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#
# Test of query rewrites and query cache.
#
SET sql_mode = 'PIPES_AS_CONCAT';
Warnings:
Warning	3090	Changing sql mode 'NO_AUTO_CREATE_USER' is deprecated. It will be removed in a future release.
SHOW VARIABLES LIKE '%query_cache%';
Variable_name	Value
have_query_cache	YES
query_cache_limit	1048576
query_cache_min_res_unit	4096
query_cache_size	1048576
query_cache_type	ON
query_cache_wlock_invalidate	OFF
FLUSH STATUS;
CREATE TABLE t1 ( a INT );
INSERT INTO t1 VALUES (1), (2), (3);
CREATE TABLE t2 ( a CHAR );
INSERT INTO t2 VALUES ('a'), ('b'), ('c');
SELECT * FROM t1;
a
1
2
3
SELECT * FROM t1;
a
1
2
3
SHOW STATUS LIKE "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
SHOW STATUS LIKE "Qcache_inserts";
Variable_name	Value
Qcache_inserts	1
SHOW STATUS LIKE "Qcache_hits";
Variable_name	Value
Qcache_hits	1
# Let's get this query cached, to make sure the cache is flushed when we
# load the rule below.
SELECT * FROM test.t1;
a
1
2
3
SHOW STATUS LIKE "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	2
FLUSH STATUS;
Warnings:
Warning	1681	'RESET QUERY CACHE' is deprecated and will be removed in a future release.
Warnings:
Warning	1681	'RESET QUERY CACHE' is deprecated and will be removed in a future release.
# Query rewrite plugin was installed.
INSERT INTO query_rewrite.rewrite_rules( pattern, replacement )
VALUES( 'SELECT * FROM test.t1', 'SELECT * FROM test.t2' );
CALL query_rewrite.flush_rewrite_rules();
Warnings:
Warning	1681	'RESET QUERY CACHE' is deprecated and will be removed in a future release.
SELECT @@query_cache_size;
@@query_cache_size
1048576
Warnings:
Warning	1287	'@@query_cache_size' is deprecated and will be removed in a future release.
# No matter what we do, this query should not get cached.
SELECT * FROM test.t1;
a
a
b
c
Warnings:
Note	1105	Query 'SELECT * FROM test.t1' rewritten to 'SELECT * FROM test.t2' by a query rewrite plugin
SELECT * FROM test.t1;
a
a
b
c
Warnings:
Note	1105	Query 'SELECT * FROM test.t1' rewritten to 'SELECT * FROM test.t2' by a query rewrite plugin
SHOW STATUS LIKE "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
SHOW STATUS LIKE "Qcache_inserts";
Variable_name	Value
Qcache_inserts	0
SHOW STATUS LIKE "Qcache_hits";
Variable_name	Value
Qcache_hits	0
DELETE FROM query_rewrite.rewrite_rules;
CALL query_rewrite.flush_rewrite_rules();
FLUSH STATUS;
SELECT * FROM test.t1;
a
1
2
3
SELECT * FROM test.t1;
a
1
2
3
SHOW STATUS LIKE "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
SHOW STATUS LIKE "Qcache_inserts";
Variable_name	Value
Qcache_inserts	1
SHOW STATUS LIKE "Qcache_hits";
Variable_name	Value
Qcache_hits	1
# Now let's define a syntactically correct rule followed by one with a
# syntax error. The query cache should still be cleared even if
# flush_rewrite_rules() exits with an error.
RESET QUERY CACHE;
Warnings:
Warning	1681	'RESET QUERY CACHE' is deprecated and will be removed in a future release.
DELETE FROM query_rewrite.rewrite_rules;
SELECT @@query_cache_size;
@@query_cache_size
1048576
Warnings:
Warning	1287	'@@query_cache_size' is deprecated and will be removed in a future release.
SELECT * FROM test.t1;
a
1
2
3
SELECT * FROM test.t1;
a
1
2
3
CALL mtr.add_suppression("Plugin rewriter reported: " ||
"'Some rules failed to load.'");
INSERT INTO query_rewrite.rewrite_rules( pattern, replacement )
VALUES ( 'SELECT * FROM test.t1', 'SELECT "rewritten"' ),
( 'This rule has syntax error', 'so it never gets rewritten' );
CALL query_rewrite.flush_rewrite_rules();
ERROR 45000: Loading of some rule(s) failed.
