--source include/have_query_cache.inc
--source include/galera_cluster.inc
--source include/have_innodb.inc

#
# Ensure that the query cache behaves properly with respect to Galera
#
# * in the absence of updates, the query cache does serve cached results
# * any cache-invalidating query on the remote node also causes the local cache to be invalidated
#

CREATE TABLE t1 (id INT PRIMARY KEY) ENGINE=InnoDB;

INSERT INTO t1 VALUES (1);

--connection node_2
RESET QUERY CACHE;
FLUSH STATUS;

#
# 1. Cache works
#

SELECT COUNT(*) FROM t1;
SELECT VARIABLE_VALUE = 1 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'Qcache_queries_in_cache';

SELECT COUNT(*) FROM t1;
SELECT VARIABLE_VALUE = 1 FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'Qcache_hits';

#
# 2. Cache is invalidated by DML on remote node
#

--connection node_1
INSERT INTO t1 VALUES (2);

--connection node_2
FLUSH STATUS;

SELECT VARIABLE_VALUE = 0 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'Qcache_queries_in_cache';
SELECT COUNT(*) FROM t1;
SELECT VARIABLE_VALUE = 1 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'Qcache_queries_in_cache';

SELECT VARIABLE_VALUE = 0 FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'Qcache_hits';
SELECT COUNT(*) FROM t1;
SELECT VARIABLE_VALUE = 1 FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'Qcache_hits';

#
# 3. Cache is invalidated by DDL on remote node
#

--connection node_1
ALTER TABLE t1 ADD COLUMN f2 INTEGER;

--connection node_2
FLUSH STATUS;

SELECT VARIABLE_VALUE = 0 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'Qcache_queries_in_cache';
SELECT COUNT(*) FROM t1;
SELECT VARIABLE_VALUE = 1 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'Qcache_queries_in_cache';

SELECT VARIABLE_VALUE = 0 FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'Qcache_hits';
SELECT COUNT(*) FROM t1;
SELECT VARIABLE_VALUE = 1 FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'Qcache_hits';

DROP TABLE t1;