mirror of
https://github.com/MariaDB/server.git
synced 2025-11-03 14:33:32 +03:00
1760 lines
69 KiB
Plaintext
1760 lines
69 KiB
Plaintext
drop table if exists t1,t2;
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set @save_use_stat_tables=@@use_stat_tables;
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DELETE FROM mysql.table_stats;
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DELETE FROM mysql.column_stats;
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DELETE FROM mysql.index_stats;
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set use_stat_tables='preferably';
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CREATE TABLE t1 (
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a int NOT NULL PRIMARY KEY,
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b varchar(32),
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c char(16),
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d date,
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e double,
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f bit(3),
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INDEX idx1 (b, e),
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INDEX idx2 (c, d),
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INDEX idx3 (d),
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INDEX idx4 (e, b, d)
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) ENGINE= MYISAM;
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INSERT INTO t1 VALUES
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(0, NULL, NULL, NULL, NULL, NULL),
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(7, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'dddddddd', '1990-05-15', 0.1, b'100'),
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(17, 'vvvvvvvvvvvvv', 'aaaa', '1989-03-12', 0.01, b'101'),
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(1, 'vvvvvvvvvvvvv', NULL, '1989-03-12', 0.01, b'100'),
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(12, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'dddddddd', '1999-07-23', 0.112, b'001'),
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(23, 'vvvvvvvvvvvvv', 'dddddddd', '1999-07-23', 0.1, b'100'),
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(8, 'vvvvvvvvvvvvv', 'aaaa', '1999-07-23', 0.1, b'100'),
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(22, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'aaaa', '1989-03-12', 0.112, b'001'),
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(31, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'aaaa', '1999-07-23', 0.01, b'001'),
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(10, NULL, 'aaaa', NULL, 0.01, b'010'),
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(5, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'dddddddd', '1999-07-23', 0.1, b'100'),
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(15, 'vvvvvvvvvvvvv', 'ccccccccc', '1990-05-15', 0.1, b'010'),
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(30, NULL, 'bbbbbb', NULL, NULL, b'100'),
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(38, 'zzzzzzzzzzzzzzzzzz', 'bbbbbb', NULL, NULL, NULL),
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(18, 'zzzzzzzzzzzzzzzzzz', 'ccccccccc', '1990-05-15', 0.01, b'010'),
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(9, 'yyy', 'bbbbbb', '1998-08-28', 0.01, NULL),
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(29, 'vvvvvvvvvvvvv', 'dddddddd', '1999-07-23', 0.012, b'010'),
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(3, 'yyy', 'dddddddd', '1990-05-15', 0.112, b'010'),
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(39, 'zzzzzzzzzzzzzzzzzz', 'bbbbbb', NULL, 0.01, b'100'),
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(14, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'ccccccccc', '1990-05-15', 0.1, b'100'),
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(40, 'zzzzzzzzzzzzzzzzzz', 'bbbbbb', '1989-03-12', NULL, NULL),
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(44, NULL, 'aaaa', '1989-03-12', NULL, b'010'),
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(19, 'vvvvvvvvvvvvv', 'ccccccccc', '1990-05-15', 0.012, b'011'),
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(21, 'zzzzzzzzzzzzzzzzzz', 'dddddddd', '1989-03-12', 0.112, b'100'),
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(45, NULL, NULL, '1989-03-12', NULL, b'011'),
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(2, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'ccccccccc', '1990-05-15', 0.1, b'001'),
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(35, 'yyy', 'aaaa', '1990-05-15', 0.05, b'011'),
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(4, 'vvvvvvvvvvvvv', 'dddddddd', '1999-07-23', 0.01, b'101'),
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(47, NULL, 'aaaa', '1990-05-15', 0.05, b'010'),
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(42, NULL, 'ccccccccc', '1989-03-12', 0.01, b'010'),
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(32, NULL, 'bbbbbb', '1990-05-15', 0.01, b'011'),
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(49, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww' , 'aaaa', '1990-05-15', NULL, NULL),
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(43, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww' , 'bbbbbb', '1990-05-15', NULL, b'100'),
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(37, 'yyy', NULL, '1989-03-12', 0.05, b'011'),
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(41, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'ccccccccc', '1990-05-15', 0.05, NULL),
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(34, 'yyy', NULL, NULL, NULL, NULL),
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(33, 'zzzzzzzzzzzzzzzzzz', 'dddddddd', '1989-03-12', 0.05, b'011'),
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(24, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'dddddddd', '1990-05-15', 0.01, b'101'),
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(11, 'yyy', 'ccccccccc', '1999-07-23', 0.1, NULL),
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(25, 'zzzzzzzzzzzzzzzzzz', 'bbb', '1989-03-12', 0.01, b'101');
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ANALYZE TABLE t1;
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Table Op Msg_type Msg_text
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test.t1 analyze status Engine-independent statistics collected
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test.t1 analyze status OK
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SELECT * FROM mysql.table_stats;
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db_name table_name cardinality
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test t1 40
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SELECT * FROM mysql.column_stats;
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db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
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test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
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test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
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test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
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test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
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test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
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test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
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SELECT * FROM mysql.index_stats;
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db_name table_name index_name prefix_arity avg_frequency
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test t1 PRIMARY 1 1.0000
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test t1 idx1 1 6.4000
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test t1 idx1 2 1.6875
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test t1 idx2 1 7.0000
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test t1 idx2 2 2.3846
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test t1 idx3 1 8.5000
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test t1 idx4 1 6.2000
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test t1 idx4 2 1.6875
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test t1 idx4 3 1.1304
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SELECT COUNT(*) FROM t1;
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COUNT(*)
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40
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SELECT * FROM mysql.column_stats
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WHERE db_name='test' AND table_name='t1' AND column_name='a';
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db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
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test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
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SELECT MIN(t1.a), MAX(t1.a),
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(SELECT COUNT(*) FROM t1 WHERE t1.b IS NULL) /
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(SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.a)",
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(SELECT COUNT(t1.a) FROM t1) /
