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# This test aims to rewrite queries with parameters in many
# different places.
CREATE TABLE t1 ( c1 INTEGER, c2 CHAR(1), c3 CHAR(1) );
INSERT INTO t1 VALUES ( 1, 'd', 'a' ),
( 3, 'c', 'b' ),
( 2, 'b', 'c' ),
( 4, 'a', 'a' ),
( 6, 'd', 'b' ),
( 5, 'f', 'c' ),
( 8, 'd', 'a' ),
( 7, 'e', 'b' );
# Query rewrite plugin was installed.
INSERT INTO query_rewrite.rewrite_rules ( pattern, replacement )
VALUES ( 'SELECT c1, c2 FROM test.t1 ORDER BY ?',
'SELECT c1, c2 FROM test.t1 ORDER BY 2, ? DESC' );
CALL query_rewrite.flush_rewrite_rules();
# Should be rewritten.
SELECT c1, c2 FROM test.t1 ORDER BY 1;
c1 c2
4 a
2 b
3 c
8 d
6 d
1 d
7 e
5 f
Warnings:
Note 1105 Query 'SELECT c1, c2 FROM test.t1 ORDER BY 1' rewritten to 'SELECT c1, c2 FROM test.t1 ORDER BY 2, 1 DESC' by a query rewrite plugin
# Should not be rewritten.
SELECT c1, c2 FROM test.t1 ORDER BY c1;
c1 c2
1 d
2 b
3 c
4 a
5 f
6 d
7 e
8 d
INSERT INTO query_rewrite.rewrite_rules ( pattern, replacement )
VALUES ( 'SELECT c1, c2 FROM test.t1 LIMIT ?',
'SELECT c1, c2 FROM test.t1 ORDER BY 1 LIMIT 1, ?' );
CALL query_rewrite.flush_rewrite_rules();
# Should be rewritten.
SELECT c1, c2 FROM test.t1 LIMIT 2;
c1 c2
2 b
3 c
Warnings:
Note 1105 Query 'SELECT c1, c2 FROM test.t1 LIMIT 2' rewritten to 'SELECT c1, c2 FROM test.t1 ORDER BY 1 LIMIT 1, 2' by a query rewrite plugin
# Should be rewritten.
SELECT c1, c2 FROM test.t1 LIMIT 4;
c1 c2
2 b
3 c
4 a
5 f
Warnings:
Note 1105 Query 'SELECT c1, c2 FROM test.t1 LIMIT 4' rewritten to 'SELECT c1, c2 FROM test.t1 ORDER BY 1 LIMIT 1, 4' by a query rewrite plugin
# Should not be rewritten.
SELECT c1, c2 FROM test.t1 LIMIT 2, 1;
c1 c2
2 b
INSERT INTO query_rewrite.rewrite_rules ( pattern, replacement )
VALUES ( 'SELECT c1 + ? AS c FROM test.t1',
'SELECT c1 + ? * 2 AS c FROM test.t1 ORDER BY c' );
CALL query_rewrite.flush_rewrite_rules();
# Should be rewritten.
SELECT c1 + 3 AS c FROM test.t1;
c
7
8
9
10
11
12
13
14
Warnings:
Note 1105 Query 'SELECT c1 + 3 AS c FROM test.t1' rewritten to 'SELECT c1 + 3 * 2 AS c FROM test.t1 ORDER BY c' by a query rewrite plugin
# Should be rewritten.
SELECT c1 + 20 AS c FROM test.t1;
c
41
42
43
44
45
46
47
48
Warnings:
Note 1105 Query 'SELECT c1 + 20 AS c FROM test.t1' rewritten to 'SELECT c1 + 20 * 2 AS c FROM test.t1 ORDER BY c' by a query rewrite plugin
# Should not be rewritten.
SELECT c1 + 3 * 2 AS c FROM test.t1;
c
7
9
8
10
12
11
14
13
INSERT INTO query_rewrite.rewrite_rules ( pattern, replacement )
VALUES ( 'SELECT c1 * ? FROM test.t1', 'SELECT c1 + ? FROM test.t1' );
CALL query_rewrite.flush_rewrite_rules();
# Should be rewritten.
SELECT c1 * 3 FROM test.t1;
c1 + 3
4
6
5
7
9
8
11
10
Warnings:
Note 1105 Query 'SELECT c1 * 3 FROM test.t1' rewritten to 'SELECT c1 + 3 FROM test.t1' by a query rewrite plugin
# Should not be rewritten.
SELECT c1 + 3 FROM test.t1;
c1 + 3
4
6
5
7
9
8
11
10
INSERT INTO query_rewrite.rewrite_rules ( pattern, replacement )
VALUES ( 'SELECT COUNT( c1 ), c2, c3 FROM test.t1 GROUP BY ?, ?',
'SELECT SUM( c1 ), c2, c3 FROM test.t1 GROUP BY ?, ?' );
CALL query_rewrite.flush_rewrite_rules();
