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543ae0093c
Bugfix for 53290, fast unique index creation fails on duplicate null values
Summary:
Bug in the fast index creation code incorrectly considers null
values to be duplicates during block merging. Innodb policy is that
multiple null values are allowed in a unique index. Null duplicates
were correctly ignored while sorting individual blocks and with slow
index creation.
Test Plan:
mtr, including new test, load dbs using deferred index creation
DiffCamp Revision: 110840
Reviewed By: mcallaghan
CC: mcallaghan, mysql-devel@lists
Revert Plan:
OK
18 lines
771 B
Plaintext
18 lines
771 B
Plaintext
create table bug53290 (x bigint) engine=innodb;
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insert into bug53290 () values (),(),(),(),(),(),(),(),(),(),(),();
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insert into bug53290 select * from bug53290;
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insert into bug53290 select * from bug53290;
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insert into bug53290 select * from bug53290;
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insert into bug53290 select * from bug53290;
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insert into bug53290 select * from bug53290;
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insert into bug53290 select * from bug53290;
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insert into bug53290 select * from bug53290;
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insert into bug53290 select * from bug53290;
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insert into bug53290 select * from bug53290;
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insert into bug53290 select * from bug53290;
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insert into bug53290 select * from bug53290;
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insert into bug53290 select * from bug53290;
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insert into bug53290 select * from bug53290;
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alter table bug53290 add unique index `idx` (x);
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drop table bug53290;
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