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(SELECT COUNT(DISTINCT t1.a) FROM t1) AS "AVG_FREQUENCY(t1.a)"
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FROM t1;
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MIN(t1.a) MAX(t1.a) NULLS_RATIO(t1.a) AVG_FREQUENCY(t1.a)
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0 49 0.2000 1.0000
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SELECT * FROM mysql.column_stats
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WHERE db_name='test' AND table_name='t1' AND column_name='b';
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db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
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test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
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SELECT MIN(t1.b), MAX(t1.b),
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(SELECT COUNT(*) FROM t1 WHERE t1.b IS NULL) /
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(SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.b)",
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(SELECT COUNT(t1.b) FROM t1) /
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(SELECT COUNT(DISTINCT t1.b) FROM t1) AS "AVG_FREQUENCY(t1.b)"
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FROM t1;
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MIN(t1.b) MAX(t1.b) NULLS_RATIO(t1.b) AVG_FREQUENCY(t1.b)
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vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 6.4000
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SELECT * FROM mysql.column_stats
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WHERE db_name='test' AND table_name='t1' AND column_name='c';
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db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
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test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
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SELECT MIN(t1.c), MAX(t1.c),
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(SELECT COUNT(*) FROM t1 WHERE t1.c IS NULL) /
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(SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.c)",
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(SELECT COUNT(t1.c) FROM t1) /
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(SELECT COUNT(DISTINCT t1.c) FROM t1) AS "AVG_FREQUENCY(t1.c)"
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FROM t1;
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MIN(t1.c) MAX(t1.c) NULLS_RATIO(t1.c) AVG_FREQUENCY(t1.c)
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aaaa dddddddd 0.1250 7.0000
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SELECT * FROM mysql.column_stats
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WHERE db_name='test' AND table_name='t1' AND column_name='d';
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db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
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test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
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SELECT MIN(t1.d), MAX(t1.d),
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(SELECT COUNT(*) FROM t1 WHERE t1.d IS NULL) /
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(SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.d)",
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(SELECT COUNT(t1.d) FROM t1) /
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(SELECT COUNT(DISTINCT t1.d) FROM t1) AS "AVG_FREQUENCY(t1.d)"
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FROM t1;
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MIN(t1.d) MAX(t1.d) NULLS_RATIO(t1.d) AVG_FREQUENCY(t1.d)
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1989-03-12 1999-07-23 0.1500 8.5000
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SELECT * FROM mysql.column_stats
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WHERE db_name='test' AND table_name='t1' AND column_name='e';
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db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
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test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
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SELECT MIN(t1.e), MAX(t1.e),
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(SELECT COUNT(*) FROM t1 WHERE t1.e IS NULL) /
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(SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.e)",
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(SELECT COUNT(t1.e) FROM t1) /
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(SELECT COUNT(DISTINCT t1.e) FROM t1) AS "AVG_FREQUENCY(t1.e)"
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FROM t1;
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MIN(t1.e) MAX(t1.e) NULLS_RATIO(t1.e) AVG_FREQUENCY(t1.e)
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0.01 0.112 0.2250 6.2000
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SELECT * FROM mysql.index_stats
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WHERE db_name='test' AND table_name='t1' AND index_name='idx1';
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db_name table_name index_name prefix_arity avg_frequency
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test t1 idx1 1 6.4000
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test t1 idx1 2 1.6875
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SELECT
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(SELECT COUNT(*) FROM t1 WHERE t1.b IS NOT NULL) /
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(SELECT COUNT(DISTINCT t1.b) FROM t1 WHERE t1.b IS NOT NULL)
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AS 'ARITY 1',
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(SELECT COUNT(*) FROM t1 WHERE t1.b IS NOT NULL AND t1.e IS NOT NULL) /
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(SELECT COUNT(DISTINCT t1.b, t1.e) FROM t1
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WHERE t1.b IS NOT NULL AND t1.e IS NOT NULL)
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AS 'ARITY 2';
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ARITY 1 ARITY 2
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6.4000 1.6875
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SELECT * FROM mysql.index_stats
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WHERE db_name='test' AND table_name='t1' AND index_name='idx2';
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db_name table_name index_name prefix_arity avg_frequency
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test t1 idx2 1 7.0000
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test t1 idx2 2 2.3846
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SELECT
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(SELECT COUNT(*) FROM t1 WHERE t1.c IS NOT NULL) /
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(SELECT COUNT(DISTINCT t1.c) FROM t1 WHERE t1.c IS NOT NULL)
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AS 'ARITY 1',
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(SELECT COUNT(*) FROM t1 WHERE t1.c IS NOT NULL AND t1.d IS NOT NULL) /
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(SELECT COUNT(DISTINCT t1.c, t1.d) FROM t1
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WHERE t1.c IS NOT NULL AND t1.d IS NOT NULL)
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AS 'ARITY 2';
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ARITY 1 ARITY 2
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7.0000 2.3846
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SELECT * FROM mysql.index_stats
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WHERE db_name='test' AND table_name='t1' AND index_name='idx3';
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db_name table_name index_name prefix_arity avg_frequency
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test t1 idx3 1 8.5000
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SELECT
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(SELECT COUNT(*) FROM t1 WHERE t1.d IS NOT NULL) /
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(SELECT COUNT(DISTINCT t1.d) FROM t1 WHERE t1.d IS NOT NULL)
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AS 'ARITY 1';
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ARITY 1
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8.5000
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SELECT * FROM mysql.index_stats
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WHERE db_name='test' AND table_name='t1' AND index_name='idx4';
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db_name table_name index_name prefix_arity avg_frequency
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test t1 idx4 1 6.2000
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test t1 idx4 2 1.6875
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test t1 idx4 3 1.1304
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SELECT
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(SELECT COUNT(*) FROM t1 WHERE t1.e IS NOT NULL) /
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(SELECT COUNT(DISTINCT t1.e) FROM t1 WHERE t1.e IS NOT NULL)
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AS 'ARITY 1',
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(SELECT COUNT(*) FROM t1 WHERE t1.e IS NOT NULL AND t1.b IS NOT NULL) /
