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MDEV-10397: Server crashes in key_copy with join_cache_level > 2 and join on BIT fields

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For BIT field null_bit is not set to 0 even for a field defined as NOT NULL.
So now in the function TABLE::create_key_part_by_field, if the bit field is not nullable
then the null_bit is explicitly set to 0
This commit is contained in:
Varun Gupta 2017-11-30 11:56:02 +02:00
parent 9b53e541f0
commit b8d1398b1d
4 changed files with 48 additions and 0 deletions
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13
mysql-test/r/join_outer.result
View File

@ -2339,5 +2339,18 @@ Warnings:
Note 1003 select `test`.`t1`.`col1` AS `col1`,`test`.`t2`.`col1` AS `col1`,`test`.`t2`.`col3` AS `col3` from `test`.`t1` left join `test`.`t2` on((`test`.`t2`.`col2` = `test`.`t1`.`col1`)) where (`f1`(`test`.`t2`.`col3`,0) = 0)
DROP FUNCTION f1;
DROP TABLE t1,t2;
#
# MDEV-10397: Server crashes in key_copy with join_cache_level > 2 and join on BIT fields
#
CREATE TABLE t1 (b1 BIT NOT NULL);
INSERT INTO t1 VALUES (0),(1);
CREATE TABLE t2 (b2 BIT NOT NULL);
INSERT INTO t2 VALUES (0),(1);
SET SESSION JOIN_CACHE_LEVEL = 3;
SELECT t1.b1+'0' , t2.b2 + '0' FROM t1 LEFT JOIN t2 ON b1 = b2;
t1.b1+'0' t2.b2 + '0'
0 0
1 1
DROP TABLE t1, t2;
# end of 5.5 tests
SET optimizer_switch=@save_optimizer_switch;

13
mysql-test/r/join_outer_jcl6.result
View File

@ -2350,6 +2350,19 @@ Warnings:
Note 1003 select `test`.`t1`.`col1` AS `col1`,`test`.`t2`.`col1` AS `col1`,`test`.`t2`.`col3` AS `col3` from `test`.`t1` left join `test`.`t2` on((`test`.`t2`.`col2` = `test`.`t1`.`col1`)) where (`f1`(`test`.`t2`.`col3`,0) = 0)
DROP FUNCTION f1;
DROP TABLE t1,t2;
#
# MDEV-10397: Server crashes in key_copy with join_cache_level > 2 and join on BIT fields
#
CREATE TABLE t1 (b1 BIT NOT NULL);
INSERT INTO t1 VALUES (0),(1);
CREATE TABLE t2 (b2 BIT NOT NULL);
INSERT INTO t2 VALUES (0),(1);
SET SESSION JOIN_CACHE_LEVEL = 3;
SELECT t1.b1+'0' , t2.b2 + '0' FROM t1 LEFT JOIN t2 ON b1 = b2;
t1.b1+'0' t2.b2 + '0'
0 0
1 1
DROP TABLE t1, t2;
# end of 5.5 tests
SET optimizer_switch=@save_optimizer_switch;
set join_cache_level=default;

14
mysql-test/t/join_outer.test
View File

@ -1881,6 +1881,20 @@ DROP FUNCTION f1;
DROP TABLE t1,t2;
--echo #
--echo # MDEV-10397: Server crashes in key_copy with join_cache_level > 2 and join on BIT fields
--echo #
CREATE TABLE t1 (b1 BIT NOT NULL);
INSERT INTO t1 VALUES (0),(1);
CREATE TABLE t2 (b2 BIT NOT NULL);
INSERT INTO t2 VALUES (0),(1);
SET SESSION JOIN_CACHE_LEVEL = 3;
SELECT t1.b1+'0' , t2.b2 + '0' FROM t1 LEFT JOIN t2 ON b1 = b2;
DROP TABLE t1, t2;
--echo # end of 5.5 tests
SET optimizer_switch=@save_optimizer_switch;

8
sql/table.cc
View File

@ -5987,6 +5987,14 @@ void TABLE::create_key_part_by_field(KEY_PART_INFO *key_part_info,
might be reused.
*/
key_part_info->store_length= key_part_info->length;
/*
For BIT fields null_bit is not set to 0 even if the field is defined
as NOT NULL, look at Field_bit::Field_bit
*/
if (!field->real_maybe_null())
{
key_part_info->null_bit= 0;
}
/*
The total store length of the key part is the raw length of the field +