mariadb/mysql-test/r/keyread.result
Sergei Golubchik d17093b2ed MDEV-12293 Assertion `table->no_keyread || !table->covering_keys.is_set(tab->index) || table->file->keyread == tab->index' failed
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
2017-04-30 14:58:11 +02:00

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create table t1 (f1 int not null, f2 int, f3 int, primary key (f1,f2), key(f2,f3)) engine=innodb;
create view v1 as select * from t1 where f2 = 1;
select distinct f1 from v1;
f1
drop view v1;
drop table t1;