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(SELECT COUNT(DISTINCT t1.e, t1.b) FROM t1
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WHERE t1.e IS NOT NULL AND t1.b IS NOT NULL)
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AS 'ARITY 2',
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(SELECT COUNT(*) FROM t1
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WHERE t1.e IS NOT NULL AND t1.b IS NOT NULL AND t1.d IS NOT NULL) /
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(SELECT COUNT(DISTINCT t1.e, t1.b, t1.d) FROM t1
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WHERE t1.e IS NOT NULL AND t1.b IS NOT NULL AND t1.d IS NOT NULL)
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AS 'ARITY 3';
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ARITY 1 ARITY 2 ARITY 3
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6.2000 1.6875 1.1304
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DELETE FROM mysql.column_stats;
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set histogram_size=4;
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ANALYZE TABLE t1;
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Table Op Msg_type Msg_text
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test.t1 analyze status Engine-independent statistics collected
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test.t1 analyze status Table is already up to date
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SELECT db_name, table_name, column_name,
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min_value, max_value,
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nulls_ratio, avg_frequency,
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hist_size, hist_type, HEX(histogram)
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FROM mysql.column_stats;
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db_name table_name column_name min_value max_value nulls_ratio avg_frequency hist_size hist_type HEX(histogram)
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test t1 a 0 49 0.0000 1.0000 4 SINGLE_PREC_HB 2E62A1D0
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test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 6.4000 4 SINGLE_PREC_HB 003FBFFF
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test t1 c aaaa dddddddd 0.1250 7.0000 4 SINGLE_PREC_HB 0055AAFF
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test t1 d 1989-03-12 1999-07-23 0.1500 8.5000 4 SINGLE_PREC_HB 001919FF
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test t1 e 0.01 0.112 0.2250 6.2000 4 SINGLE_PREC_HB 000564E1
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test t1 f 1 5 0.2000 6.4000 4 SINGLE_PREC_HB 3F7FBFBF
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DELETE FROM mysql.column_stats;
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set histogram_size=8;
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set histogram_type='DOUBLE_PREC_HB';
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ANALYZE TABLE t1;
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Table Op Msg_type Msg_text
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test.t1 analyze status Engine-independent statistics collected
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test.t1 analyze status Table is already up to date
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SELECT db_name, table_name, column_name,
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min_value, max_value,
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nulls_ratio, avg_frequency,
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hist_size, hist_type, HEX(histogram)
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FROM mysql.column_stats;
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db_name table_name column_name min_value max_value nulls_ratio avg_frequency hist_size hist_type HEX(histogram)
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test t1 a 0 49 0.0000 1.0000 8 DOUBLE_PREC_HB 052F4363F4A1F9D0
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test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 6.4000 8 DOUBLE_PREC_HB 0000FF3FFFBFFFFF
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test t1 c aaaa dddddddd 0.1250 7.0000 8 DOUBLE_PREC_HB 00005555AAAAFFFF
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test t1 d 1989-03-12 1999-07-23 0.1500 8.5000 8 DOUBLE_PREC_HB 0000031A031AFFFF
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test t1 e 0.01 0.112 0.2250 6.2000 8 DOUBLE_PREC_HB 000005056464E1E1
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test t1 f 1 5 0.2000 6.4000 8 DOUBLE_PREC_HB FF3FFF7FFFBFFFBF
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DELETE FROM mysql.column_stats;
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set histogram_size= 0;
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set histogram_type=default;
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ANALYZE TABLE t1;
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Table Op Msg_type Msg_text
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test.t1 analyze status Engine-independent statistics collected
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test.t1 analyze status Table is already up to date
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CREATE TABLE t3 (
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a int NOT NULL PRIMARY KEY,
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b varchar(32),
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c char(16),
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INDEX idx (c)
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) ENGINE=MYISAM;
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INSERT INTO t3 VALUES
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(0, NULL, NULL),
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(7, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'dddddddd'),
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(17, 'vvvvvvvvvvvvv', 'aaaa'),
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(1, 'vvvvvvvvvvvvv', NULL),
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(12, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'dddddddd'),
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(23, 'vvvvvvvvvvvvv', 'dddddddd'),
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(8, 'vvvvvvvvvvvvv', 'aaaa'),
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(22, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'aaaa'),
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(31, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'aaaa'),
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(10, NULL, 'aaaa'),
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(5, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'dddddddd'),
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(15, 'vvvvvvvvvvvvv', 'ccccccccc'),
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(30, NULL, 'bbbbbb'),
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(38, 'zzzzzzzzzzzzzzzzzz', 'bbbbbb'),
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(18, 'zzzzzzzzzzzzzzzzzz', 'ccccccccc'),
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(9, 'yyy', 'bbbbbb'),
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(29, 'vvvvvvvvvvvvv', 'dddddddd');
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ANALYZE TABLE t3;
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Table Op Msg_type Msg_text
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test.t3 analyze status Engine-independent statistics collected
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test.t3 analyze status OK
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SELECT * FROM mysql.table_stats;
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db_name table_name cardinality
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test t1 40
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test t3 17
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SELECT * FROM mysql.column_stats;
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db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
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test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
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test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
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test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
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test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
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test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
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test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
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test t3 a 0 38 0.0000 4.0000 1.0000 0 NULL NULL
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test t3 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.1765 18.0714 2.8000 0 NULL NULL
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test t3 c aaaa dddddddd 0.1176 6.4000 3.7500 0 NULL NULL
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SELECT * FROM mysql.index_stats;
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db_name table_name index_name prefix_arity avg_frequency
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test t1 PRIMARY 1 1.0000
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test t1 idx1 1 6.4000
