11 lines
403 B
Plaintext
11 lines
403 B
Plaintext
SET foreign_key_checks=0;
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CREATE TABLE t1 (id int, foreign key (id) references t2(id)) ENGINE=INNODB;
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CREATE TABLE t2 (id int, foreign key (id) references t1(id)) ENGINE=INNODB;
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SET foreign_key_checks=1;
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SELECT COUNT(*) FROM information_schema.key_column_usage WHERE REFERENCED_TABLE_NAME in ('t1', 't2')
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AND table_schema != 'PERFORMANCE_SCHEMA';
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COUNT(*)
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2
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SET foreign_key_checks=0;
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DROP TABLE t1, t2;
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