75 lines
2.3 KiB
Plaintext
75 lines
2.3 KiB
Plaintext
--echo #
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--echo # Test of the case when two rewrite rule pattern have the same digest.
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--echo #
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SET sql_mode = concat ( @@sql_mode, ',PIPES_AS_CONCAT' );
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--source suite/query_rewrite_plugins/include/have_plugin_rewriter.inc
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CREATE TABLE t1 ( a VARCHAR(10) );
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--source suite/query_rewrite_plugins/include/install_rewriter_with_optional_columns.inc
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--echo # This will supposedly fill up the token buffer.
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--echo # 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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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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SELECT char_length(pattern) FROM query_rewrite.rewrite_rules;
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PREPARE pattern1_stmt FROM @pattern1;
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EXECUTE pattern1_stmt;
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PREPARE pattern2_stmt FROM @pattern2;
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EXECUTE pattern2_stmt;
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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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SET @@global.rewriter_verbose = DEFAULT;
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--source suite/query_rewrite_plugins/include/load_error_log.inc
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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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DROP TABLE t1;
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--source suite/query_rewrite_plugins/include/uninstall_rewriter.inc
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--source suite/query_rewrite_plugins/include/drop_error_log.inc
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SET sql_mode = DEFAULT;
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