There is a repeatable test failure that was introduced by the MDEV-18922 fix:
CURRENT_TEST: heap.heap_hash
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--- /mariadb/10.4/mysql-test/suite/heap/heap_hash.result 2019-03-15 18:06:34.123298015 +0200
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+++ /mariadb/10.4/mysql-test/suite/heap/heap_hash.reject 2019-03-15 18:08:34.912797504 +0200
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@@ -66,7 +66,7 @@
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alter table t1 engine=myisam;
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explain select * from t1 where a in (869751,736494,226312,802616);
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id select_type table type possible_keys key key_len ref rows Extra
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-1 SIMPLE t1 index uniq_id uniq_id 8 NULL 5 Using where; Using index
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+1 SIMPLE t1 ALL uniq_id NULL NULL NULL 5 Using where
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drop table t1;
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create table t1 (x int not null, y int not null, key x using HASH (x), unique y using HASH (y))
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engine=heap;
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mysqltest: Result length mismatch
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This line was last modified by MDEV-371, but it only replaced 4 with the 8 that is now being removed. After the MDEV-19822 fix, we are no longer "Using index". This looks like a potential performance regression for storage engines that support heap indexes.
- is caused by
-
MDEV-18922
Alter on long unique varchar column makes result null
-
-
Closed
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