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--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;
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