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MDEV-6878: Use of uninitialized saved_primary_key in Mrr_ordered_index_reader::resume_read()

Browse Source 
(Backport to 5.3)
(variant #2, with fixed coding style)
- Make Mrr_ordered_index_reader::resume_read() restore index position 
  only if it was saved before with Mrr_ordered_index_reader::interrupt_read().
This commit is contained in:
Sergey Petrunya
2014-10-29 01:37:58 +03:00
parent 94c8f33569
commit 9cb002b359
4 changed files with 81 additions and 2 deletions
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38
mysql-test/r/innodb_mrr_cpk.result
View File

@ -149,3 +149,41 @@ set @@join_cache_level= @save_join_cache_level;
set storage_engine=@save_storage_engine;
set optimizer_switch=@innodb_mrr_cpk_tmp;
drop table t0;
#
# MDEV-6878: Use of uninitialized saved_primary_key in Mrr_ordered_index_reader::resume_read()
#
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (
pk varchar(32) character set utf8 primary key,
kp1 char(32) not null,
col1 varchar(32),
key (kp1)
) engine=innodb;
insert into t1
select
concat('pk-', 1000 +A.a),
concat('kp1-', 1000 +A.a),
concat('val-', 1000 +A.a)
from test.t0 A ;
create table t2 as select kp1 as a from t1;
set join_cache_level=8;
set optimizer_switch='mrr=on,mrr_sort_keys=on';
explain
select * from t2 straight_join t1 force index(kp1) where t1.kp1=t2.a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 10
1 SIMPLE t1 ref kp1 kp1 32 test.t2.a 1 Using join buffer (flat, BKAH join); Key-ordered Rowid-ordered scan
select * from t2 straight_join t1 force index(kp1) where t1.kp1=t2.a;
a pk kp1 col1
kp1-1000 pk-1000 kp1-1000 val-1000
kp1-1001 pk-1001 kp1-1001 val-1001
kp1-1002 pk-1002 kp1-1002 val-1002
kp1-1003 pk-1003 kp1-1003 val-1003
kp1-1004 pk-1004 kp1-1004 val-1004
kp1-1005 pk-1005 kp1-1005 val-1005
kp1-1006 pk-1006 kp1-1006 val-1006
kp1-1007 pk-1007 kp1-1007 val-1007
kp1-1008 pk-1008 kp1-1008 val-1008
kp1-1009 pk-1009 kp1-1009 val-1009
drop table t0,t1,t2;

29
mysql-test/t/innodb_mrr_cpk.test
View File

@ -139,3 +139,32 @@ set storage_engine=@save_storage_engine;
set optimizer_switch=@innodb_mrr_cpk_tmp;
drop table t0;
--echo #
--echo # MDEV-6878: Use of uninitialized saved_primary_key in Mrr_ordered_index_reader::resume_read()
--echo #
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (
pk varchar(32) character set utf8 primary key,
kp1 char(32) not null,
col1 varchar(32),
key (kp1)
) engine=innodb;
insert into t1
select
concat('pk-', 1000 +A.a),
concat('kp1-', 1000 +A.a),
concat('val-', 1000 +A.a)
from test.t0 A ;
create table t2 as select kp1 as a from t1;
set join_cache_level=8;
set optimizer_switch='mrr=on,mrr_sort_keys=on';
explain
select * from t2 straight_join t1 force index(kp1) where t1.kp1=t2.a;
select * from t2 straight_join t1 force index(kp1) where t1.kp1=t2.a;
drop table t0,t1,t2;