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#
# Test of different EXPLAIN's
--disable_warnings
drop table if exists t1;
--enable_warnings
create TEMPORARY table t1 (id int not null, str char(10), unique(str)) ENGINE=MYISAM;
explain select * from t1;
insert into t1 values (1, null),(2, null),(3, "foo"),(4, "bar");
select * from t1 where str is null;
select * from t1 where str="foo";
explain select * from t1 where str is null;
explain select * from t1 where str="foo";
explain select * from t1 ignore key (str) where str="foo";
explain select * from t1 use key (str,str) where str="foo";
#The following should give errors
--error ER_KEY_DOES_NOT_EXITS
explain select * from t1 use key (str,str,foo) where str="foo";
--error ER_KEY_DOES_NOT_EXITS
explain select * from t1 ignore key (str,str,foo) where str="foo";
drop table t1;
explain select 1;
create TEMPORARY table t1 (a int not null) ENGINE=myisam;
explain select count(*) from t1;
insert into t1 values(1);
explain select count(*) from t1;
insert into t1 values(1);
explain select count(*) from t1;
drop table t1;
#
# Bug #3403 Wrong encoding in EXPLAIN SELECT output
#
create TEMPORARY table ☃ (☢ int, ☣ int, key ☢ (☢), key ☣ (☢,☣)) ENGINE=MYISAM;
insert into ☃ (☢) values (1);
insert into ☃ (☢) values (2);
explain select ☢ from ☃ where ☢=1;
drop table ☃;
# End of 4.1 tests
#
# Bug#15463: EXPLAIN SELECT..INTO hangs the client (QB, command line)
#
select 3 into @v1;
explain select 3 into @v1;
#
# Bug #32241: memory corruption due to large index map in 'Range checked for
# each record'
#
CREATE TABLE t1(c INT);
INSERT INTO t1 VALUES (),();
CREATE TABLE t2 (b INT,
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b));
INSERT INTO t2 VALUES (),(),();
# We only need to make sure that there is no buffer overrun and the index map
# is displayed correctly
--replace_column 1 X 2 X 3 X 4 X 5 X 6 X 7 X 8 X 9 X
EXPLAIN SELECT 1 FROM
(SELECT 1 FROM t2,t1 WHERE b < c GROUP BY 1 LIMIT 1) AS d2;
DROP TABLE t2;
DROP TABLE t1;
--echo End of 5.0 tests.
--enable_metadata
explain select 1;
--disable_metadata
--echo End of 5.2 tests.
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