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sometimes the optimizer starts a keyread on some index and later (but before any actual index accesses) changes it to a keyread on a different index
7 lines
207 B
Plaintext
7 lines
207 B
Plaintext
create table t1 (f1 int not null, f2 int, f3 int, primary key (f1,f2), key(f2,f3)) engine=innodb;
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create view v1 as select * from t1 where f2 = 1;
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select distinct f1 from v1;
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f1
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drop view v1;
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drop table t1;
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