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test t1 idx1 2 1.6875
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test t1 idx2 1 7.0000
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test t1 idx2 2 2.3846
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test t1 idx3 1 8.5000
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test t1 idx4 1 6.2000
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test t1 idx4 2 1.6875
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test t1 idx4 3 1.1304
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test t3 PRIMARY 1 1.0000
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test t3 idx 1 3.7500
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ALTER TABLE t1 RENAME TO s1;
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SELECT * FROM mysql.table_stats;
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db_name table_name cardinality
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test s1 40
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test t3 17
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SELECT * FROM mysql.column_stats;
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db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
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test s1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
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test s1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
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test s1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
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test s1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
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test s1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
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test s1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
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test t3 a 0 38 0.0000 4.0000 1.0000 0 NULL NULL
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test t3 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.1765 18.0714 2.8000 0 NULL NULL
|
|
test t3 c aaaa dddddddd 0.1176 6.4000 3.7500 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test s1 PRIMARY 1 1.0000
|
|
test s1 idx1 1 6.4000
|
|
test s1 idx1 2 1.6875
|
|
test s1 idx2 1 7.0000
|
|
test s1 idx2 2 2.3846
|
|
test s1 idx3 1 8.5000
|
|
test s1 idx4 1 6.2000
|
|
test s1 idx4 2 1.6875
|
|
test s1 idx4 3 1.1304
|
|
test t3 PRIMARY 1 1.0000
|
|
test t3 idx 1 3.7500
|
|
RENAME TABLE s1 TO t1;
|
|
SELECT * FROM mysql.table_stats;
|
|
db_name table_name cardinality
|
|
test t1 40
|
|
test t3 17
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
test t3 a 0 38 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t3 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.1765 18.0714 2.8000 0 NULL NULL
|
|
test t3 c aaaa dddddddd 0.1176 6.4000 3.7500 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx1 1 6.4000
|
|
test t1 idx1 2 1.6875
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx3 1 8.5000
|
|
test t1 idx4 1 6.2000
|
|
test t1 idx4 2 1.6875
|
|
test t1 idx4 3 1.1304
|
|
test t3 PRIMARY 1 1.0000
|
|
test t3 idx 1 3.7500
|
|
DROP TABLE t3;
|
|
SELECT * FROM mysql.table_stats;
|
|
db_name table_name cardinality
|
|
test t1 40
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx1 1 6.4000
|
|
test t1 idx1 2 1.6875
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx3 1 8.5000
|
|
test t1 idx4 1 6.2000
|
|
test t1 idx4 2 1.6875
|
|
test t1 idx4 3 1.1304
|
|
CREATE TEMPORARY TABLE t0 (
|
|
a int NOT NULL PRIMARY KEY,
|
|
b varchar(32)
|
|
);
|
|
INSERT INTO t0 SELECT a,b FROM t1;
|
|
ALTER TABLE t1 CHANGE COLUMN b x varchar(32),
|
|
CHANGE COLUMN e y double;
|
|
SHOW CREATE TABLE t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`x` varchar(32) DEFAULT NULL,
|
|
`c` char(16) DEFAULT NULL,
|
|
`d` date DEFAULT NULL,
|
|
`y` double DEFAULT NULL,
|
|
`f` bit(3) DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
KEY `idx1` (`x`,`y`),
|
|
KEY `idx2` (`c`,`d`),
|
|
KEY `idx3` (`d`),
|
|
KEY `idx4` (`y`,`x`,`d`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
test t1 x vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
|
|
test t1 y 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
ALTER TABLE t1 CHANGE COLUMN x b varchar(32),
|
|
CHANGE COLUMN y e double;
|
|
SHOW CREATE TABLE t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`b` varchar(32) DEFAULT NULL,
|
|
`c` char(16) DEFAULT NULL,
|
|
`d` date DEFAULT NULL,
|
|
`e` double DEFAULT NULL,
|
|
`f` bit(3) DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
KEY `idx1` (`b`,`e`),
|
|
KEY `idx2` (`c`,`d`),
|
|
KEY `idx3` (`d`),
|
|
KEY `idx4` (`e`,`b`,`d`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
ALTER TABLE t1 RENAME TO s1, CHANGE COLUMN b x varchar(32);
|
|
SHOW CREATE TABLE s1;
|
|
Table Create Table
|
|
s1 CREATE TABLE `s1` (
|
|
`a` int(11) NOT NULL,
|
|
`x` varchar(32) DEFAULT NULL,
|
|
`c` char(16) DEFAULT NULL,
|
|
`d` date DEFAULT NULL,
|
|
`e` double DEFAULT NULL,
|
|
`f` bit(3) DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
KEY `idx1` (`x`,`e`),
|
|
KEY `idx2` (`c`,`d`),
|
|
KEY `idx3` (`d`),
|
|
KEY `idx4` (`e`,`x`,`d`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
SELECT * FROM mysql.table_stats;
|
|
db_name table_name cardinality
|
|
test s1 40
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test s1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test s1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test s1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test s1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test s1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
test s1 x vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test s1 PRIMARY 1 1.0000
|
|
test s1 idx1 1 6.4000
|
|
test s1 idx1 2 1.6875
|
|
test s1 idx2 1 7.0000
|
|
test s1 idx2 2 2.3846
|
|
test s1 idx3 1 8.5000
|
|
test s1 idx4 1 6.2000
|
|
test s1 idx4 2 1.6875
|
|
test s1 idx4 3 1.1304
|
|
ALTER TABLE s1 RENAME TO t1, CHANGE COLUMN x b varchar(32);
|
|
SHOW CREATE TABLE t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`b` varchar(32) DEFAULT NULL,
|
|
`c` char(16) DEFAULT NULL,
|
|
`d` date DEFAULT NULL,
|
|
`e` double DEFAULT NULL,
|
|
`f` bit(3) DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
KEY `idx1` (`b`,`e`),
|
|
KEY `idx2` (`c`,`d`),
|
|
KEY `idx3` (`d`),
|
|
KEY `idx4` (`e`,`b`,`d`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
SELECT * FROM mysql.table_stats;
|
|
db_name table_name cardinality
|
|
test t1 40
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx1 1 6.4000
|
|
test t1 idx1 2 1.6875
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx3 1 8.5000
|
|
test t1 idx4 1 6.2000
|
|
test t1 idx4 2 1.6875
|
|
test t1 idx4 3 1.1304
|
|
ALTER TABLE t1 CHANGE COLUMN b x varchar(30);
|
|
SHOW CREATE TABLE t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`x` varchar(30) DEFAULT NULL,
|
|
`c` char(16) DEFAULT NULL,
|
|
`d` date DEFAULT NULL,
|
|
`e` double DEFAULT NULL,
|
|
`f` bit(3) DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
KEY `idx1` (`x`,`e`),
|
|
KEY `idx2` (`c`,`d`),
|
|
KEY `idx3` (`d`),
|
|
KEY `idx4` (`e`,`x`,`d`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx3 1 8.5000
|
|
ALTER TABLE t1 CHANGE COLUMN x b varchar(32);
|
|
SHOW CREATE TABLE t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`b` varchar(32) DEFAULT NULL,
|
|
`c` char(16) DEFAULT NULL,
|
|
`d` date DEFAULT NULL,
|
|
`e` double DEFAULT NULL,
|
|
`f` bit(3) DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
KEY `idx1` (`b`,`e`),
|
|
KEY `idx2` (`c`,`d`),
|
|
KEY `idx3` (`d`),
|
|
KEY `idx4` (`e`,`b`,`d`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx3 1 8.5000
|
|
ANALYZE TABLE t1 PERSISTENT FOR COLUMNS(b) INDEXES(idx1, idx4);
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status OK
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx1 1 6.4000
|
|
test t1 idx1 2 1.6875
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx3 1 8.5000
|
|
test t1 idx4 1 6.2000
|
|
test t1 idx4 2 1.6875
|
|
test t1 idx4 3 1.1304
|
|
SELECT * INTO OUTFILE 'MYSQLTEST_VARDIR/tmp/save_column_stats'
|
|
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\n'
|
|
FROM mysql.column_stats WHERE column_name='b';
|
|
SELECT * INTO OUTFILE 'MYSQLTEST_VARDIR/tmp/save_index_stats'
|
|
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\n'
|
|
FROM mysql.index_stats WHERE index_name IN ('idx1', 'idx4');
|
|
ALTER TABLE t1 CHANGE COLUMN b x varchar(30);
|
|
SHOW CREATE TABLE t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`x` varchar(30) DEFAULT NULL,
|
|
`c` char(16) DEFAULT NULL,
|
|
`d` date DEFAULT NULL,
|
|
`e` double DEFAULT NULL,
|
|
`f` bit(3) DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
KEY `idx1` (`x`,`e`),
|
|
KEY `idx2` (`c`,`d`),
|
|
KEY `idx3` (`d`),
|
|
KEY `idx4` (`e`,`x`,`d`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx3 1 8.5000
|
|
ALTER TABLE t1 CHANGE COLUMN x b varchar(32);
|
|
SHOW CREATE TABLE t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`b` varchar(32) DEFAULT NULL,
|
|
`c` char(16) DEFAULT NULL,
|
|
`d` date DEFAULT NULL,
|
|
`e` double DEFAULT NULL,
|
|
`f` bit(3) DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
KEY `idx1` (`b`,`e`),
|
|
KEY `idx2` (`c`,`d`),
|
|
KEY `idx3` (`d`),
|
|
KEY `idx4` (`e`,`b`,`d`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx3 1 8.5000
|
|
LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/save_column_stats'
|
|
INTO TABLE mysql.column_stats
