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#
# Checks the basic functionality of the plugin.
#
# Query rewrite plugin was installed.
# checks that the plugin is well installed
SELECT PLUGIN_NAME, PLUGIN_TYPE
FROM information_schema.plugins
WHERE plugin_name = 'Rewriter';
PLUGIN_NAME PLUGIN_TYPE
Rewriter AUDIT
CREATE TABLE t1 ( a VARCHAR(10), b VARCHAR(10) );
INSERT INTO t1 VALUES ( 'abc', 'def' ), ( 'ghi', 'klm' ), ( 'nop', 'qrs' );
CREATE TABLE t2 ( a VARCHAR(10) );
INSERT INTO t2 VALUES ( 'abc' ), ( 'klm' );
# Test of literals matching.
INSERT INTO query_rewrite.rewrite_rules ( pattern, replacement )
VALUES ( 'SELECT ?', 'SELECT "literal"' );
SELECT * FROM query_rewrite.rewrite_rules;
id pattern pattern_database replacement enabled message
1 SELECT ? NULL SELECT "literal" YES NULL
CALL query_rewrite.flush_rewrite_rules();
SELECT * FROM query_rewrite.rewrite_rules;
id pattern pattern_database replacement enabled message
1 SELECT ? NULL SELECT "literal" YES NULL
SELECT NULL;
literal
literal
Warnings:
Note 1105 Query 'SELECT NULL' rewritten to 'SELECT "literal"' by a query rewrite plugin
SELECT 'abc';
literal
literal
Warnings:
Note 1105 Query 'SELECT 'abc'' rewritten to 'SELECT "literal"' by a query rewrite plugin
SELECT 1;
literal
literal
Warnings:
Note 1105 Query 'SELECT 1' rewritten to 'SELECT "literal"' by a query rewrite plugin
SELECT 1.1;
literal
literal
Warnings:
Note 1105 Query 'SELECT 1.1' rewritten to 'SELECT "literal"' by a query rewrite plugin
SELECT 123456789123456789123456789123456789123456789123456789;
literal
literal
Warnings:
Note 1105 Query 'SELECT 123456789123456789123456789123456789123456789123456789' rewritten to 'SELECT "literal"' by a query rewrite plugin
# Check our status variables.
SHOW STATUS LIKE 'Rewriter%';
Variable_name Value
Rewriter_number_loaded_rules 1
Rewriter_number_reloads 2
Rewriter_number_rewritten_queries 5
Rewriter_reload_error OFF
DELETE FROM query_rewrite.rewrite_rules;
INSERT INTO query_rewrite.rewrite_rules ( pattern, replacement )
VALUES ( 'SELECT * FROM test.t1 WHERE ( a = ? AND TRUE ) OR b = ?',
'SELECT a FROM test.t1 WHERE a = ?' ),
( 'SELECT a FROM test.t1',
'SELECT * FROM test.t1 WHERE a = \'abc\'' ),
( 'SELECT a FROM test.t1 WHERE b = ?',
'SELECT * FROM test.t1 WHERE b = ?' ),
( 'SELECT * FROM test.t2',
'SELECT * FROM test.t1 JOIN test.t2 ON t1.a = t2.a' ),
( 'SELECT * FROM test.t1 WHERE a = ? OR b = ?',
'SELECT * FROM test.t1 WHERE b = ? OR a = ?' );
SELECT * FROM query_rewrite.rewrite_rules;
id pattern pattern_database replacement enabled message
2 SELECT * FROM test.t1 WHERE ( a = ? AND TRUE ) OR b = ? NULL SELECT a FROM test.t1 WHERE a = ? YES NULL
3 SELECT a FROM test.t1 NULL SELECT * FROM test.t1 WHERE a = 'abc' YES NULL
4 SELECT a FROM test.t1 WHERE b = ? NULL SELECT * FROM test.t1 WHERE b = ? YES NULL
5 SELECT * FROM test.t2 NULL SELECT * FROM test.t1 JOIN test.t2 ON t1.a = t2.a YES NULL
6 SELECT * FROM test.t1 WHERE a = ? OR b = ? NULL SELECT * FROM test.t1 WHERE b = ? OR a = ? YES NULL
CALL query_rewrite.flush_rewrite_rules();
SELECT * FROM query_rewrite.rewrite_rules;
id pattern pattern_database replacement enabled message
2 SELECT * FROM test.t1 WHERE ( a = ? AND TRUE ) OR b = ? NULL SELECT a FROM test.t1 WHERE a = ? YES NULL
3 SELECT a FROM test.t1 NULL SELECT * FROM test.t1 WHERE a = 'abc' YES NULL
4 SELECT a FROM test.t1 WHERE b = ? NULL SELECT * FROM test.t1 WHERE b = ? YES NULL
5 SELECT * FROM test.t2 NULL SELECT * FROM test.t1 JOIN test.t2 ON t1.a = t2.a YES NULL
6 SELECT * FROM test.t1 WHERE a = ? OR b = ? NULL SELECT * FROM test.t1 WHERE b = ? OR a = ? YES NULL
# Check a query that doesn't have a rewrite rule doesn't get rewritten.
SELECT b FROM test.t1;
