mirror of
https://github.com/MariaDB/server.git
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455 lines
17 KiB
Text
455 lines
17 KiB
Text
drop table if exists t1,t2;
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CREATE VIEW table_stat AS
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SELECT * FROM mysql.table_stat;
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CREATE VIEW column_stat AS
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SELECT db_name, table_name, column_name,
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min_value, max_value,
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CAST(nulls_ratio AS decimal(12,4)) AS 'nulls_ratio',
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CAST(avg_length AS decimal(12,4)) AS 'avg_length',
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CAST(avg_frequency AS decimal(12,4)) AS 'avg_frequency'
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FROM mysql.column_stat;
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CREATE VIEW index_stat AS
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SELECT db_name, table_name, index_name, prefix_arity,
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CAST(avg_frequency AS decimal(12,4)) AS 'avg_frequency'
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FROM mysql.index_stat;
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DELETE FROM mysql.table_stat;
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DELETE FROM mysql.column_stat;
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DELETE FROM mysql.index_stat;
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set optimizer_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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);
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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 OK
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SELECT * FROM table_stat;
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db_name table_name cardinality
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test t1 40
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SELECT * FROM column_stat;
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db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency
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test t1 a 0 49 0.0000 4.0000 1.0000
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test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000
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test t1 c aaaa dddddddd 0.1250 6.6571 7.0000
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test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000
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test t1 e 0.01 0.112 0.2250 8.0000 6.2000
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test t1 f 1 5 0.2000 1.0000 6.4000
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SELECT * FROM index_stat;
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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 column_stat
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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
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test t1 a 0 49 0.0000 4.0000 1.0000
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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 column_stat
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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
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test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000
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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 column_stat
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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
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test t1 c aaaa dddddddd 0.1250 6.6571 7.0000
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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 column_stat
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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
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test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000
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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 column_stat
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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
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test t1 e 0.01 0.112 0.2250 8.0000 6.2000
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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 index_stat
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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 index_stat
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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 index_stat
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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 index_stat
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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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CREATE TABLE t2 LIKE t1;
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ALTER TABLE t2 ENGINE=InnoDB;
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INSERT INTO t2 SELECT * FROM t1;
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ANALYZE TABLE t2;
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Table Op Msg_type Msg_text
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test.t2 analyze status OK
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SELECT * FROM table_stat;
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db_name table_name cardinality
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test t1 40
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test t2 40
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SELECT * FROM column_stat ORDER BY column_name;
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db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency
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test t1 a 0 49 0.0000 4.0000 1.0000
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test t2 a 0 49 0.0000 4.0000 1.0000
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test t1 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000
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test t2 b vvvvvvvvvvvvv zzzzzzzzzzzzzzzzzz 0.2000 17.1250 6.4000
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test t1 c aaaa dddddddd 0.1250 6.6571 7.0000
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test t2 c aaaa dddddddd 0.1250 6.6571 7.0000
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test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000
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test t2 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000
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test t1 e 0.01 0.112 0.2250 8.0000 6.2000
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test t2 e 0.01 0.112 0.2250 8.0000 6.2000
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test t1 f 1 5 0.2000 1.0000 6.4000
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test t2 f 1 5 0.2000 1.0000 6.4000
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SELECT * FROM index_stat ORDER BY index_name, prefix_arity, table_name;
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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 t2 PRIMARY 1 1.0000
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test t1 idx1 1 6.4000
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test t2 idx1 1 6.4000
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test t1 idx1 2 1.6875
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test t2 idx1 2 1.6875
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test t1 idx2 1 7.0000
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test t2 idx2 1 7.0000
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test t1 idx2 2 2.3846
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test t2 idx2 2 2.3846
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test t1 idx3 1 8.5000
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test t2 idx3 1 8.5000
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test t1 idx4 1 6.2000
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test t2 idx4 1 6.2000
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test t1 idx4 2 1.6875
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test t2 idx4 2 1.6875
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test t1 idx4 3 1.1304
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test t2 idx4 3 1.1304
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DELETE FROM mysql.table_stat;
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DELETE FROM mysql.column_stat;
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DELETE FROM mysql.index_stat;
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ALTER TABLE t1
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DROP INDEX idx1,
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DROP INDEX idx4;
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ALTER TABLE t1
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MODIFY COLUMN b text,