|
|
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\n';
|
|
LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/save_index_stats'
|
|
INTO TABLE mysql.index_stats
|
|
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\n';
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx1 1 6.4000
|
|
test t1 idx1 2 1.6875
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx3 1 8.5000
|
|
test t1 idx4 1 6.2000
|
|
test t1 idx4 2 1.6875
|
|
test t1 idx4 3 1.1304
|
|
ALTER TABLE t1 DROP COLUMN b;
|
|
SHOW CREATE TABLE t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`c` char(16) DEFAULT NULL,
|
|
`d` date DEFAULT NULL,
|
|
`e` double DEFAULT NULL,
|
|
`f` bit(3) DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
KEY `idx1` (`e`),
|
|
KEY `idx2` (`c`,`d`),
|
|
KEY `idx3` (`d`),
|
|
KEY `idx4` (`e`,`d`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx3 1 8.5000
|
|
DROP INDEX idx2 ON t1;
|
|
SHOW CREATE TABLE t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`c` char(16) DEFAULT NULL,
|
|
`d` date DEFAULT NULL,
|
|
`e` double DEFAULT NULL,
|
|
`f` bit(3) DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
KEY `idx1` (`e`),
|
|
KEY `idx3` (`d`),
|
|
KEY `idx4` (`e`,`d`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx3 1 8.5000
|
|
DROP INDEX idx1 ON t1;
|
|
DROP INDEX idx4 ON t1;
|
|
SHOW CREATE TABLE t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`c` char(16) DEFAULT NULL,
|
|
`d` date DEFAULT NULL,
|
|
`e` double DEFAULT NULL,
|
|
`f` bit(3) DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
KEY `idx3` (`d`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
ALTER TABLE t1 ADD COLUMN b varchar(32);
|
|
CREATE INDEX idx1 ON t1(b, e);
|
|
CREATE INDEX idx2 ON t1(c, d);
|
|
CREATE INDEX idx4 ON t1(e, b, d);
|
|
SHOW CREATE TABLE t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`c` char(16) DEFAULT NULL,
|
|
`d` date DEFAULT NULL,
|
|
`e` double DEFAULT NULL,
|
|
`f` bit(3) DEFAULT NULL,
|
|
`b` varchar(32) DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
KEY `idx3` (`d`),
|
|
KEY `idx1` (`b`,`e`),
|
|
KEY `idx2` (`c`,`d`),
|
|
KEY `idx4` (`e`,`b`,`d`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx3 1 8.5000
|
|
ANALYZE TABLE t1 PERSISTENT FOR COLUMNS(b) INDEXES(idx1, idx2, idx4);
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status OK
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 b NULL NULL 1.0000 NULL NULL 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx1 1 NULL
|
|
test t1 idx1 2 NULL
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx3 1 8.5000
|
|
test t1 idx4 1 6.2000
|
|
test t1 idx4 2 NULL
|
|
test t1 idx4 3 NULL
|
|
UPDATE t1 SET b=(SELECT b FROM t0 WHERE t0.a= t1.a);
|
|
ANALYZE TABLE t1 PERSISTENT FOR COLUMNS(b) INDEXES(idx1, idx2, idx4);
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status OK
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx1 1 6.4000
|
|
test t1 idx1 2 1.6875
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx3 1 8.5000
|
|
test t1 idx4 1 6.2000
|
|
test t1 idx4 2 1.6875
|
|
test t1 idx4 3 1.1304
|
|
ALTER TABLE t1 DROP COLUMN b,
|
|
DROP INDEX idx1, DROP INDEX idx2, DROP INDEX idx4;
|
|
SHOW CREATE TABLE t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`c` char(16) DEFAULT NULL,
|
|
`d` date DEFAULT NULL,
|
|
`e` double DEFAULT NULL,
|
|
`f` bit(3) DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
KEY `idx3` (`d`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx3 1 8.5000
|
|
ALTER TABLE t1 ADD COLUMN b varchar(32);
|
|
ALTER TABLE t1
|
|
ADD INDEX idx1 (b, e), ADD INDEX idx2 (c, d), ADD INDEX idx4 (e, b, d);
|
|
UPDATE t1 SET b=(SELECT b FROM t0 WHERE t0.a= t1.a);
|
|
SHOW CREATE TABLE t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`c` char(16) DEFAULT NULL,
|
|
`d` date DEFAULT NULL,
|
|
`e` double DEFAULT NULL,
|
|
`f` bit(3) DEFAULT NULL,
|
|
`b` varchar(32) DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
KEY `idx3` (`d`),
|
|
KEY `idx1` (`b`,`e`),
|
|
KEY `idx2` (`c`,`d`),
|
|
KEY `idx4` (`e`,`b`,`d`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx3 1 8.5000
|
|
ANALYZE TABLE t1 PERSISTENT FOR COLUMNS(b) INDEXES(idx1, idx2, idx4);
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status OK
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx1 1 6.4000
|
|
test t1 idx1 2 1.6875
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx3 1 8.5000
|
|
test t1 idx4 1 6.2000
|
|
test t1 idx4 2 1.6875
|
|
test t1 idx4 3 1.1304
|
|
DELETE FROM mysql.table_stats;
|
|
DELETE FROM mysql.column_stats;
|
|
DELETE FROM mysql.index_stats;
|
|
ANALYZE TABLE t1 PERSISTENT FOR COLUMNS() INDEXES();
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status Table is already up to date
|
|
SELECT * FROM mysql.table_stats;
|
|
db_name table_name cardinality
|
|
test t1 40
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
ANALYZE TABLE t1 PERSISTENT FOR COLUMNS(c,e,b) INDEXES(idx2,idx4);
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status Table is already up to date
|
|
SELECT * FROM mysql.table_stats;
|
|
db_name table_name cardinality
|
|
test t1 40
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx4 1 6.2000
|
|
test t1 idx4 2 1.6875
|
|
test t1 idx4 3 1.1304
|
|
DELETE FROM mysql.index_stats WHERE table_name='t1' AND index_name='primary';
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx4 1 6.2000
|
|
test t1 idx4 2 1.6875
|
|
test t1 idx4 3 1.1304
|
|
ANALYZE TABLE t1 PERSISTENT FOR COLUMNS() INDEXES(primary);
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status Table is already up to date
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx4 1 6.2000
|
|
test t1 idx4 2 1.6875
|
|
test t1 idx4 3 1.1304
|
|
DELETE FROM mysql.table_stats;
|
|
DELETE FROM mysql.column_stats;
|
|
DELETE FROM mysql.index_stats;
|
|
ANALYZE TABLE t1 PERSISTENT FOR COLUMNS ALL INDEXES ALL;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status Table is already up to date
|
|
SELECT * FROM mysql.table_stats;
|
|
db_name table_name cardinality
|
|
test t1 40
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx1 1 6.4000
|
|
test t1 idx1 2 1.6875
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx3 1 8.5000
|
|
test t1 idx4 1 6.2000
|
|
test t1 idx4 2 1.6875
|
|
test t1 idx4 3 1.1304
|
|
CREATE TABLE t2 LIKE t1;
|
|
ALTER TABLE t2 ENGINE=InnoDB;
|
|
INSERT INTO t2 SELECT * FROM t1;
|
|
set optimizer_switch='extended_keys=off';
|
|
ANALYZE TABLE t2;
|
|
Table Op Msg_type Msg_text
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status OK
|
|
SELECT * FROM mysql.table_stats;
|
|
db_name table_name cardinality
|
|
test t1 40
|
|
test t2 40
|
|
SELECT * FROM mysql.column_stats ORDER BY column_name, table_name;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t2 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
|
|
test t2 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t2 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t2 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t2 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
test t2 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats ORDER BY index_name, prefix_arity, table_name;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t2 PRIMARY 1 1.0000
|
|
test t1 idx1 1 6.4000
|
|
test t2 idx1 1 6.4000
|
|
test t1 idx1 2 1.6875
|
|
test t2 idx1 2 1.6875
|
|
test t1 idx2 1 7.0000
|
|
test t2 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t2 idx2 2 2.3846
|
|
test t1 idx3 1 8.5000
|
|
test t2 idx3 1 8.5000
|
|
test t1 idx4 1 6.2000
|
|
test t2 idx4 1 6.2000
|
|
test t1 idx4 2 1.6875
|
|
test t2 idx4 2 1.6875
|
|
test t1 idx4 3 1.1304
|
|
test t2 idx4 3 1.1304
|
|
DELETE FROM mysql.table_stats;
|
|
DELETE FROM mysql.column_stats;
|
|
DELETE FROM mysql.index_stats;
|
|
set optimizer_switch='extended_keys=on';
|
|
ANALYZE TABLE t2;
|
|
Table Op Msg_type Msg_text
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status OK
|
|
SELECT * FROM mysql.table_stats;
|
|
db_name table_name cardinality
|
|
test t2 40
|
|
SELECT * FROM mysql.column_stats ORDER BY column_name;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t2 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t2 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000 0 NULL NULL
|
|
test t2 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t2 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t2 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t2 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats ORDER BY index_name, prefix_arity, table_name;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t2 PRIMARY 1 1.0000
|
|
test t2 idx1 1 6.4000
|
|
test t2 idx1 2 1.6875
|
|
test t2 idx1 3 1.0000
|
|
test t2 idx2 1 7.0000
|
|
test t2 idx2 2 2.3846
|
|
test t2 idx2 3 1.0000
|
|
test t2 idx3 1 8.5000
|
|
test t2 idx3 2 1.0000
|
|
test t2 idx4 1 6.2000
|
|
test t2 idx4 2 1.6875
|
|
test t2 idx4 3 1.1304
|
|
test t2 idx4 4 1.0000
|
|
ALTER TABLE t2 DROP PRIMARY KEY, DROP INDEX idx1;
|
|
SELECT * FROM mysql.index_stats ORDER BY index_name, prefix_arity, table_name;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t2 idx2 1 7.0000
|
|
test t2 idx2 2 2.3846
|
|
test t2 idx3 1 8.5000
|
|
test t2 idx4 1 6.2000
|
|
test t2 idx4 2 1.6875
|
|
test t2 idx4 3 1.1304
|
|
UPDATE t2 SET b=0 WHERE b IS NULL;
|
|
ALTER TABLE t2 ADD PRIMARY KEY (a,b);
|
|
SELECT * FROM mysql.index_stats ORDER BY index_name, prefix_arity, table_name;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t2 idx2 1 7.0000
|
|
test t2 idx2 2 2.3846
|
|
test t2 idx3 1 8.5000
|
|
test t2 idx4 1 6.2000
|
|
test t2 idx4 2 1.6875
|
|
test t2 idx4 3 1.1304
|
|
