
--echo #
--echo # Bug #21364096 THE BOGUS DUPLICATE KEY ERROR IN ONLINE DDL
--echo # WITH INCORRECT KEY NAME
create table t1 (id int auto_increment primary key, a int, unique key uk(a))
engine = innodb;
insert into t1 select 1, 1;
insert into t1 select 2, 2;
SET DEBUG_SYNC = 'row_log_table_apply1_before SIGNAL s1 WAIT_FOR s2';
--send alter table t1 force, add b int, ALGORITHM=inplace
--echo /* connection con1 */
connect (con1,localhost,root,,);
SET DEBUG_SYNC = 'now WAIT_FOR s1';
--error ER_DUP_ENTRY
insert into t1 select NULL, 1;
SET DEBUG_SYNC = 'now SIGNAL s2';
--echo /* connection default */
connection default;
--echo /* reap */ alter table t1 force, add b int, ALGORITHM=inplace;
--reap
SET DEBUG_SYNC = 'row_log_table_apply1_before SIGNAL s1 WAIT_FOR s2';
--send alter table t1 force, add c int, ALGORITHM=inplace;
--echo /* connection con1 */
connection con1;
set DEBUG_SYNC = 'now WAIT_FOR s1';
--error ER_DUP_ENTRY
update t1 set a=1 where id=2;
SET DEBUG_SYNC = 'now SIGNAL s2';
--echo /* connection default */
connection default;
--echo /* reap */ alter table t1 force, add b int, ALGORITHM=inplace;
--reap
SET DEBUG_SYNC = 'RESET';
drop table t1;
--echo #
--echo # Bug #27753193 ASSERTION `PREBUILT->TRX->ERROR_KEY_NUM <
--echo # HA_ALTER_INFO->KEY_COUNT'
CREATE TABLE t1 (a INT, UNIQUE KEY(a)) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1);
SET DEBUG_SYNC = 'row_log_table_apply1_before signal S1 WAIT_FOR S2';
send ALTER TABLE t1 FORCE, ALGORITHM=INPLACE;
connection con1;
SET DEBUG_SYNC = 'now WAIT_FOR S1';
--error ER_DUP_ENTRY
INSERT INTO t1 VALUES (1);
SET DEBUG_SYNC = 'now SIGNAL S2';
disconnect con1;
CONNECTION default;
reap;
SET DEBUG_SYNC='RESET';
DROP TABLE t1;
--echo #
--echo # MDEV-17470 Orphan temporary files after interrupted ALTER
--echo # cause InnoDB: Operating system error number 17 and eventual
--echo # fatal error 71
--echo #
CREATE TABLE t1 (pk INT AUTO_INCREMENT PRIMARY KEY, i INT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (NULL,1),(NULL,2),(NULL,3),(NULL,4),(NULL,5),(NULL,6),(NULL,7),(NULL,8);
INSERT INTO t1 SELECT NULL, i FROM t1;
INSERT INTO t1 SELECT NULL, i FROM t1;
INSERT INTO t1 SELECT NULL, i FROM t1;
INSERT INTO t1 SELECT NULL, i FROM t1;
INSERT INTO t1 SELECT NULL, i FROM t1;
LOCK TABLE t1 READ;
--connect (con1,localhost,root,,test)
let $ID= `SELECT @id := CONNECTION_ID()`;
send ALTER TABLE t1 FORCE, ALGORITHM=COPY;
--connection default
let $wait_condition= select 1 from information_schema.processlist where state='Waiting for table metadata lock';
source include/wait_condition.inc;
let $ignore= `SELECT @id := $ID`;
kill query @id;
--connection con1
--error ER_QUERY_INTERRUPTED
reap;
--disconnect con1
--connection default
UNLOCK TABLES;
DROP TABLE t1;
--echo #
--echo # MDEV-7318 RENAME INDEX
--echo #
CREATE TABLE t (c1 INT, c2 INT, KEY i2 (c2)) ENGINE=INNODB;
SET DEBUG_DBUG= '+d,ib_rename_index_fail1';
-- error ER_LOCK_DEADLOCK
ALTER TABLE t RENAME INDEX i2 to x, ALGORITHM=INPLACE;
SET DEBUG_DBUG = @saved_debug_dbug;
DROP TABLE t;
--echo #
--echo # MDEV-26772 InnoDB DDL fails with DUPLICATE KEY error
--echo #
create table t1(f1 int not null primary key,
f2 int not null, index idx(f2), index i(f2,f1))engine=innodb;
insert into t1 values(1, 1);
connect(con1,localhost,root,,,);
SET DEBUG_SYNC='before_delete_table_stats SIGNAL blocked WAIT_FOR go';
send SET STATEMENT innodb_lock_wait_timeout=0 FOR
ALTER TABLE t1 FORCE, ALGORITHM=COPY;
connection default;
SET DEBUG_SYNC='now WAIT_FOR blocked';
BEGIN;
SELECT * FROM mysql.innodb_table_stats FOR UPDATE;
SET DEBUG_SYNC='now SIGNAL go';
connection con1;
reap;
connection default;
COMMIT;
SET DEBUG_SYNC=RESET;
RENAME TABLE mysql.innodb_table_stats TO mysql.innodb_table_stats_hidden;
connection con1;
SET DEBUG_SYNC='innodb_commit_inplace_before_lock SIGNAL blocked WAIT_FOR go';
send ALTER TABLE t1 DROP INDEX i;
connection default;
SET DEBUG_SYNC='now WAIT_FOR blocked';
RENAME TABLE mysql.innodb_table_stats_hidden TO mysql.innodb_table_stats;
SET DEBUG_SYNC='now SIGNAL go';
connection con1;
reap;
connection default;
SET DEBUG_SYNC=RESET;
connection con1;
ALTER TABLE t1 RENAME KEY idx TO idx1, ALGORITHM=COPY;
disconnect con1;
connection default;
DROP TABLE t1;
--echo #
--echo # MDEV-26903 Assertion ctx->trx->state == TRX_STATE_ACTIVE on DROP INDEX
--echo #
CREATE TABLE t1(a INT PRIMARY KEY, b INT, INDEX(b)) ENGINE=InnoDB;
SET @save_dbug=@@debug_dbug;
SET debug_dbug='+d,deadlock_table_fail';
--error ER_LOCK_DEADLOCK
ALTER TABLE t1 DROP INDEX b, ALGORITHM=INPLACE;
SET debug_dbug=@save_dbug;
DROP TABLE t1;
--echo # End of 10.6 tests