#
# Test of boolean operations with NULL
#

DROP TABLE IF EXISTS t1;

SELECT IF(NULL AND 1, 1, 2), IF(1 AND NULL, 1, 2);
SELECT NULL AND 1, 1 AND NULL, 0 AND NULL, NULL and 0;

create table t1 (a int);
insert into t1 values (0),(1),(NULL);
SELECT * FROM t1 WHERE IF(a AND 1, 0, 1);
SELECT * FROM t1 WHERE IF(1 AND a, 0, 1);
SELECT * FROM t1 where NOT(a AND 1);
SELECT * FROM t1 where NOT(1 AND a);
SELECT * FROM t1 where (a AND 1)=0;
SELECT * FROM t1 where (1 AND a)=0;
SELECT * FROM t1 where (1 AND a)=1;
SELECT * FROM t1 where (1 AND a) IS NULL;

# Verify that NULL optimisation works in AND clause:
SET @a=0, @b=0;
SELECT * FROM t1 WHERE NULL AND (@a:=@a+1);
SELECT * FROM t1 WHERE NOT(a>=0 AND NULL AND (@b:=@b+1));
SELECT * FROM t1 WHERE a=2 OR (NULL AND (@a:=@a+1));
SELECT * FROM t1 WHERE NOT(a=2 OR (NULL AND (@b:=@b+1)));
SELECT @a, @b;
DROP TABLE t1;