ANALYZE TABLE t2 PERSISTENT FOR COLUMNS() INDEXES ALL;
|
|
Table Op Msg_type Msg_text
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status OK
|
|
SELECT * FROM mysql.index_stats ORDER BY index_name, prefix_arity, table_name;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t2 PRIMARY 1 1.0000
|
|
test t2 PRIMARY 2 1.0000
|
|
test t2 idx2 1 7.0000
|
|
test t2 idx2 2 2.3846
|
|
test t2 idx2 3 1.0000
|
|
test t2 idx2 4 1.0000
|
|
test t2 idx3 1 8.5000
|
|
test t2 idx3 2 1.0000
|
|
test t2 idx3 3 1.0000
|
|
test t2 idx4 1 6.2000
|
|
test t2 idx4 2 1.7222
|
|
test t2 idx4 3 1.1154
|
|
test t2 idx4 4 1.0000
|
|
ALTER TABLE t2 CHANGE COLUMN b b varchar(30);
|
|
SELECT * FROM mysql.index_stats ORDER BY index_name, prefix_arity, table_name;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t2 idx2 1 7.0000
|
|
test t2 idx2 2 2.3846
|
|
test t2 idx3 1 8.5000
|
|
ANALYZE TABLE t2 PERSISTENT FOR COLUMNS ALL INDEXES ALL;
|
|
Table Op Msg_type Msg_text
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status OK
|
|
SELECT * FROM mysql.index_stats ORDER BY index_name, prefix_arity, table_name;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t2 PRIMARY 1 1.0000
|
|
test t2 PRIMARY 2 1.0000
|
|
test t2 idx2 1 7.0000
|
|
test t2 idx2 2 2.3846
|
|
test t2 idx2 3 1.0000
|
|
test t2 idx2 4 1.0000
|
|
test t2 idx3 1 8.5000
|
|
test t2 idx3 2 1.0000
|
|
test t2 idx3 3 1.0000
|
|
test t2 idx4 1 6.2000
|
|
test t2 idx4 2 1.7222
|
|
test t2 idx4 3 1.1154
|
|
test t2 idx4 4 1.0000
|
|
ALTER TABLE t2 CHANGE COLUMN b b varchar(32);
|
|
SELECT * FROM mysql.index_stats ORDER BY index_name, prefix_arity, table_name;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t2 PRIMARY 1 1.0000
|
|
test t2 PRIMARY 2 1.0000
|
|
test t2 idx2 1 7.0000
|
|
test t2 idx2 2 2.3846
|
|
test t2 idx2 3 1.0000
|
|
test t2 idx2 4 1.0000
|
|
test t2 idx3 1 8.5000
|
|
test t2 idx3 2 1.0000
|
|
test t2 idx3 3 1.0000
|
|
test t2 idx4 1 6.2000
|
|
test t2 idx4 2 1.7222
|
|
test t2 idx4 3 1.1154
|
|
test t2 idx4 4 1.0000
|
|
ANALYZE TABLE t2 PERSISTENT FOR COLUMNS ALL INDEXES ALL;
|
|
Table Op Msg_type Msg_text
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status OK
|
|
SELECT * FROM mysql.index_stats ORDER BY index_name, prefix_arity, table_name;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t2 PRIMARY 1 1.0000
|
|
test t2 PRIMARY 2 1.0000
|
|
test t2 idx2 1 7.0000
|
|
test t2 idx2 2 2.3846
|
|
test t2 idx2 3 1.0000
|
|
test t2 idx2 4 1.0000
|
|
test t2 idx3 1 8.5000
|
|
test t2 idx3 2 1.0000
|
|
test t2 idx3 3 1.0000
|
|
test t2 idx4 1 6.2000
|
|
test t2 idx4 2 1.7222
|
|
test t2 idx4 3 1.1154
|
|
test t2 idx4 4 1.0000
|
|
ALTER TABLE t2 DROP COLUMN b, DROP PRIMARY KEY, ADD PRIMARY KEY(a);
|
|
SELECT * FROM mysql.index_stats ORDER BY index_name, prefix_arity, table_name;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t2 idx2 1 7.0000
|
|
test t2 idx2 2 2.3846
|
|
test t2 idx3 1 8.5000
|
|
ANALYZE TABLE t2 PERSISTENT FOR COLUMNS() INDEXES ALL;
|
|
Table Op Msg_type Msg_text
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status OK
|
|
SELECT * FROM mysql.index_stats ORDER BY index_name, prefix_arity, table_name;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t2 PRIMARY 1 1.0000
|
|
test t2 idx2 1 7.0000
|
|
test t2 idx2 2 2.3846
|
|
test t2 idx2 3 1.0000
|
|
test t2 idx3 1 8.5000
|
|
test t2 idx3 2 1.0000
|
|
test t2 idx4 1 6.2000
|
|
test t2 idx4 2 2.2308
|
|
test t2 idx4 3 1.0000
|
|
set optimizer_switch='extended_keys=off';
|
|
ALTER TABLE t1
|
|
DROP INDEX idx1,
|
|
DROP INDEX idx4;
|
|
ALTER TABLE t1
|
|
MODIFY COLUMN b text,
|
|
ADD INDEX idx1 (b(4), e),
|
|
ADD INDEX idx4 (e, b(4), d);
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t2 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t2 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t2 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t2 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t2 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t2 PRIMARY 1 1.0000
|
|
test t2 idx2 1 7.0000
|
|
test t2 idx2 2 2.3846
|
|
test t2 idx2 3 1.0000
|
|
test t2 idx3 1 8.5000
|
|
test t2 idx3 2 1.0000
|
|
test t2 idx4 1 6.2000
|
|
test t2 idx4 2 2.2308
|
|
test t2 idx4 3 1.0000
|
|
ANALYZE TABLE t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze Warning Engine-independent statistics are not collected for column 'b'
|
|
test.t1 analyze status OK
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
test t2 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t2 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t2 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t2 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t2 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx1 1 NULL
|
|
test t1 idx1 2 NULL
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx3 1 8.5000
|
|
test t1 idx4 1 6.2000
|
|
test t1 idx4 2 NULL
|
|
test t1 idx4 3 NULL
|
|
test t2 PRIMARY 1 1.0000
|
|
test t2 idx2 1 7.0000
|
|
test t2 idx2 2 2.3846
|
|
test t2 idx2 3 1.0000
|
|
test t2 idx3 1 8.5000
|
|
test t2 idx3 2 1.0000
|
|
test t2 idx4 1 6.2000
|
|
test t2 idx4 2 2.2308
|
|
test t2 idx4 3 1.0000
|
|
DELETE FROM mysql.table_stats;
|
|
DELETE FROM mysql.column_stats;
|
|
DELETE FROM mysql.index_stats;
|
|
ANALYZE TABLE mysql.column_stats PERSISTENT FOR ALL;
|
|
Table Op Msg_type Msg_text
|
|
mysql.column_stats analyze error Invalid argument
|
|
ANALYZE TABLE mysql.column_stats;
|
|
Table Op Msg_type Msg_text
|
|
mysql.column_stats analyze status OK
|
|
SELECT * FROM mysql.table_stats;
|
|
db_name table_name cardinality
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
set use_stat_tables='never';
|
|
ANALYZE TABLE t1 PERSISTENT FOR ALL;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze Warning Engine-independent statistics are not collected for column 'b'
|
|
test.t1 analyze status Table is already up to date
|
|
SELECT * FROM mysql.table_stats;
|
|
db_name table_name cardinality
|
|
test t1 40
|
|
SELECT * FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
|
|
test t1 a 0 49 0.0000 4.0000 1.0000 0 NULL NULL
|
|
test t1 c aaaa dddddddd 0.1250 6.6571 7.0000 0 NULL NULL
|
|
test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000 0 NULL NULL
|
|
test t1 e 0.01 0.112 0.2250 8.0000 6.2000 0 NULL NULL
|
|
test t1 f 1 5 0.2000 1.0000 6.4000 0 NULL NULL
|
|
SELECT * FROM mysql.index_stats;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
test t1 PRIMARY 1 1.0000
|
|
test t1 idx1 1 NULL
|
|
test t1 idx1 2 NULL
|
|
test t1 idx2 1 7.0000
|
|
test t1 idx2 2 2.3846
|
|
test t1 idx3 1 8.5000
|
|
test t1 idx4 1 6.2000
|
|
test t1 idx4 2 NULL
|
|
test t1 idx4 3 NULL
|
|
DELETE FROM mysql.table_stats;
|
|
DELETE FROM mysql.column_stats;
|
|
DELETE FROM mysql.index_stats;
|
|
ANALYZE TABLE t1 PERSISTENT FOR COLUMNS(b) INDEXES();
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze Warning Engine-independent statistics are not collected for column 'b'
|
|
test.t1 analyze status Table is already up to date
|
|
ANALYZE TABLE t1 PERSISTENT FOR columns(a,b) INDEXES();
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze Warning Engine-independent statistics are not collected for column 'b'
|
|
test.t1 analyze status Table is already up to date
|
|
ANALYZE TABLE t1 PERSISTENT FOR columns(b) indexes(idx2);
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze Warning Engine-independent statistics are not collected for column 'b'
|
|
test.t1 analyze status Table is already up to date
|
|
ANALYZE TABLE t1 PERSISTENT FOR columns() indexes(idx2);
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status Table is already up to date
|
|
DELETE FROM mysql.table_stats;
|
|
DELETE FROM mysql.column_stats;
|
|
DELETE FROM mysql.index_stats;
|
|
DROP TABLE t1,t2;
|
|
set names utf8;
|
|
CREATE DATABASE world;
|
|
use world;
|
|
CREATE TABLE Country (
|
|
Code char(3) NOT NULL default '',
|
|
Name char(52) NOT NULL default '',
|
|
SurfaceArea float(10,2) NOT NULL default '0.00',
|
|
Population int(11) NOT NULL default '0',
|
|
Capital int(11) default NULL,
|
|
PRIMARY KEY (Code),
|
|
UNIQUE INDEX (Name)
|
|
) CHARACTER SET utf8 COLLATE utf8_bin;
|
|
CREATE TABLE City (
|
|
ID int(11) NOT NULL auto_increment,
|
|
Name char(35) NOT NULL default '',
|
|
Country char(3) NOT NULL default '',
|
|
Population int(11) NOT NULL default '0',
|
|
PRIMARY KEY (ID),
|
|
INDEX (Population),
|
|
INDEX (Country)
|
|
) CHARACTER SET utf8 COLLATE utf8_bin;
|
|
CREATE TABLE CountryLanguage (
|
|
Country char(3) NOT NULL default '',
|
|
Language char(30) NOT NULL default '',
|
|
Percentage float(3,1) NOT NULL default '0.0',
|
|
PRIMARY KEY (Country, Language),
|
|
INDEX (Percentage)
|
|
) CHARACTER SET utf8 COLLATE utf8_bin;
|
|
set use_stat_tables='preferably';
|
|
ANALYZE TABLE Country, City, CountryLanguage;
|
|
SELECT UPPER(db_name), UPPER(table_name), cardinality
|
|
FROM mysql.table_stats;
|
|
UPPER(db_name) UPPER(table_name) cardinality
|
|
WORLD CITY 4079
|
|
WORLD COUNTRY 239
|
|
WORLD COUNTRYLANGUAGE 984
|
|
SELECT UPPER(db_name), UPPER(table_name),
|
|
column_name, min_value, max_value, nulls_ratio, avg_length, avg_frequency
|
|
FROM mysql.column_stats;
|
|
UPPER(db_name) UPPER(table_name) column_name min_value max_value nulls_ratio avg_length avg_frequency
|
|
WORLD CITY Country ABW ZWE 0.0000 3.0000 17.5819
|
|
WORLD CITY ID 1 4079 0.0000 4.0000 1.0000
|
|
WORLD CITY Name A Coruña (La Coruña) Ürgenc 0.0000 8.6416 1.0195
|
|
WORLD CITY Population 42 10500000 0.0000 4.0000 1.0467
|
|
WORLD COUNTRY Capital 1 4074 0.0293 4.0000 1.0000
|
|
WORLD COUNTRY Code ABW ZWE 0.0000 3.0000 1.0000
|
|
