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MDEV-9505: Valgrind failure in SEL_ARG::store_min,find_used_partitions

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create_partition_index_description() had wrong logic to calculate
length of the key value buffer that is used by the range optimizer.

For some reason it used MAX(partitioning_columns_len,
subpartitioning_columns_len) while it should use SUM of these values.
This commit is contained in:
Sergei Petrunia
2016-02-01 19:36:22 +03:00
parent a4ff37e912
commit 74f15e2a7f
3 changed files with 42 additions and 11 deletions
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18
mysql-test/r/partition_pruning.result
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@ -3467,3 +3467,21 @@ id select_type table partitions type possible_keys key key_len ref rows Extra
1 PRIMARY t2 p_1000 ref PRIMARY PRIMARY 8 const 2 Using index
1 PRIMARY t1 p_1000 ALL PRIMARY NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
drop table t1,t2;
#
# MDEV-9505: Valgrind failure in SEL_ARG::store_min,find_used_partitions,...
#
create table t1 (a int, b char(10), c varchar(5), d int)
partition by range columns(a,b,c)
subpartition by key (c,d)
subpartitions 3
( partition p0 values less than (1,'abc','abc'),
partition p1 values less than (2,'abc','abc'),
partition p2 values less than (3,'abc','abc'),
partition p3 values less than (4,'abc','abc')
);
insert into t1 values (1,'a','b',1),(2,'a','b',2),(3,'a','b',3);
select * from t1 where (a = 1 AND b < 'd' AND (c = 'b' OR (c = 'c' AND d = 1)) OR
(a = 1 AND b >= 'a' AND (c = 'c' OR (c = 'd' AND d = 2))));
a b c d
1 a b 1
drop table t1;