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author | Michael Widenius <monty@mariadb.org> | 2018-03-09 14:05:35 +0200 |
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committer | Monty <monty@mariadb.org> | 2018-03-29 13:59:44 +0300 |
commit | a7abddeffa6a760ce948c2dfb007cdf3f1a369d5 (patch) | |
tree | 70eb743fa965a17380bbc0ac88ae79ca1075b896 /mysql-test/main/explain.test | |
parent | ab1941266c59a19703a74b5593cf3f508a5752d7 (diff) | |
download | mariadb-git-a7abddeffa6a760ce948c2dfb007cdf3f1a369d5.tar.gz |
Create 'main' test directory and move 't' and 'r' there
Diffstat (limited to 'mysql-test/main/explain.test')
-rw-r--r-- | mysql-test/main/explain.test | 335 |
1 files changed, 335 insertions, 0 deletions
diff --git a/mysql-test/main/explain.test b/mysql-test/main/explain.test new file mode 100644 index 00000000000..d5be354c852 --- /dev/null +++ b/mysql-test/main/explain.test @@ -0,0 +1,335 @@ +# +# Test of different EXPLAINs + +--disable_warnings +drop table if exists t1; +--enable_warnings +create table t1 (id int not null, str char(10), unique(str)); +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 1176 +explain select * from t1 use key (str,str,foo) where str="foo"; +--error 1176 +explain select * from t1 ignore key (str,str,foo) where str="foo"; +drop table t1; + +explain select 1; + +create table t1 (a int not null); +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 +# +set names koi8r; +create table таб (кол0 int, кол1 int, key инд0 (кол0), key инд01 (кол0,кол1)); +insert into таб (кол0) values (1); +insert into таб (кол0) values (2); +explain select кол0 from таб where кол0=1; +drop table таб; +set names latin1; + +# 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#22331: Wrong WHERE in EXPLAIN EXTENDED when all expressions were +# optimized away. +# +create table t1(f1 int, f2 int); +insert into t1 values (1,1); +create view v1 as select * from t1 where f1=1; +explain extended select * from v1 where f2=1; +explain extended select * from t1 where 0; +explain extended select * from t1 where 1; +explain extended select * from t1 having 0; +explain extended select * from t1 having 1; +drop view v1; +drop table t1; + +# +# 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; + +# +# Bug #34773: query with explain extended and derived table / other table +# crashes server +# + +CREATE TABLE t1(a INT); +CREATE TABLE t2(a INT); +INSERT INTO t1 VALUES (1),(2); +INSERT INTO t2 VALUES (1),(2); + +EXPLAIN EXTENDED SELECT 1 + FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1; + +EXPLAIN EXTENDED SELECT 1 + FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1; + +prepare s1 from +'EXPLAIN EXTENDED SELECT 1 + FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1'; +execute s1; + +prepare s1 from +'EXPLAIN EXTENDED SELECT 1 + FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1'; +execute s1; +execute s1; + +DROP TABLE t1,t2; + + +# +# Bug #43354: Use key hint can crash server in explain extended query +# + +CREATE TABLE t1 (a INT PRIMARY KEY); + +--error ER_KEY_DOES_NOT_EXITS +EXPLAIN EXTENDED SELECT COUNT(a) FROM t1 USE KEY(a); + +DROP TABLE t1; + +# +# Bug#45989 memory leak after explain encounters an error in the query +# +CREATE TABLE t1(a LONGTEXT); +INSERT INTO t1 VALUES (repeat('a',@@global.max_allowed_packet)); +INSERT INTO t1 VALUES (repeat('b',@@global.max_allowed_packet)); +--error ER_BAD_FIELD_ERROR +EXPLAIN SELECT DISTINCT 1 FROM t1, + (SELECT DISTINCTROW a AS away FROM t1 GROUP BY a WITH ROLLUP) as d1 + WHERE t1.a = d1.a; +DROP TABLE t1; + +--echo # +--echo # Bug#48295: +--echo # explain extended crash with subquery and ONLY_FULL_GROUP_BY sql_mode +--echo # + +CREATE TABLE t1 (f1 INT not null); + +SELECT @@session.sql_mode INTO @old_sql_mode; +SET SESSION sql_mode='ONLY_FULL_GROUP_BY'; + +# EXPLAIN EXTENDED (with subselect). used to crash. should give NOTICE. +# Before moving max/min optimization to optimize phase this statement +# generated error, but as far as original query do not contain aggregate +# function user should not see error +# --error ER_MIX_OF_GROUP_FUNC_AND_FIELDS +EXPLAIN EXTENDED SELECT 1 FROM t1 + WHERE f1 > ALL( SELECT t.f1 FROM t1,t1 AS t ); + +SET SESSION sql_mode=@old_sql_mode; + +DROP TABLE t1; + +--echo End of 5.0 tests. + +--echo # +--echo # Bug#37870: Usage of uninitialized value caused failed assertion. +--echo # +create table t1 (dt datetime not null, t time not null); +create table t2 (dt datetime not null); +insert into t1 values ('2001-01-01 1:1:1', '1:1:1'), +('2001-01-01 1:1:1', '1:1:1'); +insert into t2 values ('2001-01-01 1:1:1'), ('2001-01-01 1:1:1'); +SET @save_join_cache_level=@@join_cache_level; +SET join_cache_level=0; +flush tables; +EXPLAIN SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN (SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.dt IS NULL ); +flush tables; +SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN (SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.dt IS NULL ); +flush tables; +EXPLAIN SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN ( SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.t < '2005-11-13 7:41:31' ); +flush tables; +SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN ( SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.t < '2005-11-13 7:41:31' ); +SET join_cache_level=@save_join_cache_level; +drop tables t1, t2; + +--echo # +--echo # Bug#47669: Query showed by EXPLAIN EXTENDED gives different result from original query +--echo # + +CREATE TABLE t1 (c int); +INSERT INTO t1 VALUES (NULL); +CREATE TABLE t2 (d int); +INSERT INTO t2 VALUES (NULL), (0); +EXPLAIN EXTENDED SELECT (SELECT 1 FROM t2 WHERE d = c) FROM t1; +DROP TABLE t1, t2; + +--echo # +--echo # Bug#30302: Tables that were optimized away are printed in the +--echo # EXPLAIN EXTENDED warning. +--echo # +create table t1(f1 int); +create table t2(f2 int); +insert into t1 values(1); +insert into t2 values(1),(2); +explain extended select * from t1 where f1=1; +explain extended select * from t1 join t2 on f1=f2 where f1=1; +drop table t1,t2; + +--echo # +--echo # Bug #48419: another explain crash.. +--echo # +CREATE TABLE t1 (a INT); +CREATE TABLE t2 (b BLOB, KEY b(b(100))); +INSERT INTO t2 VALUES ('1'), ('2'), ('3'); + +FLUSH TABLES; + +EXPLAIN SELECT 1 FROM t1 WHERE a = (SELECT 1 FROM t1 t JOIN t2 WHERE b <= 1 AND t.a); + +DROP TABLE t1, t2; + +--echo # +--echo # Bug #48573: difference of index selection between rpm binary and +--echo # .tar.gz, windows vs linux.. +--echo # + +CREATE TABLE t1(c1 INT, c2 INT, c4 INT, c5 INT, KEY(c2, c5), KEY(c2, c4, c5)); +INSERT INTO t1 VALUES(4, 1, 1, 1); +INSERT INTO t1 VALUES(3, 1, 1, 1); +INSERT INTO t1 VALUES(2, 1, 1, 1); +INSERT INTO t1 VALUES(1, 1, 1, 1); + +EXPLAIN SELECT c1 FROM t1 WHERE c2 = 1 AND c4 = 1 AND c5 = 1; + +DROP TABLE t1; + +--echo # +--echo # Bug#56814 Explain + subselect + fulltext crashes server +--echo # + +CREATE TABLE t1(f1 VARCHAR(6) NOT NULL, +FULLTEXT KEY(f1),UNIQUE(f1)); +INSERT INTO t1 VALUES ('test'); + +EXPLAIN SELECT 1 FROM t1 +WHERE 1 > ALL((SELECT t1.f1 FROM t1 JOIN t1 a ON (MATCH(t1.f1) AGAINST ("")) +WHERE t1.f1 GROUP BY t1.f1)); + +PREPARE stmt FROM +'EXPLAIN SELECT 1 FROM t1 + WHERE 1 > ALL((SELECT t1.f1 FROM t1 RIGHT OUTER JOIN t1 a + ON (MATCH(t1.f1) AGAINST ("")) + WHERE t1.f1 GROUP BY t1.f1))'; + +EXECUTE stmt; +EXECUTE stmt; + +DEALLOCATE PREPARE stmt; + +PREPARE stmt FROM +'EXPLAIN SELECT 1 FROM t1 + WHERE 1 > ALL((SELECT t1.f1 FROM t1 JOIN t1 a + ON (MATCH(t1.f1) AGAINST ("")) + WHERE t1.f1 GROUP BY t1.f1))'; + +EXECUTE stmt; +EXECUTE stmt; + +DEALLOCATE PREPARE stmt; + +DROP TABLE t1; + +--echo End of 5.1 tests. + +--echo # +--echo # Bug#11829785 EXPLAIN EXTENDED CRASH WITH RIGHT OUTER JOIN, SUBQUERIES +--echo # + +CREATE TABLE t1(a INT); + +INSERT INTO t1 VALUES (0), (0); + +PREPARE s FROM +'EXPLAIN EXTENDED +SELECT SUBSTRING(1, (SELECT 1 FROM t1 a1 RIGHT OUTER JOIN t1 ON 0)) AS d +FROM t1 WHERE 0 > ANY (SELECT @a FROM t1)'; + +--error ER_SUBQUERY_NO_1_ROW +EXECUTE s; + +DEALLOCATE PREPARE s; +DROP TABLE t1; + +--echo # +--echo # Bug#776295: EXPLAIN EXTENDED with always false multiple equality +--echo # in the WHERE condition of a derived table +--echo # + +CREATE TABLE t1 (a int) ; + +CREATE TABLE t2 (a int) ; +INSERT INTO t2 VALUES (8); + +set @tmp_optimizer_switch=@@optimizer_switch; +set optimizer_switch='derived_merge=off,derived_with_keys=off'; +EXPLAIN EXTENDED +SELECT * FROM ( SELECT t1.a FROM t1,t2 WHERE t2.a = t1.a ) AS t; +set optimizer_switch=@tmp_optimizer_switch; + +DROP TABLE t1,t2; + +--echo # +--echo # MDEV-7215: EXPLAIN REPLACE produces an error: +--echo # Column count doesn't match value count +--echo # +create table t1 (a int); +insert into t1 values (1); +create table t2 (b int, c int); + +replace into t2 select 100, (select a from t1); +explain replace into t2 select 100, (select a from t1); +#analyze replace into t2 select 100, (select a from t1); + +drop table t1, t2; + +--echo # End of 10.1 tests |