WORLD COUNTRY Name Afghanistan Zimbabwe 0.0000 10.1088 1.0000
|
|
WORLD COUNTRY Population 0 1277558000 0.0000 4.0000 1.0575
|
|
WORLD COUNTRY SurfaceArea 0.40 17075400.00 0.0000 4.0000 1.0042
|
|
WORLD COUNTRYLANGUAGE Country ABW ZWE 0.0000 3.0000 4.2232
|
|
WORLD COUNTRYLANGUAGE Language Abhyasi [South]Mande 0.0000 7.1778 2.1532
|
|
WORLD COUNTRYLANGUAGE Percentage 0.0 99.9 0.0000 4.0000 2.7640
|
|
SELECT UPPER(db_name), UPPER(table_name),
|
|
index_name, prefix_arity, avg_frequency
|
|
FROM mysql.index_stats;
|
|
UPPER(db_name) UPPER(table_name) index_name prefix_arity avg_frequency
|
|
WORLD CITY Country 1 17.5819
|
|
WORLD CITY PRIMARY 1 1.0000
|
|
WORLD CITY Population 1 1.0467
|
|
WORLD COUNTRY Name 1 1.0000
|
|
WORLD COUNTRY PRIMARY 1 1.0000
|
|
WORLD COUNTRYLANGUAGE PRIMARY 1 4.2232
|
|
WORLD COUNTRYLANGUAGE PRIMARY 2 1.0000
|
|
WORLD COUNTRYLANGUAGE Percentage 1 2.7640
|
|
use test;
|
|
set use_stat_tables='never';
|
|
CREATE DATABASE world_innodb;
|
|
use world_innodb;
|
|
CREATE TABLE Country (
|
|
Code char(3) NOT NULL default '',
|
|
Name char(52) NOT NULL default '',
|
|
SurfaceArea float(10,2) NOT NULL default '0.00',
|
|
Population int(11) NOT NULL default '0',
|
|
Capital int(11) default NULL,
|
|
PRIMARY KEY (Code),
|
|
UNIQUE INDEX (Name)
|
|
) CHARACTER SET utf8 COLLATE utf8_bin;
|
|
CREATE TABLE City (
|
|
ID int(11) NOT NULL auto_increment,
|
|
Name char(35) NOT NULL default '',
|
|
Country char(3) NOT NULL default '',
|
|
Population int(11) NOT NULL default '0',
|
|
PRIMARY KEY (ID),
|
|
INDEX (Population),
|
|
INDEX (Country)
|
|
) CHARACTER SET utf8 COLLATE utf8_bin;
|
|
CREATE TABLE CountryLanguage (
|
|
Country char(3) NOT NULL default '',
|
|
Language char(30) NOT NULL default '',
|
|
Percentage float(3,1) NOT NULL default '0.0',
|
|
PRIMARY KEY (Country, Language),
|
|
INDEX (Percentage)
|
|
) CHARACTER SET utf8 COLLATE utf8_bin;
|
|
ALTER TABLE Country ENGINE=InnoDB;
|
|
ALTER TABLE City ENGINE=InnoDB;
|
|
ALTER TABLE CountryLanguage ENGINE=InnoDB;
|
|
set use_stat_tables='preferably';
|
|
ANALYZE TABLE Country, City, CountryLanguage;
|
|
SELECT UPPER(db_name), UPPER(table_name), cardinality
|
|
FROM mysql.table_stats;
|
|
UPPER(db_name) UPPER(table_name) cardinality
|
|
WORLD CITY 4079
|
|
WORLD COUNTRY 239
|
|
WORLD COUNTRYLANGUAGE 984
|
|
WORLD_INNODB CITY 4079
|
|
WORLD_INNODB COUNTRY 239
|
|
WORLD_INNODB COUNTRYLANGUAGE 984
|
|
SELECT UPPER(db_name), UPPER(table_name),
|
|
column_name, min_value, max_value, nulls_ratio, avg_length, avg_frequency
|
|
FROM mysql.column_stats;
|
|
UPPER(db_name) UPPER(table_name) column_name min_value max_value nulls_ratio avg_length avg_frequency
|
|
WORLD CITY Country ABW ZWE 0.0000 3.0000 17.5819
|
|
WORLD CITY ID 1 4079 0.0000 4.0000 1.0000
|
|
WORLD CITY Name A Coruña (La Coruña) Ürgenc 0.0000 8.6416 1.0195
|
|
WORLD CITY Population 42 10500000 0.0000 4.0000 1.0467
|
|
WORLD COUNTRY Capital 1 4074 0.0293 4.0000 1.0000
|
|
WORLD COUNTRY Code ABW ZWE 0.0000 3.0000 1.0000
|
|
WORLD COUNTRY Name Afghanistan Zimbabwe 0.0000 10.1088 1.0000
|
|
WORLD COUNTRY Population 0 1277558000 0.0000 4.0000 1.0575
|
|
WORLD COUNTRY SurfaceArea 0.40 17075400.00 0.0000 4.0000 1.0042
|
|
WORLD COUNTRYLANGUAGE Country ABW ZWE 0.0000 3.0000 4.2232
|
|
WORLD COUNTRYLANGUAGE Language Abhyasi [South]Mande 0.0000 7.1778 2.1532
|
|
WORLD COUNTRYLANGUAGE Percentage 0.0 99.9 0.0000 4.0000 2.7640
|
|
WORLD_INNODB CITY Country ABW ZWE 0.0000 3.0000 17.5819
|
|
WORLD_INNODB CITY ID 1 4079 0.0000 4.0000 1.0000
|
|
WORLD_INNODB CITY Name A Coruña (La Coruña) Ürgenc 0.0000 8.6416 1.0195
|
|
WORLD_INNODB CITY Population 42 10500000 0.0000 4.0000 1.0467
|
|
WORLD_INNODB COUNTRY Capital 1 4074 0.0293 4.0000 1.0000
|
|
WORLD_INNODB COUNTRY Code ABW ZWE 0.0000 3.0000 1.0000
|
|
WORLD_INNODB COUNTRY Name Afghanistan Zimbabwe 0.0000 10.1088 1.0000
|
|
WORLD_INNODB COUNTRY Population 0 1277558000 0.0000 4.0000 1.0575
|
|
WORLD_INNODB COUNTRY SurfaceArea 0.40 17075400.00 0.0000 4.0000 1.0042
|
|
WORLD_INNODB COUNTRYLANGUAGE Country ABW ZWE 0.0000 3.0000 4.2232
|
|
WORLD_INNODB COUNTRYLANGUAGE Language Abhyasi [South]Mande 0.0000 7.1778 2.1532
|
|
WORLD_INNODB COUNTRYLANGUAGE Percentage 0.0 99.9 0.0000 4.0000 2.7640
|
|
SELECT UPPER(db_name), UPPER(table_name),
|
|
index_name, prefix_arity, avg_frequency
|
|
FROM mysql.index_stats;
|
|
UPPER(db_name) UPPER(table_name) index_name prefix_arity avg_frequency
|
|
WORLD CITY Country 1 17.5819
|
|
WORLD CITY PRIMARY 1 1.0000
|
|
WORLD CITY Population 1 1.0467
|
|
WORLD COUNTRY Name 1 1.0000
|
|
WORLD COUNTRY PRIMARY 1 1.0000
|
|
WORLD COUNTRYLANGUAGE PRIMARY 1 4.2232
|
|
WORLD COUNTRYLANGUAGE PRIMARY 2 1.0000
|
|
WORLD COUNTRYLANGUAGE Percentage 1 2.7640
|
|
WORLD_INNODB CITY Country 1 17.5819
|
|
WORLD_INNODB CITY PRIMARY 1 1.0000
|
|
WORLD_INNODB CITY Population 1 1.0467
|
|
WORLD_INNODB COUNTRY Name 1 1.0000
|
|
WORLD_INNODB COUNTRY PRIMARY 1 1.0000
|
|
WORLD_INNODB COUNTRYLANGUAGE PRIMARY 1 4.2232
|
|
WORLD_INNODB COUNTRYLANGUAGE PRIMARY 2 1.0000
|
|
WORLD_INNODB COUNTRYLANGUAGE Percentage 1 2.7640
|
|
use world;
|
|
set use_stat_tables='preferably';
|
|
set histogram_size=100;
|
|
set histogram_type='SINGLE_PREC_HB';
|
|
ANALYZE TABLE CountryLanguage;
|
|
set histogram_size=254;
|
|
set histogram_type='DOUBLE_PREC_HB';
|
|
ANALYZE TABLE City;
|
|
FLUSH TABLES;
|
|
select UPPER(db_name),UPPER(table_name),UPPER(column_name),min_value,max_value,nulls_ratio,avg_length,avg_frequency,hist_size,hist_type,hex(histogram),decode_histogram(hist_type,histogram) from mysql.column_stats where UPPER(db_name)='WORLD' and UPPER(table_name)='COUNTRYLANGUAGE' and UPPER(column_name) = 'PERCENTAGE';;
|
|
UPPER(db_name) WORLD
|
|
UPPER(table_name) COUNTRYLANGUAGE
|
|
UPPER(column_name) PERCENTAGE
|
|
min_value 0.0
|
|
max_value 99.9
|
|
nulls_ratio 0.0000
|
|
avg_length 4.0000
|
|
avg_frequency 2.7640
|
|
hist_size 100
|
|
hist_type SINGLE_PREC_HB
|
|
hex(histogram) 0000000000000000000000000101010101010101010202020303030304040404050505050606070707080809090A0A0B0C0D0D0E0E0F10111213131415161718191B1C1E202224292A2E33373B4850575F6A76818C9AA7B9C4CFDADFE5EBF0F4F8FAFCFF
|
|
decode_histogram(hist_type,histogram) 0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.004,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.004,0.000,0.000,0.004,0.000,0.000,0.000,0.004,0.000,0.000,0.000,0.004,0.000,0.000,0.000,0.004,0.000,0.004,0.000,0.000,0.004,0.000,0.004,0.000,0.004,0.000,0.004,0.004,0.004,0.000,0.004,0.000,0.004,0.004,0.004,0.004,0.004,0.000,0.004,0.004,0.004,0.004,0.004,0.004,0.008,0.004,0.008,0.008,0.008,0.008,0.020,0.004,0.016,0.020,0.016,0.016,0.051,0.031,0.027,0.031,0.043,0.047,0.043,0.043,0.055,0.051,0.071,0.043,0.043,0.043,0.020,0.024,0.024,0.020,0.016,0.016,0.008,0.008,0.012,0.000
|
|
select UPPER(db_name),UPPER(table_name),UPPER(column_name),min_value,max_value,nulls_ratio,avg_length,avg_frequency,hist_size,hist_type,hex(histogram),decode_histogram(hist_type,histogram) from mysql.column_stats where UPPER(db_name)='WORLD' and UPPER(table_name)='CITY' and UPPER(column_name) = 'POPULATION';;
|
|
UPPER(db_name) WORLD
|
|
UPPER(table_name) CITY
|
|
UPPER(column_name) POPULATION
|
|
min_value 42
|
|
max_value 10500000
|
|
nulls_ratio 0.0000
|
|
avg_length 4.0000
|
|
avg_frequency 1.0467
|
|
hist_size 254
|
|
hist_type DOUBLE_PREC_HB
|
|
hex(histogram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
|
|
decode_histogram(hist_type,histogram) 0.00047,0.00198,0.00601,0.00008,0.00008,0.00005,0.00011,0.00006,0.00009,0.00008,0.00006,0.00009,0.00008,0.00009,0.00008,0.00009,0.00006,0.00006,0.00008,0.00008,0.00008,0.00011,0.00009,0.00008,0.00009,0.00006,0.00011,0.00006,0.00012,0.00012,0.00012,0.00012,0.00011,0.00011,0.00014,0.00011,0.00011,0.00011,0.00014,0.00006,0.00011,0.00009,0.00011,0.00009,0.00015,0.00015,0.00015,0.00009,0.00018,0.00015,0.00015,0.00015,0.00017,0.00018,0.00018,0.00015,0.00018,0.00020,0.00024,0.00021,0.00023,0.00027,0.00024,0.00024,0.00027,0.00023,0.00020,0.00029,0.00020,0.00027,0.00020,0.00027,0.00026,0.00034,0.00024,0.00034,0.00031,0.00037,0.00043,0.00038,0.00038,0.00035,0.00047,0.00056,0.00058,0.00041,0.00047,0.00056,0.00072,0.00044,0.00060,0.00072,0.00061,0.00072,0.00066,0.00085,0.00075,0.00078,0.00082,0.00073,0.00108,0.00089,0.00105,0.00105,0.00151,0.00150,0.00110,0.00145,0.00163,0.00160,0.00165,0.00232,0.00201,0.00371,0.00365,0.00383,0.00459,0.00583,0.00662,0.00984,0.00969,0.01080,0.01379,0.02063,0.04308,0.05960,0.15816,0.59464
|
|
set histogram_type=default;
|
|
set histogram_size=default;
|
|
use test;
|
|
DROP DATABASE world;
|
|
SELECT UPPER(db_name), UPPER(table_name), cardinality
|
|
FROM mysql.table_stats;
|
|
UPPER(db_name) UPPER(table_name) cardinality
|
|
WORLD_INNODB CITY 4079
|
|
WORLD_INNODB COUNTRY 239
|
|
WORLD_INNODB COUNTRYLANGUAGE 984
|
|
SELECT UPPER(db_name), UPPER(table_name),
|
|
column_name, min_value, max_value, nulls_ratio, avg_length, avg_frequency
|
|
FROM mysql.column_stats;
|
|
UPPER(db_name) UPPER(table_name) column_name min_value max_value nulls_ratio avg_length avg_frequency
|
|
WORLD_INNODB CITY Country ABW ZWE 0.0000 3.0000 17.5819
|
|
WORLD_INNODB CITY ID 1 4079 0.0000 4.0000 1.0000
|
|
WORLD_INNODB CITY Name A Coruña (La Coruña) Ürgenc 0.0000 8.6416 1.0195
|
|
WORLD_INNODB CITY Population 42 10500000 0.0000 4.0000 1.0467
|
|
WORLD_INNODB COUNTRY Capital 1 4074 0.0293 4.0000 1.0000
|
|
WORLD_INNODB COUNTRY Code ABW ZWE 0.0000 3.0000 1.0000
|
|
WORLD_INNODB COUNTRY Name Afghanistan Zimbabwe 0.0000 10.1088 1.0000
|
|
WORLD_INNODB COUNTRY Population 0 1277558000 0.0000 4.0000 1.0575
|
|
WORLD_INNODB COUNTRY SurfaceArea 0.40 17075400.00 0.0000 4.0000 1.0042
