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BUG#27939: Early NULLs filtering doesn't work for eq_ref access

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- Turn it on for JT_EQ_REF access method
This commit is contained in:
sergefp@mysql.com 2007-04-19 03:04:23 +04:00
parent 7d71d58076
commit 83e6352cc9
5 changed files with 127 additions and 2 deletions
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35
mysql-test/r/bdb_notembedded.result Normal file
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@ -0,0 +1,35 @@
set autocommit=1;
reset master;
create table bug16206 (a int);
insert into bug16206 values(1);
start transaction;
insert into bug16206 values(2);
commit;
show binlog events;
Log_name Pos Event_type Server_id End_log_pos Info
f n Format_desc 1 n Server ver: VERSION, Binlog ver: 4
f n Query 1 n use `test`; create table bug16206 (a int)
f n Query 1 n use `test`; insert into bug16206 values(1)
f n Query 1 n use `test`; insert into bug16206 values(2)
drop table bug16206;
reset master;
create table bug16206 (a int) engine= bdb;
insert into bug16206 values(0);
insert into bug16206 values(1);
start transaction;
insert into bug16206 values(2);
commit;
insert into bug16206 values(3);
show binlog events;
Log_name Pos Event_type Server_id End_log_pos Info
f n Format_desc 1 n Server ver: VERSION, Binlog ver: 4
f n Query 1 n use `test`; create table bug16206 (a int) engine= bdb
f n Query 1 n use `test`; insert into bug16206 values(0)
f n Query 1 n use `test`; insert into bug16206 values(1)
f n Query 1 n use `test`; BEGIN
f n Query 1 n use `test`; insert into bug16206 values(2)
f n Query 1 n use `test`; COMMIT
f n Query 1 n use `test`; insert into bug16206 values(3)
drop table bug16206;
set autocommit=0;
End of 5.0 tests

28
mysql-test/r/join.result
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@ -779,4 +779,32 @@ Field Type Null Key Default Extra
Name varchar(50) YES NULL
DROP VIEW v1;
DROP TABLE t1,t2,tv1,tv2;
create table t1 (a int, b int);
insert into t1 values
(NULL, 1),
(NULL, 2),
(NULL, 3),
(NULL, 4);
create table t2 (a int not null, primary key(a));
insert into t2 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t3 (a int not null, primary key(a));
insert into t3 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
flush status;
select * from t1, t2, t3 where t3.a=t1.a and t2.a=t1.b;
a b a a
explain select * from t1, t2, t3 where t3.a=t1.a and t2.a=t1.b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 4
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 Using index
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index
We expect rnd_next=5, and read_key must be 0 because of short-cutting:
show status like 'Handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_rnd 0
Handler_read_rnd_next 5
drop table t1, t2, t3;
End of 5.0 tests.

38
mysql-test/t/bdb_notembedded.test Normal file
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@ -0,0 +1,38 @@
-- source include/not_embedded.inc
-- source include/have_bdb.inc
#
# Bug #16206: Superfluous COMMIT event in binlog when updating BDB in autocommit mode
#
set autocommit=1;
let $VERSION=`select version()`;
reset master;
create table bug16206 (a int);
insert into bug16206 values(1);
start transaction;
insert into bug16206 values(2);
commit;
--replace_result $VERSION VERSION
--replace_column 1 f 2 n 5 n
show binlog events;
drop table bug16206;
reset master;
create table bug16206 (a int) engine= bdb;
insert into bug16206 values(0);
insert into bug16206 values(1);
start transaction;
insert into bug16206 values(2);
commit;
insert into bug16206 values(3);
--replace_result $VERSION VERSION
--replace_column 1 f 2 n 5 n
show binlog events;
drop table bug16206;
set autocommit=0;
--echo End of 5.0 tests

23
mysql-test/t/join.test
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@ -610,4 +610,27 @@ DESCRIBE tv2;
DROP VIEW v1;
DROP TABLE t1,t2,tv1,tv2;
# BUG#27939: Early NULLs filtering doesn't work for eq_ref access
create table t1 (a int, b int);
insert into t1 values
(NULL, 1),
(NULL, 2),
(NULL, 3),
(NULL, 4);
create table t2 (a int not null, primary key(a));
insert into t2 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t3 (a int not null, primary key(a));
insert into t3 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
flush status;
select * from t1, t2, t3 where t3.a=t1.a and t2.a=t1.b;
explain select * from t1, t2, t3 where t3.a=t1.a and t2.a=t1.b;
--echo We expect rnd_next=5, and read_key must be 0 because of short-cutting:
show status like 'Handler_read%';
drop table t1, t2, t3;
--echo End of 5.0 tests.

5
sql/sql_select.cc
View file

@ -5444,8 +5444,9 @@ static void add_not_null_conds(JOIN *join)
for (uint i=join->const_tables ; i < join->tables ; i++)
{
JOIN_TAB *tab=join->join_tab+i;
if ((tab->type == JT_REF || tab->type == JT_REF_OR_NULL) &&
!tab->table->maybe_null)
if ((tab->type == JT_REF || tab->type == JT_EQ_REF ||
tab->type == JT_REF_OR_NULL) &&
!tab->table->maybe_null)
{
for (uint keypart= 0; keypart < tab->ref.key_parts; keypart++)
{