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ADD INDEX idx1 (b(4), e),
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ADD INDEX idx4 (e, b(4), d);
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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 OK
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SELECT * FROM column_stat;
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db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency
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test t1 a 0 49 0.0000 4.0000 1.0000
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test t1 b NULL NULL 0.2000 17.1250 NULL
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test t1 c aaaa dddddddd 0.1250 6.6571 7.0000
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test t1 d 1989-03-12 1999-07-23 0.1500 3.0000 8.5000
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test t1 e 0.01 0.112 0.2250 8.0000 6.2000
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test t1 f 1 5 0.2000 1.0000 6.4000
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SELECT * FROM index_stat;
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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 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 idx1 1 NULL
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test t1 idx1 2 NULL
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test t1 idx4 1 6.2000
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test t1 idx4 2 NULL
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test t1 idx4 3 NULL
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DROP TABLE t1,t2;
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DELETE FROM mysql.table_stat;
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DELETE FROM mysql.column_stat;
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DELETE FROM mysql.index_stat;
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set optimizer_use_stat_tables='never';
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set names utf8;
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CREATE DATABASE world;
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use world;
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CREATE TABLE Country (
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Code char(3) NOT NULL default '',
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Name char(52) NOT NULL default '',
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SurfaceArea float(10,2) NOT NULL default '0.00',
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Population int(11) NOT NULL default '0',
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Capital int(11) default NULL,
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PRIMARY KEY (Code),
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UNIQUE INDEX (Name)
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) CHARACTER SET utf8 COLLATE utf8_bin;
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CREATE TABLE City (
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ID int(11) NOT NULL auto_increment,
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Name char(35) NOT NULL default '',
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Country char(3) NOT NULL default '',
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Population int(11) NOT NULL default '0',
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PRIMARY KEY (ID),
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INDEX (Population),
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INDEX (Country)
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) CHARACTER SET utf8 COLLATE utf8_bin;
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CREATE TABLE CountryLanguage (
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Country char(3) NOT NULL default '',
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Language char(30) NOT NULL default '',
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Percentage float(3,1) NOT NULL default '0.0',
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PRIMARY KEY (Country, Language),
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INDEX (Percentage)
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) CHARACTER SET utf8 COLLATE utf8_bin;
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set optimizer_use_stat_tables='preferably';
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ANALYZE TABLE Country, City, CountryLanguage;
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SELECT * FROM test.table_stat;
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db_name table_name cardinality
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world Country 239
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world City 4079
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world CountryLanguage 984
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SELECT * FROM test.column_stat;
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db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency
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world Country Code ABW ZWE 0.0000 3.0000 1.0000
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world Country Name Afghanistan Zimbabwe 0.0000 10.1088 1.0000
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world Country SurfaceArea 0.40 17075400.00 0.0000 4.0000 1.0042
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world Country Population 0 1277558000 0.0000 4.0000 1.0575
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world Country Capital 1 4074 0.0293 4.0000 1.0000
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world City ID 1 4079 0.0000 4.0000 1.0000
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world City Name A Coruña (La Coruña) Ürgenc 0.0000 8.6416 1.0195
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world City Country ABW ZWE 0.0000 3.0000 17.5819
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world City Population 42 10500000 0.0000 4.0000 1.0467
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world CountryLanguage Country ABW ZWE 0.0000 3.0000 4.2232
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world CountryLanguage Language Abhyasi [South]Mande 0.0000 7.1778 2.1532
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world CountryLanguage Percentage 0.0 99.9 0.0000 4.0000 2.7640
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SELECT * FROM test.index_stat;
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db_name table_name index_name prefix_arity avg_frequency
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world Country PRIMARY 1 1.0000
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world Country Name 1 1.0000
|
|
world City PRIMARY 1 1.0000
|
|
world City Population 1 1.0467
|
|
world City Country 1 17.5819
|
|
world CountryLanguage PRIMARY 1 4.2232
|
|
world CountryLanguage PRIMARY 2 1.0000
|
|
world CountryLanguage Percentage 1 2.7640
|
|
use test;
|
|
set optimizer_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 optimizer_use_stat_tables='preferably';
|
|
ANALYZE TABLE Country, City, CountryLanguage;
|
|
SELECT * FROM test.table_stat;
|
|
db_name table_name cardinality
|
|
world Country 239
|
|
world City 4079
|
|
world CountryLanguage 984
|
|
world_innodb Country 239
|
|
world_innodb City 4079
|
|
world_innodb CountryLanguage 984
|
|
SELECT * FROM test.column_stat;
|
|
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency
|
|
world Country Code ABW ZWE 0.0000 3.0000 1.0000
|
|
world Country Name Afghanistan Zimbabwe 0.0000 10.1088 1.0000
|
|
world Country SurfaceArea 0.40 17075400.00 0.0000 4.0000 1.0042
|
|
world Country Population 0 1277558000 0.0000 4.0000 1.0575
|
|
world Country Capital 1 4074 0.0293 4.0000 1.0000
|
|
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 Country ABW ZWE 0.0000 3.0000 17.5819
|
|
world City Population 42 10500000 0.0000 4.0000 1.0467
|
|
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 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 SurfaceArea 0.40 17075400.00 0.0000 4.0000 1.0042
|
|
world_innodb Country Population 0 1277558000 0.0000 4.0000 1.0575
|
|
world_innodb Country Capital 1 4074 0.0293 4.0000 1.0000
|
|
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 Country ABW ZWE 0.0000 3.0000 17.5819
|
|
world_innodb City Population 42 10500000 0.0000 4.0000 1.0467
|
|
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 * FROM test.index_stat;
|
|
db_name table_name index_name prefix_arity avg_frequency
|
|
world Country PRIMARY 1 1.0000
|
|
world Country Name 1 1.0000
|
|
world City PRIMARY 1 1.0000
|
|
world City Population 1 1.0467
|
|
world City Country 1 17.5819
|
|
world CountryLanguage PRIMARY 1 4.2232
|
|
world CountryLanguage PRIMARY 2 1.0000
|
|
world CountryLanguage Percentage 1 2.7640
|
|
world_innodb Country PRIMARY 1 1.0000
|
|
world_innodb Country Name 1 1.0000
|
|
world_innodb City PRIMARY 1 1.0000
|
|
world_innodb City Population 1 1.0467
|
|
world_innodb City Country 1 17.5819
|
|
world_innodb CountryLanguage PRIMARY 1 4.2232
|
|
world_innodb CountryLanguage PRIMARY 2 1.0000
|
|
world_innodb CountryLanguage Percentage 1 2.7640
|
|
use test;
|
|
DROP DATABASE world;
|
|
DROP DATABASE world_innodb;
|
|
DELETE FROM mysql.table_stat;
|
|
DELETE FROM mysql.column_stat;
|
|
DELETE FROM mysql.index_stat;
|
|
DROP VIEW test.table_stat;
|
|
DROP VIEW test.column_stat;
|
|
DROP VIEW test.index_stat;
|