77 lines
4.1 KiB
Plaintext
77 lines
4.1 KiB
Plaintext
#
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# Test of the case when two rewrite rule pattern have the same digest.
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#
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SET sql_mode = concat ( @@sql_mode, ',PIPES_AS_CONCAT' );
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CREATE TABLE t1 ( a VARCHAR(10) );
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# Query rewrite plugin was installed.
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# This will supposedly fill up the token buffer.
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# We have to keep entries in the error log unique, we can't clear it.
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SET @query_term = 'SELECT * FROM test.t1 WHERE a = "digest_collision.test"';
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SET @a_union_branch = ' UNION ' || @query_term;
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SET @tail1 = 'UNION SELECT 1';
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SET @tail2 = 'UNION SELECT 2';
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SELECT character_maximum_length INTO @max_pattern_length
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FROM information_schema.columns
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WHERE table_name = 'rewrite_rules'
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AND column_name = 'pattern';
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SET @no_unions_that_fit =
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floor(
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( @max_pattern_length - char_length(@query_term) - char_length(@tail1) ) /
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char_length(@a_union_branch));
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SELECT @query_term, @a_union_branch, @max_pattern_length, @no_unions_that_fit;
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@query_term @a_union_branch @max_pattern_length @no_unions_that_fit
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SELECT * FROM test.t1 WHERE a = "digest_collision.test" UNION SELECT * FROM test.t1 WHERE a = "digest_collision.test" 5000 79
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SET @pattern1 = @query_term || repeat( @a_union_branch, @no_unions_that_fit);
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SET @pattern2 = concat ( @pattern1, @tail1 );
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SET @nonmatching_query = concat ( @pattern1, @tail2 );
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INSERT INTO query_rewrite.rewrite_rules ( pattern, replacement )
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VALUES ( @pattern1, 'SELECT "Rewrite rule #1"' ),
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( @pattern2, 'SELECT "Rewrite rule #2"' );
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CALL query_rewrite.flush_rewrite_rules();
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SELECT group_concat(replacement) =
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'SELECT "Rewrite rule #1",SELECT "Rewrite rule #2"'
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AS digests_indeed_collide
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FROM query_rewrite.rewrite_rules
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GROUP BY pattern_digest;
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digests_indeed_collide
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1
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SELECT char_length(pattern) FROM query_rewrite.rewrite_rules;
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char_length(pattern)
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4953
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4967
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PREPARE pattern1_stmt FROM @pattern1;
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Warnings:
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Note 1105 Query 'SELECT * FROM test.t1 WHERE a = "digest_collision.test" UNION SELECT * FROM test.t1 WHERE a = "digest_collision.test" UNION SELECT * FROM test.t1 WHERE a = "digest_collision.test" UNION SELECT * FROM test.t1 WHERE a = "digest_collision.test" UNION SELECT * FROM test.t1 WHERE a = "digest_collision.test" UNION SELECT * FROM test.t1 WHERE a = "digest_collision.test" UNION SELECT * FROM test.t1 WHERE a = "digest_collision.test" UNION SELECT * FROM test.t1 WHERE a = "digest_collision.test" UNION SELECT *
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EXECUTE pattern1_stmt;
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Rewrite rule #1
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Rewrite rule #1
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PREPARE pattern2_stmt FROM @pattern2;
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Warnings:
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Note 1105 Query 'SELECT * FROM test.t1 WHERE a = "digest_collision.test" UNION SELECT * FROM test.t1 WHERE a = "digest_collision.test" UNION SELECT * FROM test.t1 WHERE a = "digest_collision.test" UNION SELECT * FROM test.t1 WHERE a = "digest_collision.test" UNION SELECT * FROM test.t1 WHERE a = "digest_collision.test" UNION SELECT * FROM test.t1 WHERE a = "digest_collision.test" UNION SELECT * FROM test.t1 WHERE a = "digest_collision.test" UNION SELECT * FROM test.t1 WHERE a = "digest_collision.test" UNION SELECT *
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EXECUTE pattern2_stmt;
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Rewrite rule #2
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Rewrite rule #2
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SET @@global.rewriter_verbose = 2;
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PREPARE nonmatching_stmt FROM @nonmatching_query;
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EXECUTE nonmatching_stmt;
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a
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2
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SET @@global.rewriter_verbose = DEFAULT;
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CREATE TABLE IF NOT EXISTS error_log ( line TEXT );
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DELETE FROM error_log;
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LOAD DATA LOCAL INFILE 'ERROR_LOG'
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INTO TABLE error_log FIELDS TERMINATED BY '\t';
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UPDATE error_log SET line = replace ( line, '\r', '' );
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SELECT search_error_log( '[Note]', '%Plugin Rewriter reported: ''Statement "SELECT * FROM test.t1 ' ||
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'WHERE a = "digest_collision.test"%' );
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search_error_log( '[Note]', '%Plugin Rewriter reported: ''Statement "SELECT * FROM test.t1 ' ||
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'WHERE a = "digest_collision.test"%' )
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[Note] [MY-011235] [Server] Plugin Rewriter reported: 'Statement "SELECT * FROM test.t1 WHERE a = "digest_collision.test" UNION SELECT * FROM test.t1 WHERE a = "diges..." with digest "64146a5e6ad20be25f218421210cc3adbe982f10fe76846a3888baba5042bbbd" matched some rule but had different parse tree and/or literals.'
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DROP TABLE t1;
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Warnings:
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Warning 1620 Plugin is busy and will be uninstalled on shutdown
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# Query rewrite plugin was queued for uninstalling.
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DROP TABLE error_log;
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DROP FUNCTION search_error_log;
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SET sql_mode = DEFAULT;
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