SELECT * FROM query_rewrite.rewrite_rules;
id	pattern	pattern_database	replacement	enabled	message
2	SELECT * FROM test.t1	NULL	SELECT "rewritten"	YES	NULL
3	This rule has syntax error	NULL	so it never gets rewritten	YES	Parse error in pattern: >>You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'This rule has syntax error' at line 1<<
FLUSH STATUS;
# The query matching the rule should be evicted from the cache.
SHOW STATUS LIKE "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
SHOW STATUS LIKE "Qcache_inserts";
Variable_name	Value
Qcache_inserts	0
SHOW STATUS LIKE "Qcache_hits";
Variable_name	Value
Qcache_hits	0
# The query would not get rewritten if it were still cached.
SELECT * FROM test.t1;
rewritten
rewritten
Warnings:
Note	1105	Query 'SELECT * FROM test.t1' rewritten to 'SELECT "rewritten"' by a query rewrite plugin
DELETE FROM query_rewrite.rewrite_rules;
Warnings:
Warning	1620	Plugin is busy and will be uninstalled on shutdown
# Query rewrite plugin was queued for uninstalling.
SELECT * FROM test.t1;
a
1
2
3
SELECT * FROM test.t1;
a
1
2
3
SHOW STATUS LIKE "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
SHOW STATUS LIKE "Qcache_inserts";
Variable_name	Value
Qcache_inserts	1
SHOW STATUS LIKE "Qcache_hits";
Variable_name	Value
Qcache_hits	1
DROP TABLE t1, t2;
SET GLOBAL query_cache_size = DEFAULT;
Warnings:
Warning	1287	'@@query_cache_size' is deprecated and will be removed in a future release.
#
# Reinstalls the plugin while keeping the rules table.
#
CREATE TABLE t1 ( c1 VARCHAR(10), c2 VARCHAR(10) );
INSERT INTO t1 VALUES ( 'abc', 'def' ), ( 'ghi', 'klm' ), ( 'nop', 'qrs' );
CREATE TABLE t2 ( c1 VARCHAR(10) );
INSERT INTO t2 VALUES ( 'abc' ), ( 'klm' );
Warnings:
Warning	1681	'RESET QUERY CACHE' is deprecated and will be removed in a future release.
Warnings:
Warning	1681	'RESET QUERY CACHE' is deprecated and will be removed in a future release.
# Query rewrite plugin was installed.
# Insert some rewrite rules in the plugin
INSERT INTO query_rewrite.rewrite_rules ( pattern, replacement )
VALUES ( 'SELECT * FROM test.t2',
'SELECT * FROM test.t1 JOIN test.t2 ON test.t1.c1 = test.t2.c1' );
CALL query_rewrite.flush_rewrite_rules();
Warnings:
Warning	1681	'RESET QUERY CACHE' is deprecated and will be removed in a future release.
# Check a query that doesn't have a rewrite rule doesn't get rewritten.
SELECT c2 FROM test.t1;
c2
def
klm
qrs
# Check that we can execute a rewrite rule.
SELECT * FROM test.t2;
c1	c2	c1
abc	def	abc
Warnings:
Note	1105	Query 'SELECT * FROM test.t2' rewritten to 'SELECT * FROM test.t1 JOIN test.t2 ON test.t1.c1 = test.t2.c1' by a query rewrite plugin
DROP PROCEDURE query_rewrite.flush_rewrite_rules;
DROP FUNCTION load_rewrite_rules;
UNINSTALL PLUGIN rewriter;
Warnings:
Warning	1620	Plugin is busy and will be uninstalled on shutdown
# Check that the table is still present and didn't get dropped.
SELECT pattern, replacement FROM query_rewrite.rewrite_rules;
pattern	replacement
SELECT * FROM test.t2	SELECT * FROM test.t1 JOIN test.t2 ON test.t1.c1 = test.t2.c1
# Check that when the plugin is inactive the queries don't get rewritten.
SELECT * FROM test.t2;
c1
abc
klm
# Reinstall the plugin. All the rules should still be here from the
# previous installation.
Warnings:
Note	1007	Can't create database 'query_rewrite'; database exists
Warnings:
Note	1050	Table 'rewrite_rules' already exists
Warnings:
Warning	1681	'RESET QUERY CACHE' is deprecated and will be removed in a future release.
Warnings:
Warning	1681	'RESET QUERY CACHE' is deprecated and will be removed in a future release.
# Query rewrite plugin was installed.
# Check that a query that doesn't have a rewrite rule doesn't get
# rewritten.
SELECT c2 FROM test.t1;
c2
def
klm
qrs
# Check that we can still execute a rewrite rule.
SELECT * FROM test.t2;
c1	c2	c1
abc	def	abc
Warnings:
Note	1105	Query 'SELECT * FROM test.t2' rewritten to 'SELECT * FROM test.t1 JOIN test.t2 ON test.t1.c1 = test.t2.c1' by a query rewrite plugin
DROP TABLE t1, t2;
Warnings:
Warning	1620	Plugin is busy and will be uninstalled on shutdown
# Query rewrite plugin was queued for uninstalling.
SET sql_mode = DEFAULT;