b
def
klm
qrs
# Check a query with just one parameter.
SELECT a FROM test.t1 WHERE b = 'qrs';
a b
nop qrs
Warnings:
Note 1105 Query 'SELECT a FROM test.t1 WHERE b = 'qrs'' rewritten to 'SELECT * FROM test.t1 WHERE b = 'qrs'' by a query rewrite plugin
# Check a rule with parameter truncation (fewer parameters in the
# output query than in the input query);
SELECT * FROM test.t1 WHERE ( a = 'abc' AND TRUE ) OR b = 'klm';
a
abc
Warnings:
Note 1105 Query 'SELECT * FROM test.t1 WHERE ( a = 'abc' AND TRUE ) OR b = 'klm'' rewritten to 'SELECT a FROM test.t1 WHERE a = 'abc'' by a query rewrite plugin
SELECT * FROM test.t1 WHERE ( a = 'abc' AND FALSE ) OR b = 'klm';
a b
ghi klm
# Check a non parameterized query.
SELECT * from t1 WHERE a = 'abc';
a b
abc def
# Check that a non-rewritten query does not yield a warning.
SELECT b FROM test.t1;
b
def
klm
qrs
# Check that a query is not rewritten if the query corresponds to a
# replacement.
SELECT a FROM test.t1;
a b
abc def
Warnings:
Note 1105 Query 'SELECT a FROM test.t1' rewritten to 'SELECT * FROM test.t1 WHERE a = 'abc'' by a query rewrite plugin
# Check that we can execute a rewrite more than once.
SELECT * FROM test.t2;
a b a
abc def abc
Warnings:
Note 1105 Query 'SELECT * FROM test.t2' rewritten to 'SELECT * FROM test.t1 JOIN test.t2 ON t1.a = t2.a' by a query rewrite plugin
SELECT * FROM test.t2;
a b a
abc def abc
Warnings:
Note 1105 Query 'SELECT * FROM test.t2' rewritten to 'SELECT * FROM test.t1 JOIN test.t2 ON t1.a = t2.a' by a query rewrite plugin
# Remove the warnings.
SELECT b FROM test.t1;
b
def
klm
qrs
# Check parameter switching in a query rewrite
SELECT * FROM test.t1 WHERE a = 'def' OR b = 'ghi';
a b
abc def
ghi klm
Warnings:
Note 1105 Query 'SELECT * FROM test.t1 WHERE a = 'def' OR b = 'ghi'' rewritten to 'SELECT * FROM test.t1 WHERE b = 'def' OR a = 'ghi'' by a query rewrite plugin
# Verify with whitespace.
SELECT * FROM test.t1 WHERE a = 'def' OR b = 'ghi';
a b
abc def
ghi klm
Warnings:
Note 1105 Query 'SELECT * FROM test.t1 WHERE a = 'def' OR b = 'ghi'' rewritten to 'SELECT * FROM test.t1 WHERE b = 'def' OR a = 'ghi'' by a query rewrite plugin
# Verify with comments.
SELECT * FROM test.t1 WHERE a =/* 'def' ? */'def' OR b = 'ghi';
a b
abc def
ghi klm
Warnings:
Note 1105 Query 'SELECT * FROM test.t1 WHERE a =/* 'def' ? */'def' OR b = 'ghi'' rewritten to 'SELECT * FROM test.t1 WHERE b = 'def' OR a = 'ghi'' by a query rewrite plugin
# Check our status variables.
SHOW STATUS LIKE 'Rewriter%';
Variable_name Value
Rewriter_number_loaded_rules 5
Rewriter_number_reloads 3
Rewriter_number_rewritten_queries 13
Rewriter_reload_error OFF
DROP TABLE t1;
DROP TABLE t2;
DELETE FROM query_rewrite.rewrite_rules;
# Test of literals matching.
INSERT INTO query_rewrite.rewrite_rules ( pattern, replacement )
VALUES ( 'SELECT 1, ?', 'SELECT "rewritten w/rule 1"' ),
( 'SELECT 2, ?', 'SELECT "rewritten w/rule 2"' ),
( 'SELECT "The_original_query"', 'SELECT "The_rewritten_query"');
SELECT * FROM query_rewrite.rewrite_rules;
id pattern pattern_database replacement enabled message
7 SELECT 1, ? NULL SELECT "rewritten w/rule 1" YES NULL
8 SELECT 2, ? NULL SELECT "rewritten w/rule 2" YES NULL
9 SELECT "The_original_query" NULL SELECT "The_rewritten_query" YES NULL
CALL query_rewrite.flush_rewrite_rules();
SELECT * FROM query_rewrite.rewrite_rules;
id pattern pattern_database replacement enabled message
7 SELECT 1, ? NULL SELECT "rewritten w/rule 1" YES NULL
8 SELECT 2, ? NULL SELECT "rewritten w/rule 2" YES NULL
9 SELECT "The_original_query" NULL SELECT "The_rewritten_query" YES NULL
SELECT 1, 1;
rewritten w/rule 1
rewritten w/rule 1
Warnings:
Note 1105 Query 'SELECT 1, 1' rewritten to 'SELECT "rewritten w/rule 1"' by a query rewrite plugin
SELECT 1, 2;
rewritten w/rule 1
rewritten w/rule 1
Warnings:
Note 1105 Query 'SELECT 1, 2' rewritten to 'SELECT "rewritten w/rule 1"' by a query rewrite plugin
SELECT 2, 1;
rewritten w/rule 2
rewritten w/rule 2
Warnings:
Note 1105 Query 'SELECT 2, 1' rewritten to 'SELECT "rewritten w/rule 2"' by a query rewrite plugin
SELECT 2, 2;
rewritten w/rule 2
rewritten w/rule 2
Warnings:
Note 1105 Query 'SELECT 2, 2' rewritten to 'SELECT "rewritten w/rule 2"' by a query rewrite plugin
SELECT 3, 1;
3 1
3 1
SELECT 3, 2;
3 2
3 2
SELECT 'The_original_query';
The_rewritten_query
The_rewritten_query
Warnings:
Note 1105 Query 'SELECT 'The_original_query'' rewritten to 'SELECT "The_rewritten_query"' 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.
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