Gecko [ www.jdcpatala.org ]

Name	Size	Permission
basic.result	721 B	-rw-r--r--
basic.test	753 B	-rw-r--r--
drop_table.result	68 B	-rw-r--r--
drop_table.test	318 B	-rw-r--r--
gis.result	53.07 KB	-rw-r--r--
gis.test	219 B	-rw-r--r--
my.cnf	435 B	-rw-r--r--
pushed_join.inc	7.48 KB	-rw-r--r--
pushed_join.result	1.67 KB	-rw-r--r--
pushed_join.test	2.65 KB	-rw-r--r--

Code Editor : pushed_join.result

Check that ndb_join_pushdown variable exists and is enabled
#####
# Create test table and data
create table t1 (
a int not null,
b int not null,
c int not null,
d int not null,
primary key (`a`,`b`)
) engine=ndbcluster;
insert into t1 values
(1,1,1,1), (2,2,2,2), (3,3,3,3), (4,4,4,4),
(1,2,5,1), (1,3,1,2), (1,4,2,3),
(2,1,3,4), (2,3,4,5), (2,4,5,1),
(3,1,1,2), (3,2,2,3), (3,4,3,4),
(4,1,4,5), (4,2,5,1), (4,3,1,2);
####
# Check the basic pushed query
select * from t1
join t1 as t2 on t2.a = t1.b and t2.b = t1.c;

####
# Check that operation is not pushed if it prevents 'join buffer'
select straight_join count(*)
from t1 as x1
join t1 as x2 on x1.d > x2.a + 1000
join t1 as x3 on x1.c=x3.a and x1.d=x3.b;
Expected push message found in EXPLAIN;

####
# Check that operation is not pushed if it prevents 'join buffer'
# even though other operation is pushed
select *
from t1 as x1
join t1 as x2 on x1.a=1 and x1.c=x2.a and x1.d=x2.b
join t1 as x3
join t1 as x4 where x4.a=x3.c and x4.b=x1.d;
Expected push message found in EXPLAIN;

drop table t1;
create table t1 (
a int primary key,
b int,
c int,
index(b,c)
) engine = ndb;
insert into t1 values (1,null, 2);
insert into t1 values (2,1, null);
insert into t1 values (3,2,2);
insert into t1 values (4,null, 2);
insert into t1 values (5,1, null);
insert into t1 values (6,2,2);
####
# The query contains a 'dynamic range'("Range checked for each
# record..") and access type can not be choosen at prepare time
# Make sure t2 is not pushed.
select *
from t1
join t1 as t2 on (t2.b = t1.b or t2.b = t1.a)
join t1 as t3 on t3.a = t2.a
join t1 as t4 on t4.a = t3.b /* index scan disguised as JT_ALL */;
Expected push message found in EXPLAIN;

drop table t1;

${this.title}

Code Editor : pushed_join.result