33 lines
1.3 KiB
Plaintext
33 lines
1.3 KiB
Plaintext
CREATE TABLE abc(a int auto_increment PRIMARY KEY, b varchar(1024), c
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varchar(1024))ENGINE=INNODB;
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INSERT INTO abc (b,c) VALUES (repeat('b', 1024), repeat('c', 1024));
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INSERT INTO abc (b,c) SELECT b,c FROM abc;
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INSERT INTO abc (b,c) SELECT b,c FROM abc;
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INSERT INTO abc (b,c) SELECT b,c FROM abc;
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INSERT INTO abc (b,c) SELECT b,c FROM abc;
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INSERT INTO abc (b,c) SELECT b,c FROM abc;
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INSERT INTO abc (b,c) SELECT b,c FROM abc;
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INSERT INTO abc (b,c) SELECT b,c FROM abc;
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INSERT INTO abc (b,c) SELECT b,c FROM abc;
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INSERT INTO abc (b,c) SELECT b,c FROM abc;
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INSERT INTO abc (b,c) SELECT b,c FROM abc;
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INSERT INTO abc (b,c) SELECT b,c FROM abc;
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INSERT INTO abc (b,c) SELECT b,c FROM abc;
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INSERT INTO abc (b,c) SELECT b,c FROM abc;
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INSERT INTO abc (b,c) SELECT b,c FROM abc;
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SELECT DATA_LENGTH, INDEX_LENGTH from information_schema.TABLES WHERE
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TABLE_SCHEMA = 'test' AND TABLE_NAME = 'abc';
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DATA_LENGTH INDEX_LENGTH
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# 0
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ALTER TABLE abc add INDEX cc (c(800));
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SELECT DATA_LENGTH, INDEX_LENGTH from information_schema.TABLES WHERE
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TABLE_SCHEMA = 'test' AND TABLE_NAME = 'abc';
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DATA_LENGTH INDEX_LENGTH
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# 17809408
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ALTER TABLE abc add INDEX bb (b(800));
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SELECT DATA_LENGTH, INDEX_LENGTH from information_schema.TABLES WHERE
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TABLE_SCHEMA = 'test' AND TABLE_NAME = 'abc';
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DATA_LENGTH INDEX_LENGTH
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# 35618816
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DROP TABLE abc;
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