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

--source include/have_innodb.inc
--source include/have_debug.inc
--source include/count_sessions.inc

CREATE TABLE t (
  `a` INT NOT NULL,
  `b` INT NOT NULL,
  PRIMARY KEY (`a`)
) ENGINE=InnoDB;

--disable_query_log
SET @old_innodb_limit_optimistic_insert_debug = @@innodb_limit_optimistic_insert_debug;
--enable_query_log

SET GLOBAL innodb_limit_optimistic_insert_debug = 3;

INSERT INTO t VALUES(10, 0);
INSERT INTO t VALUES(20, 0);
INSERT INTO t VALUES(30, 0);

SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
XA START '1';
REPLACE INTO t VALUES(10, 1);
REPLACE INTO t VALUES(20, 1);

# We need the following sync point because mysql_insert() resets
# trx->duplicates with the following condition:
#
#  if (duplic == DUP_REPLACE &&
#      (!table->triggers || !table->triggers->has_delete_triggers()))
#    table->file->extra(HA_EXTRA_WRITE_CANNOT_REPLACE);
#
# and ha_innobase::extra() resets trx_t::duplicates, but we need
# lock_update_split_right() to be invoked when trx->duplicates is set to
# repeat the bug. So the transaction will hang just after
# row_insert_for_mysql() call until another transaction inserts new row and
# splits the page.
SET DEBUG_SYNC= 'ib_after_row_insert SIGNAL inserted WAIT_FOR cont';
--send REPLACE INTO t VALUES(30, 1)

connect (con1,localhost,root);
SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
XA START '2';
SET DEBUG_SYNC= 'now WAIT_FOR inserted';
# The following statement will cause page split and (20, ...) will be split
# record. As the previous REPLACE set non-gap X-lock on it,
# lock_update_split_right() and lock_rec_inherit_to_gap() will 'inherit' the
# lock from the very first (20, ...) new right page record to the supremum of
# the old left page, what should not be for READ COMMITTED isolation level
INSERT INTO t VALUES(40, 2);
SET DEBUG_SYNC= 'now SIGNAL cont';

--connection default
--reap
XA END '1';
# This will cause the assertion failure, because the supremum of the left page
# has X-lock.
XA PREPARE '1';
--connection default
XA COMMIT '1';

--connection con1
XA END '2';
XA PREPARE '2';
XA COMMIT '2';
--disconnect con1

--connection default
SET DEBUG_SYNC= "RESET";
DROP TABLE t;

--disable_query_log
SET GLOBAL innodb_limit_optimistic_insert_debug = @old_innodb_limit_optimistic_insert_debug;
--enable_query_log

--source include/wait_until_count_sessions.inc