# Should be rewritten.
SELECT COUNT( c1 ), c2, c3 FROM test.t1 GROUP BY 2, 3;
SUM( c1 ) c2 c3
2 b c
3 c b
4 a a
5 f c
6 d b
7 e b
9 d a
Note 1105 Query 'SELECT COUNT( c1 ), c2, c3 FROM test.t1 GROUP BY 2, 3' rewritten to 'SELECT SUM( c1 ), c2, c3 FROM test.t1 GROUP BY 2, 3' by a query rewrite plugin
Warnings:
# Should be rewritten.
SELECT COUNT( c1 ), c2, c3 FROM test.t1 GROUP BY 3, 2;
SUM( c1 ) c2 c3
2 b c
3 c b
4 a a
5 f c
6 d b
7 e b
9 d a
Note 1105 Query 'SELECT COUNT( c1 ), c2, c3 FROM test.t1 GROUP BY 3, 2' rewritten to 'SELECT SUM( c1 ), c2, c3 FROM test.t1 GROUP BY 3, 2' by a query rewrite plugin
Warnings:
# Should not be rewritten.
SELECT COUNT( c1 ), c2, c3 FROM test.t1 GROUP BY c2, c3;
COUNT( c1 ) c2 c3
1 a a
1 b c
1 c b
1 d b
1 e b
1 f c
2 d a
INSERT INTO query_rewrite.rewrite_rules ( pattern, replacement )
VALUES ( 'SELECT COUNT(c1) as c, c2, c3 FROM test.t1 GROUP BY ?, ? HAVING c > ?',
'SELECT COUNT(c1) as c, c2, c3 FROM test.t1 GROUP BY ?, ? HAVING c < ?'
);
CALL query_rewrite.flush_rewrite_rules();
SELECT COUNT( c1 ) as c, c2, c3 FROM test.t1 GROUP BY 2, 3 HAVING c > 2;
c c2 c3
1 a a
1 b c
1 c b
1 d b
1 e b
1 f c
Note 1105 Query 'SELECT COUNT( c1 ) as c, c2, c3 FROM test.t1 GROUP BY 2, 3 HAVING c > 2' rewritten to 'SELECT COUNT(c1) as c, c2, c3 FROM test.t1 GROUP BY 2, 3 HAVING c < 2' by a query rewrite plugin
Warnings:
SELECT COUNT( c1 ) as c, c2, c3 FROM test.t1 GROUP BY 3, 2 HAVING c > 3;
c c2 c3
1 a a
1 b c
1 c b
1 d b
1 e b
1 f c
2 d a
Note 1105 Query 'SELECT COUNT( c1 ) as c, c2, c3 FROM test.t1 GROUP BY 3, 2 HAVING c > 3' rewritten to 'SELECT COUNT(c1) as c, c2, c3 FROM test.t1 GROUP BY 3, 2 HAVING c < 3' by a query rewrite plugin
Warnings:
CREATE TABLE t2 ( c1 INTEGER, c2 CHAR ( 1 ), c3 CHAR ( 1 ) );
INSERT INTO t2 VALUES ( 1, 'd', 'a' ),
( 2, 'b', 'c' ),
( 6, 'd', 'b' ),
( 5, 'f', 'c' );
INSERT INTO query_rewrite.rewrite_rules ( pattern, replacement )
VALUES ( 'SELECT c.c1, c.c2 FROM test.t1 AS c JOIN test.t2 AS d ON(c.c1=d.c1)WHERE c.c1=1',
'SELECT c.c1, c.c2 FROM test.t1 AS c JOIN test.t2 AS d ON ( c.c1=d.c1 )' );
CALL query_rewrite.flush_rewrite_rules();
SELECT c.c1, c.c2 FROM test.t1 AS c JOIN test.t2 AS d ON ( c.c1=d.c1 ) WHERE c.c1=1;
c1 c2
1 d
2 b
6 d
5 f
Warnings:
Note 1105 Query 'SELECT c.c1, c.c2 FROM test.t1 AS c JOIN test.t2 AS d ON ( c.c1=d.c1 ) WHERE c.c1=1' rewritten to 'SELECT c.c1, c.c2 FROM test.t1 AS c JOIN test.t2 AS d ON ( c.c1=d.c1 )' by a query rewrite plugin
SELECT c.c1, c.c2 FROM test.t1 AS d JOIN test.t2 AS c ON ( c.c1=d.c1 ) WHERE c.c1=1;
