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Diffstat (limited to 'mysql-test/main/explain_non_select.result')
| -rw-r--r-- | mysql-test/main/explain_non_select.result | 329 |
1 files changed, 329 insertions, 0 deletions
diff --git a/mysql-test/main/explain_non_select.result b/mysql-test/main/explain_non_select.result new file mode 100644 index 00000000..3101887a --- /dev/null +++ b/mysql-test/main/explain_non_select.result @@ -0,0 +1,329 @@ +drop table if exists t0, t1; +create table t0 (a int) engine=myisam; +insert into t0 values (1),(2),(3),(4),(5),(6),(7),(8); +# +# Tests for single-table DELETE +# +explain select * from t0 where a=3; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 ALL NULL NULL NULL NULL 8 Using where +explain delete from t0 where a=3; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 ALL NULL NULL NULL NULL 8 Using where +# DELETE without WHERE is a special case: +explain delete from t0; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL 8 Deleting all rows +create table t1 (a int, b int, filler char(100), key(a), key(b)); +insert into t1 +select A.a+10*B.a + 10*C.a, A.a+10*B.a + 10*C.a, 'filler' +from t0 A, t0 B, t0 C; +# This should use an index, possible_keys=NULL because there is no WHERE +explain delete from t1 order by a limit 2; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index NULL a 5 NULL 2 +# This should use range, possible_keys={a,b} +explain delete from t1 where a<20 and b < 10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 range a,b a 5 NULL 1 Using where +# This should use ALL + filesort +explain delete from t1 order by a+1 limit 2; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 512 Using filesort +# This should use range + using filesort +explain delete from t1 where a<20 order by b limit 2; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 range a a 5 NULL 1 Using where; Using filesort +# Try some subqueries: +explain delete from t1 where a < (select max(a) from t0); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 range a a 5 NULL 1 Using where +2 SUBQUERY t0 ALL NULL NULL NULL NULL 8 +explain delete from t1 where a < (select max(a) from t0 where a < t1.b); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 512 Using where +2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 8 Using where +# +# Tests for multi-table DELETE +# +explain delete t1 from t0, t1 where t0.a = t1.a; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 ALL NULL NULL NULL NULL 8 Using where +1 SIMPLE t1 ref a a 5 test.t0.a 4 +drop table t0, t1; +# ################################################################### +# ## EXPLAIN UPDATE tests +# ################################################################### +create table t0 (a int) engine=myisam; +insert into t0 values (1),(2),(3),(4),(5),(6),(7),(8); +explain update t0 set a=3 where a=4; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 ALL NULL NULL NULL NULL 8 Using where +create table t1 (a int, b int, filler char(100), key(a), key(b)); +insert into t1 +select A.a+10*B.a + 10*C.a, A.a+10*B.a + 10*C.a, 'filler' +from t0 A, t0 B, t0 C; +explain update t1 set a=a+1 where 3>4; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +explain update t1 set a=a+1 where a=3 and a=4; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +# This should use an index, possible_keys=NULL because there is no WHERE +explain update t1 set a=a+1 order by a limit 2; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 512 Using filesort +# This should use range, possible_keys={a,b} +explain update t1 set filler='fooo' where a<20 and b < 10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 range a,b a 5 NULL 1 Using where +# This should use ALL + filesort +explain update t1 set filler='fooo' order by a+1 limit 2; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 512 Using filesort +# This should use range + using filesort +explain update t1 set filler='fooo' where a<20 order by b limit 2; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 range a a 5 NULL 1 Using where; Using filesort +# Try some subqueries: +explain update t1 set filler='fooo' where a < (select max(a) from t0); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 range a a 5 NULL 1 Using where +2 SUBQUERY