|
|
WORLD_INNODB COUNTRYLANGUAGE Country ABW ZWE 0.0000 3.0000 4.2232
|
|
WORLD_INNODB COUNTRYLANGUAGE Language Abhyasi [South]Mande 0.0000 7.1778 2.1532
|
|
WORLD_INNODB COUNTRYLANGUAGE Percentage 0.0 99.9 0.0000 4.0000 2.7640
|
|
SELECT UPPER(db_name), UPPER(table_name),
|
|
index_name, prefix_arity, avg_frequency
|
|
FROM mysql.index_stats;
|
|
UPPER(db_name) UPPER(table_name) index_name prefix_arity avg_frequency
|
|
WORLD_INNODB CITY Country 1 17.5819
|
|
WORLD_INNODB CITY PRIMARY 1 1.0000
|
|
WORLD_INNODB CITY Population 1 1.0467
|
|
WORLD_INNODB COUNTRY Name 1 1.0000
|
|
WORLD_INNODB COUNTRY PRIMARY 1 1.0000
|
|
WORLD_INNODB COUNTRYLANGUAGE PRIMARY 1 4.2232
|
|
WORLD_INNODB COUNTRYLANGUAGE PRIMARY 2 1.0000
|
|
WORLD_INNODB COUNTRYLANGUAGE Percentage 1 2.7640
|
|
DROP DATABASE world_innodb;
|
|
SELECT UPPER(db_name), UPPER(table_name), cardinality
|
|
FROM mysql.table_stats;
|
|
UPPER(db_name) UPPER(table_name) cardinality
|
|
SELECT UPPER(db_name), UPPER(table_name),
|
|
column_name, min_value, max_value, nulls_ratio, avg_length, avg_frequency
|
|
FROM mysql.column_stats;
|
|
UPPER(db_name) UPPER(table_name) column_name min_value max_value nulls_ratio avg_length avg_frequency
|
|
SELECT UPPER(db_name), UPPER(table_name),
|
|
index_name, prefix_arity, avg_frequency
|
|
FROM mysql.index_stats;
|
|
UPPER(db_name) UPPER(table_name) index_name prefix_arity avg_frequency
|
|
DELETE FROM mysql.table_stats;
|
|
DELETE FROM mysql.column_stats;
|
|
DELETE FROM mysql.index_stats;
|
|
#
|
|
# Bug mdev-4357: empty string as a value of the HIST_SIZE column
|
|
# from mysql.column_stats
|
|
#
|
|
create table t1 (a int);
|
|
insert into t1 values (1),(2),(3);
|
|
set histogram_size=10;
|
|
analyze table t1 persistent for all;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status OK
|
|
select db_name, table_name, column_name,
|
|
min_value, max_value,
|
|
nulls_ratio, avg_frequency,
|
|
hist_size, hist_type, HEX(histogram)
|
|
FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_frequency hist_size hist_type HEX(histogram)
|
|
test t1 a 1 3 0.0000 1.0000 10 SINGLE_PREC_HB 0000007F7F7F7FFFFFFF
|
|
set histogram_size=default;
|
|
drop table t1;
|
|
#
|
|
# Bug mdev-4359: wrong setting of the HIST_SIZE column
|
|
# (see also mdev-4357) from mysql.column_stats
|
|
#
|
|
create table t1 ( a int);
|
|
insert into t1 values (1),(2),(3),(4),(5);
|
|
set histogram_size=10;
|
|
set histogram_type='double_prec_hb';
|
|
show variables like 'histogram%';
|
|
Variable_name Value
|
|
histogram_size 10
|
|
histogram_type DOUBLE_PREC_HB
|
|
analyze table t1 persistent for all;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status OK
|
|
select db_name, table_name, column_name,
|
|
min_value, max_value,
|
|
nulls_ratio, avg_frequency,
|
|
hist_size, hist_type, HEX(histogram)
|
|
FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_frequency hist_size hist_type HEX(histogram)
|
|
test t1 a 1 5 0.0000 1.0000 10 DOUBLE_PREC_HB 0000FF3FFF7FFFBFFFFF
|
|
set histogram_size=default;
|
|
set histogram_type=default;
|
|
drop table t1;
|
|
#
|
|
# Bug mdev-4369: histogram for a column with many distinct values
|
|
#
|
|
CREATE TABLE t1 (id int);
|
|
CREATE TABLE t2 (id int);
|
|
INSERT INTO t1 (id) VALUES (1), (1), (1),(1);
|
|
INSERT INTO t1 (id) SELECT id FROM t1;
|
|
INSERT INTO t1 SELECT id+1 FROM t1;
|
|
INSERT INTO t1 SELECT id+2 FROM t1;
|
|
INSERT INTO t1 SELECT id+4 FROM t1;
|
|
INSERT INTO t1 SELECT id+8 FROM t1;
|
|
INSERT INTO t1 SELECT id+16 FROM t1;
|
|
INSERT INTO t1 SELECT id+32 FROM t1;
|
|
INSERT INTO t1 SELECT id+64 FROM t1;
|
|
INSERT INTO t1 SELECT id+128 FROM t1;
|
|
INSERT INTO t1 SELECT id+256 FROM t1;
|
|
INSERT INTO t1 SELECT id+512 FROM t1;
|
|
INSERT INTO t2 SELECT id FROM t1 ORDER BY id*rand();
|
|
SELECT COUNT(*) FROM t2;
|
|
COUNT(*)
|
|
8192
|
|
SELECT COUNT(DISTINCT id) FROM t2;
|
|
COUNT(DISTINCT id)
|
|
1024
|
|
set @@tmp_table_size=1024*16;
|
|
set @@max_heap_table_size=1024*16;
|
|
set histogram_size=63;
|
|
analyze table t2 persistent for all;
|
|
Table Op Msg_type Msg_text
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status OK
|
|
select db_name, table_name, column_name,
|
|
min_value, max_value,
|
|
nulls_ratio, avg_frequency,
|
|
hist_size, hist_type, HEX(histogram)
|
|
FROM mysql.column_stats;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_frequency hist_size hist_type HEX(histogram)
|
|
test t2 id 1 1024 0.0000 8.0000 63 SINGLE_PREC_HB 03070B0F13171B1F23272B2F33373B3F43474B4F53575B5F63676B6F73777B7F83878B8F93979B9FA3A7ABAFB3B7BBBFC3C7CBCFD3D7DBDFE3E7EBEFF3F7FB
|
|
set histogram_size=default;
|
|
drop table t1, t2;
|
|
set use_stat_tables=@save_use_stat_tables;
|
|
#
|
|
# Bug MDEV-7383: min/max value for a column not utf8 compatible
|
|
#
|
|
create table t1 (a varchar(100)) engine=MyISAM;
|
|
insert into t1 values(unhex('D879626AF872675F73E662F8'));
|
|
analyze table t1 persistent for all;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status OK
|
|
show warnings;
|
|
Level Code Message
|
|
select db_name, table_name, column_name,
|
|
HEX(min_value), HEX(max_value),
|
|
nulls_ratio, avg_frequency,
|
|
hist_size, hist_type, HEX(histogram)
|
|
FROM mysql.column_stats;
|
|
db_name table_name column_name HEX(min_value) HEX(max_value) nulls_ratio avg_frequency hist_size hist_type HEX(histogram)
|
|
test t1 a D879626AF872675F73E662F8 D879626AF872675F73E662F8 0.0000 1.0000 0 NULL NULL
|
|
drop table t1;
|
|
#
|
|
# MDEB-9744: session optimizer_use_condition_selectivity=5 causing SQL Error (1918):
|
|
# Encountered illegal value '' when converting to DECIMAL
|
|
#
|
|
set @save_optimizer_use_condition_selectivity= @@optimizer_use_condition_selectivity;
|
|
set optimizer_use_condition_selectivity=3, use_stat_tables=preferably;
|
|
create table t1 (id int(10),cost decimal(9,2)) engine=innodb;
|
|
ANALYZE TABLE t1 PERSISTENT FOR ALL;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status OK
|
|
create temporary table t2 (id int);
|
|
insert into t2 (id) select id from t1 where cost > 0;
|
|
select * from t2;
|
|
id
|
|
set use_stat_tables=@save_use_stat_tables;
|
|
set optimizer_use_condition_selectivity= @save_optimizer_use_condition_selectivity;
|
|
drop table t1,t2;
|
|
#
|
|
# MDEV-16507: statistics for temporary tables should not be used
|
|
#
|
|
SET
|
|
@save_optimizer_use_condition_selectivity= @@optimizer_use_condition_selectivity;
|
|
SET @@use_stat_tables = preferably ;
|
|
SET @@optimizer_use_condition_selectivity = 4;
|
|
CREATE TABLE t1 (
|
|
TIMESTAMP TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
|
|
ON UPDATE CURRENT_TIMESTAMP
|
|
);
|
|
SET @had_t1_table= @@warning_count != 0;
|
|
CREATE TEMPORARY TABLE tmp_t1 LIKE t1;
|
|
INSERT INTO tmp_t1 VALUES (now());
|
|
INSERT INTO t1 SELECT * FROM tmp_t1 WHERE @had_t1_table=0;
|
|
DROP TABLE t1;
|
|
SET
|
|
use_stat_tables=@save_use_stat_tables;
|
|
SET
|
|
optimizer_use_condition_selectivity= @save_optimizer_use_condition_selectivity;
|
|
# End of 10.0 tests
|
|
#
|
|
# MDEV-9590: Always print "Engine-independent statistic" warnings and
|
|
# might be filtering columns unintentionally from engines
|
|
#
|
|
set use_stat_tables='NEVER';
|
|
create table t1 (test blob);
|
|
show variables like 'use_stat_tables';
|
|
Variable_name Value
|
|
use_stat_tables NEVER
|
|
analyze table t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Table is already up to date
|
|
drop table t1;
|
|
#
|
|
# MDEV-10435 crash with bad stat tables
|
|
#
|
|
set use_stat_tables='preferably';
|
|
call mtr.add_suppression("Column count of mysql.table_stats is wrong. Expected 3, found 1. The table is probably corrupted");
|
|
rename table mysql.table_stats to test.table_stats;
|
|
flush tables;
|
|
create table t1 (a int);
|
|
rename table t1 to t2, t3 to t4;
|
|
ERROR 42S02: Table 'test.t3' doesn't exist
|
|
drop table t1;
|
|
rename table test.table_stats to mysql.table_stats;
|
|
rename table mysql.table_stats to test.table_stats;
|
|
create table mysql.table_stats (a int);
|
|
flush tables;
|
|
create table t1 (a int);
|
|
rename table t1 to t2, t3 to t4;
|
|
ERROR 42S02: Table 'test.t3' doesn't exist
|
|
drop table t1, mysql.table_stats;
|
|
rename table test.table_stats to mysql.table_stats;
|
|
set use_stat_tables=@save_use_stat_tables;
|
|
#
|
|
# Start of 10.2 tests
|
|
#
|
|
#
|
|
# MDEV-10134 Add full support for DEFAULT
|
|
#
|
|
CREATE TABLE t1 (a BLOB, b TEXT DEFAULT DECODE_HISTOGRAM('SINGLE_PREC_HB',a));
|
|
SHOW CREATE TABLE t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` blob DEFAULT NULL,
|
|
`b` text DEFAULT decode_histogram('SINGLE_PREC_HB',`a`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
INSERT INTO t1 (a) VALUES (0x0000000000000000000000000101010101010101010202020303030304040404050505050606070707080809090A0A0B0C0D0D0E0E0F10111213131415161718191B1C1E202224292A2E33373B4850575F6A76818C9AA7B9C4CFDADFE5EBF0F4F8FAFCFF);
|
|
SELECT b FROM t1;
|
|
b
|
|
0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.004,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.004,0.000,0.000,0.004,0.000,0.000,0.000,0.004,0.000,0.000,0.000,0.004,0.000,0.000,0.000,0.004,0.000,0.004,0.000,0.000,0.004,0.000,0.004,0.000,0.004,0.000,0.004,0.004,0.004,0.000,0.004,0.000,0.004,0.004,0.004,0.004,0.004,0.000,0.004,0.004,0.004,0.004,0.004,0.004,0.008,0.004,0.008,0.008,0.008,0.008,0.020,0.004,0.016,0.020,0.016,0.016,0.051,0.031,0.027,0.031,0.043,0.047,0.043,0.043,0.055,0.051,0.071,0.043,0.043,0.043,0.020,0.024,0.024,0.020,0.016,0.016,0.008,0.008,0.012,0.000
|
|
DROP TABLE t1;
|
|
#
|
|
# End of 10.2 tests
|
|
#
|