mariadb/storage/oqgraph/mysql-test/oqgraph/isnull.result

DROP TABLE IF EXISTS graph_base;
DROP TABLE IF EXISTS graph;
DROP TABLE IF EXISTS graph2;
CREATE TABLE graph_base (
from_id INT UNSIGNED NOT NULL,
to_id INT UNSIGNED NOT NULL,
PRIMARY KEY (from_id,to_id),
INDEX (to_id)
) ENGINE=MyISAM;
CREATE TABLE graph (
latch   VARCHAR(32) NULL,
origid  BIGINT    UNSIGNED NULL,
destid  BIGINT    UNSIGNED NULL,
weight  DOUBLE    NULL,
seq     BIGINT    UNSIGNED NULL,
linkid  BIGINT    UNSIGNED NULL,
KEY (latch, origid, destid) USING HASH,
KEY (latch, destid, origid) USING HASH
) ENGINE=OQGRAPH DATA_TABLE='graph_base' ORIGID='from_id', DESTID='to_id';
INSERT INTO graph_base(from_id, to_id) VALUES (1,2), (2,1);
INSERT INTO graph_base(from_id, to_id) VALUES (1,3), (3,1);
INSERT INTO graph_base(from_id, to_id) VALUES (3,4), (4,3);
INSERT INTO graph_base(from_id, to_id) VALUES (5,6), (6,5);
select * from graph where latch is null;
latch	origid	destid	weight	seq	linkid
NULL	1	2	1	NULL	NULL
NULL	2	1	1	NULL	NULL
NULL	1	3	1	NULL	NULL
NULL	3	1	1	NULL	NULL
NULL	3	4	1	NULL	NULL
NULL	4	3	1	NULL	NULL
NULL	5	6	1	NULL	NULL
NULL	6	5	1	NULL	NULL
select * from graph where latch is null and origid=1;
latch	origid	destid	weight	seq	linkid
NULL	1	NULL	1	2	3
NULL	1	NULL	1	1	2
select * from graph where latch is null and destid=2;
latch	origid	destid	weight	seq	linkid
NULL	NULL	2	1	1	1
DROP TABLE graph;
DROP TABLE graph_base;