t0 ALL NULL NULL NULL NULL 8 +explain update t1 set filler='fooo' where a < (select max(a) from t0 where a < t1.b); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 512 Using where +2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 8 Using where +# +# Tests for multi-table UPDATE +# +explain update t0, t1 set t1.a=t1.a+1 where t0.a = t1.a; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 ALL NULL NULL NULL NULL 8 Using where +1 SIMPLE t1 ref a a 5 test.t0.a 4 +drop table t0, t1; +# +# Try DELETE ... RETURNING ... +# +create table t0 (a int); +insert into t0 values (1),(2),(3),(4); +explain delete from t0 where a=1 returning a; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 ALL NULL NULL NULL NULL 4 Using where +explain delete from t0 returning a; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 ALL NULL NULL NULL NULL 4 +drop table t0; +# +# MDEV-5070 - EXPLAIN INSERT ... SELECT crashes on 10.0-base-explain-slowquerylog +# +create table t0 (a int); +insert into t0 values (1),(2),(3),(4),(5),(6),(7),(8); +create table t1 (a int); +explain insert into t1 select * from t0; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 ALL NULL NULL NULL NULL 8 +explain replace into t1 select * from t0; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 ALL NULL NULL NULL NULL 8 +drop table t0, t1; +# +# MDEV-5067: Valgrind warnings (Invalid read) in QPF_table_access::print_explain +# +CREATE TABLE t1 (i INT) ENGINE=MyISAM; +INSERT INTO t1 VALUES (7),(0),(9); +SELECT * FROM t1 INNER JOIN ( SELECT DISTINCT * FROM t1 ) AS sq ON (sq.i = t1.i); +i i +7 7 +0 0 +9 9 +DROP TABLE t1; +# +# MDEV-5093, MDEV-5094: EXPLAIN PARTITIONS and EXPLAIN EXTENDED do not +# work for EXPLAIN UPDATE. +# +create table t1 (i int); +explain partitions update t1 set i = 3; +id select_type table partitions type possible_keys key key_len ref rows Extra +1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 0 +create table t2 (a int, b int) partition by hash(a) partitions 5; +insert into t2 values (0,0),(1,1),(2,2),(3,3),(4,4); +explain partitions update t2 set b=3 where a in (3,4); +id select_type table partitions type possible_keys key key_len ref rows Extra +1 SIMPLE t2 p3,p4 ALL NULL NULL NULL NULL 2 Using where +explain partitions delete from t2 where a in (3,4); +id select_type table partitions type possible_keys key key_len ref rows Extra +1 SIMPLE t2 p3,p4 ALL NULL NULL NULL NULL 2 Using where +explain extended update t2 set b=3 where a in (3,4); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where +Warnings: +Note 1003 update `test`.`t2` set `test`.`t2`.`b` = 3 where `test`.`t2`.`a` in (3,4) +explain extended delete from t2 where a in (3,4); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where +Warnings: +Note 1003 delete from `test`.`t2` where `test`.`t2`.`a` in (3,4) +drop table t1,t2; +# +# Check the special case where partition pruning removed all partitions +# +create table t1 (a int, b int) +partition by range (a) ( +partition p0 values less than (10), +partition p1 values less than (20), +partition p2 values less than (30) +); +insert into t1 values (9,9), (19,19), (29,29); +explain partitions select * from t1 where a in (32,33); +id select_type table partitions type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +explain partitions delete from t1 where a in (32,33); +id select_type table partitions type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No matching rows after partition pruning +explain partitions update t1 set b=12345 where a in (32,33); +id select_type table partitions type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No matching rows after partition pruning +drop table t1; +# +# Tests for EXPLAIN INSERT ... VALUES +# +create table t1 (a int, key(a)); +explain insert into t1 values (1),(2),(3); +id select_type table type possible_keys key key_len ref rows Extra +1 INSERT t1 ALL NULL NULL NULL NULL NULL NULL +insert into t1 values (1),(2),(3); +create table t2 (a int, b int); +explain insert into t2 values +(10, 1+(select max(a) from t1)), +(11, 1+(select max(a+1) from t1)); +id select_type table type possible_keys key key_len ref rows Extra +1 INSERT t2 ALL NULL NULL NULL NULL NULL NULL +3 SUBQUERY t1 index NULL a 5 NULL 3 Using index +2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +drop table t1,t2; +# +# MDEV-5122: "Commands out of sync", "Malformed packet" or client hang up on unique key violation +# +drop table if exists t1; +Warnings: +Note 1051 Unknown table 'test.t1' +drop function if exists f1; +create table t1 (a int, unique(a)); +create function f1(x int) +returns int +begin +insert into t1 values(x),(x); +return 10; +end| +select f1(100); +ERROR 23000: Duplicate entry '100' for key 'a' +select 'OK'; +OK +OK +drop function f1; +drop table t1; +# +# MDEV-7038: Assertion `status_var.memory_used == 0' failed in THD::~THD() +# on disconnect after executing EXPLAIN for multi-table UPDATE +# +CREATE TABLE t1 (a INT); +CREATE VIEW v1 AS SELECT * FROM t1; +INSERT INTO t1 VALUES (1),(2); +EXPLAIN UPDATE v1, mysql.user SET v1.a = v1.a + 1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 2 +1 SIMPLE global_priv index NULL PRIMARY 1149 NULL 5 Using index +DROP TABLE t1; +DROP VIEW v1; +# +# MDEV-8299: MyISAM or Aria table gets corrupted after EXPLAIN INSERT and INSERT +# +CREATE TABLE t1 (pk INT NOT NULL AUTO_INCREMENT PRIMARY KEY, i INT, KEY(i)) ENGINE=MyISAM; +INSERT INTO t1 (i) VALUES (100),(200); +CREATE TABLE t2 (j INT) ENGINE=MyISAM; +INSERT INTO t2 VALUES (10),(20); +EXPLAIN INSERT INTO t1 (i) SELECT j FROM t2; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 2 +INSERT INTO t1 (i) VALUES (300); +CHECK TABLE t1; +Table Op Msg_type Msg_text +test.t1 check status OK +DROP TABLE t1, t2; +# +# MDEV-8321: Assertion `! is_set()' failed in Diagnostics_area::set_eof_status on EXPLAIN INSERT ... UNION +# +CREATE TABLE t1 (a INT); +CREATE TABLE t2 (b INT); +CREATE TABLE t3 (c INT); +INSERT INTO t1 VALUES (1),(2); +INSERT INTO t2 VALUES (3),(4); +INSERT INTO t3 VALUES (5),(6); +EXPLAIN INSERT INTO t1 SELECT * FROM t2 UNION SELECT * FROM t3; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 +2 UNION t3 ALL NULL NULL NULL NULL 2 +NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL +drop table t1,t2,t3; +# +# MDEV-6223: Assertion `! is_set()' fails in Diagnostics_area::set_eof_status on EXPLAIN INSERT executed as a PS +# +CREATE TABLE t1 (a INT) ENGINE = MyISAM; +CREATE TABLE t2 (b INT) ENGINE = MyISAM; +INSERT INTO t2 VALUES (1),(2); +PREPARE stmt FROM 'EXPLAIN INSERT INTO t1 SELECT * FROM t2'; +EXECUTE stmt; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 2 +drop table t1,t2; +# +# MDEV-31181: EXPLAIN EXTENDED for single-table DELETE with IN predicand +# +create table t1 (a int); +insert into t1 values (3), (7), (1), (3), (4); +create table t2 (pk int primary key); +insert into t2 values (3), (5), (1); +create table t3 (a int, key(a)); +insert into t3 values (7), (5), (7), (3); +explain extended delete from t1 where a in (select pk from t2); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 5 100.00 Using where +2 DEPENDENT SUBQUERY t2 unique_subquery PRIMARY PRIMARY 4 func 1 100.00 Using index +Warnings: +Note 1003 /* select#1 */ delete from `test`.`t1` where <in_optimizer>(`test`.`t1`.`a`,<exists>(<primary_index_lookup>(<cache>(`test`.`t1`.`a`) in t2 on PRIMARY))) +delete from t1 where a in (select pk from t2); +select * from t1; +a +7 +4 +explain extended delete from t1 where a in (select a from t3); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 Using where +2 DEPENDENT SUBQUERY t3 index_subquery a a 5 func 2 100.00 Using index +Warnings: +Note 1003 /* select#1 */ delete from `test`.`t1` where <in_optimizer>(`test`.`t1`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in t3 on a))) +delete from t1 where a in (select a from t3); +select * from t1; +a +4 +drop table t1,t2,t3; +# +# MDEV-31224: EXPLAIN EXTENDED for multi-table update of system table +# +CREATE TABLE t1 (a INT); +INSERT INTO t1 VALUES (1),(2); +CREATE TABLE t2 (b INT) ENGINE=MyISAM; +INSERT INTO t2 VALUES (3); +EXPLAIN EXTENDED UPDATE t1, t2 SET b = 4 WHERE a IN (6,2); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t2 system NULL NULL NULL NULL 1 100.00 +1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Using where +Warnings: +Note 1003 update `test`.`t1` set `test`.`t2`.`b` = 4 where `test`.`t1`.`a` in (6,2) +UPDATE t1, t2 SET b = 4 WHERE a IN (6,2); +SELECT * from t2; +b +4 +DROP TABLE t1, t2; +# End of 10.4 tests |