mariadb/mysql-test/suite/sysschema/t/v_schema_table_lock_waits.test

-- source include/not_embedded.inc
-- source include/have_innodb.inc
-- source ../include/ps_truncate_all_tables.inc
# Tests for sys schema
# Verify the sys.schema_table_lock_waits view

# Ensure structure changes don't slip in
DESC sys.schema_table_lock_waits;

# Make sure view select does not error, but ignore results
--disable_result_log
SELECT * FROM sys.schema_table_lock_waits;
--enable_result_log


# Ensure structure changes don't slip in
DESC sys.x$schema_table_lock_waits;

# Make sure view select does not error, but ignore results
--disable_result_log
SELECT * FROM sys.x$schema_table_lock_waits;
--enable_result_log

# Ensure lock waits show up correctly
--connect(con1,localhost,root,,)
--connect(con2,localhost,root,,)

connection con1;
CREATE TABLE test.lock_waits (i INT PRIMARY KEY, j INT) ENGINE = InnoDB;
LOCK TABLE lock_waits WRITE;

connection con2;
send ALTER TABLE test.lock_waits ADD k VARCHAR(20);

connection default;
while (`SELECT COUNT(*)=0 FROM sys.schema_table_lock_waits`)
{
  --sleep 0.5
}
SELECT object_schema, object_name,
       waiting_account, waiting_lock_type, waiting_query,
       blocking_account, blocking_lock_type, blocking_lock_duration
  FROM sys.schema_table_lock_waits;

disconnect con1;

connection default;
while (`SELECT COUNT(*)<> 0 FROM sys.schema_table_lock_waits`)
{
  --sleep 0.5
}
disconnect con2;
connection default;

DROP TABLE test.lock_waits;