c1 c2
1 d
# Finish extraction in the from clause.
INSERT INTO query_rewrite.rewrite_rules ( pattern, replacement )
VALUES ( 'SELECT c.c1 FROM ( SELECT c1 FROM test.t1 WHERE c1=? ) c',
'SELECT c1 FROM test.t1 WHERE c1=?' );
CALL query_rewrite.flush_rewrite_rules();
SELECT c.c1 FROM ( SELECT c1 FROM test.t1 WHERE c1=3 ) c;
c1
3
Warnings:
Note 1105 Query 'SELECT c.c1 FROM ( SELECT c1 FROM test.t1 WHERE c1=3 ) c' rewritten to 'SELECT c1 FROM test.t1 WHERE c1=3' by a query rewrite plugin
SET sql_mode = 'PIPES_AS_CONCAT';
INSERT INTO query_rewrite.rewrite_rules ( pattern, replacement )
VALUES ( 'SELECT c1,c2,c3 FROM test.t1 WHERE c1=? ' ||
'UNION ' ||
'SELECT c1 FROM test.t1 WHERE c1=? ORDER BY ?',
'SELECT c1,c2, c3 FROM test.t1 WHERE c1 IN ( ?,? ) ORDER BY ?' );
CALL query_rewrite.flush_rewrite_rules();
# That's right, query does not compile unless rewritten.
SELECT c1, c2, c3 FROM test.t1 WHERE c1 = 1
UNION
SELECT c1 FROM test.t1 WHERE c1 = 2 ORDER BY 2;
c1 c2 c3
2 b c
1 d a
Warnings:
Note 1105 Query 'SELECT c1, c2, c3 FROM test.t1 WHERE c1 = 1
UNION
SELECT c1 FROM test.t1 WHERE c1 = 2 ORDER BY 2' rewritten to 'SELECT c1,c2, c3 FROM test.t1 WHERE c1 IN ( 1,2 ) ORDER BY 2' by a query rewrite plugin
# Test with many parameters.
INSERT INTO query_rewrite.rewrite_rules ( pattern, replacement )
VALUES ( 'SELECT c1, c2 FROM test.t1 WHERE c1 IN ' ||
'( ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ? )',
'SELECT c1, c2 FROM test.t1 WHERE c1 NOT IN ' ||
'( ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ? )' );
CALL query_rewrite.flush_rewrite_rules();
SELECT c1, c2
FROM test.t1
WHERE c1 IN ( 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14 );
c1 c2
6 d
Warnings:
Note 1105 Query 'SELECT c1, c2
FROM test.t1
WHERE c1 IN ( 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14 )' rewritten to 'SELECT c1, c2 FROM test.t1 WHERE c1 NOT IN ( 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14 )' by a query rewrite plugin
INSERT INTO query_rewrite.rewrite_rules ( pattern, replacement )
VALUES ( 'SELECT test.t1.c1, ( SELECT c1 FROM test.t2 WHERE c1=? ) t'
' FROM test.t1, '
' ( SELECT * FROM ( SELECT * FROM test.t2 WHERE c1=? ) tb ) tc'
' WHERE test.t1.c2=tc.c2 AND tc.c1 < ?',
'SELECT test.t1.c1, test.t2.c1, test.t2.c2, test.t1.c2'
' FROM test.t1 JOIN test.t2 ON ( test.t1.c1=t2.c1 AND test.t2.c1 IN ( ?, ? ) )'
' WHERE test.t1.c1 > ?' );
CALL query_rewrite.flush_rewrite_rules();
SELECT test.t1.c1, ( SELECT c1 FROM test.t2 WHERE c1=2 ) t
FROM test.t1,
( SELECT * FROM ( SELECT * FROM test.t2 WHERE c1=1 ) tb ) tc
WHERE test.t1.c2=tc.c2 AND tc.c1 < 0;
c1 c1 c2 c2
1 1 d d
2 2 b b
Warnings:
Note 1105 Query 'SELECT test.t1.c1, ( SELECT c1 FROM test.t2 WHERE c1=2 ) t
FROM test.t1,
( SELECT * FROM ( SELECT * FROM test.t2 WHERE c1=1 ) tb ) tc
WHERE test.t1.c2=tc.c2 AND tc.c1 < 0' rewritten to 'SELECT test.t1.c1, test.t2.c1, test.t2.c2, test.t1.c2 FROM test.t1 JOIN test.t2 ON ( test.t1.c1=t2.c1 AND test.t2.c1 IN ( 2, 1 ) ) WHERE test.t1.c1 > 0' by a query rewrite plugin
# Check our status variables:.
SHOW STATUS LIKE 'Rewriter%';
Variable_name Value
Rewriter_number_loaded_rules 11
Rewriter_number_reloads 12
Rewriter_number_rewritten_queries 15
Rewriter_reload_error OFF
DROP TABLE t1, t2;
SET sql_mode = DEFAULT;
Warnings:
Warning 1620 Plugin is busy and will be uninstalled on shutdown
# Query rewrite plugin was queued for uninstalling.
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