#
# MDEV-32738: Don't roll back high-priority transaction waiting on a lock in InnoDB.
#
# DML transactions on FK-child tables also get table locks on FK-parent tables.
# If there is a DML transaction holding such a lock, and a TOI transaction starts,
# the latter BF-aborts the former and puts itself into a waiting state.
# If at this moment another DML transaction on FK-child table starts, it doesn't
# check that the transaction waiting on a parent table lock is TOI, and it
# erroneously BF-aborts the waiting TOI transaction.
#
# The fix: check that the waiting transaction is TOI and in this case roll back
# the incoming DML transaction in InnoDB.
#
# The test runs with autocommit statement retry disabled.
#

--source include/galera_cluster.inc
--source include/have_debug_sync.inc
--source include/have_debug.inc

--connect con1_1,127.0.0.1,root,,test,$NODE_MYPORT_1
--connect con1_2,127.0.0.1,root,,test,$NODE_MYPORT_1

CREATE TABLE t1(c1 INT PRIMARY KEY) ENGINE=InnoDB;
CREATE TABLE t1_fk(c1 INT PRIMARY KEY, c2 INT, INDEX (c2), FOREIGN KEY (c2) REFERENCES t1(c1)) ENGINE=InnoDB;

INSERT INTO t1 VALUES (1);

--connection con1_1
SET DEBUG_SYNC = 'ib_after_row_insert WAIT_FOR bf_abort';
# INSERT also grabs FK-referenced table lock.
--send
  INSERT INTO t1_fk VALUES (1, 1);

--connection con1_2
SET DEBUG_SYNC = 'ha_write_row_start SIGNAL may_alter WAIT_FOR may_insert';
# Stop before doing anything, but pass wsrep_sync_wait().
# This should be done before ALTER enters TOI.
--send
  INSERT INTO t1_fk VALUES (2, 2);

--connection node_1
SET DEBUG_SYNC = 'now WAIT_FOR may_alter';
SET DEBUG_SYNC = 'after_lock_table_for_trx SIGNAL may_insert WAIT_FOR alter_continue';
# ALTER BF-aborts the first INSERT and lets the second INSERT continue.
--send
  ALTER TABLE t1 ADD COLUMN c2 INT;

--connection con1_1
# First INSERT gets BF-aborted.
--error ER_LOCK_DEADLOCK
--reap

--connection con1_2
# Second INSERT rolls back as ALTER is waiting on the lock.
--error ER_LOCK_DEADLOCK
--reap
SET DEBUG_SYNC = 'now SIGNAL alter_continue';

--connection node_1
# ALTER succeeds.
--reap

--connection node_2
# Sanity check that ALTER has been replicated.
INSERT INTO t1 (c1, c2) VALUES (2, 2);

# Cleanup.
--connection node_1
SET DEBUG_SYNC = 'RESET';
DROP TABLE t1_fk, t1;
--disconnect con1_1
--disconnect con1_2
--source include/galera_end.inc