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Diffstat (limited to 'mysql-test/main/explain_non_select.test')
| -rw-r--r-- | mysql-test/main/explain_non_select.test | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/mysql-test/main/explain_non_select.test b/mysql-test/main/explain_non_select.test new file mode 100644 index 00000000..e861955b --- /dev/null +++ b/mysql-test/main/explain_non_select.test @@ -0,0 +1,299 @@ +# +# MariaDB tests for EXPLAIN UPDATE/DELETE. +# +--source include/have_partition.inc + +--disable_warnings +drop table if exists t0, t1; +--enable_warnings + +create table t0 (a int) engine=myisam; +insert into t0 values (1),(2),(3),(4),(5),(6),(7),(8); + +--echo # +--echo # Tests for single-table DELETE +--echo # + +explain select * from t0 where a=3; +explain delete from t0 where a=3; + +--echo # DELETE without WHERE is a special case: +explain delete from t0; + +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; + +--echo # This should use an index, possible_keys=NULL because there is no WHERE +explain delete from t1 order by a limit 2; + +--echo # This should use range, possible_keys={a,b} +explain delete from t1 where a<20 and b < 10; + +--echo # This should use ALL + filesort +explain delete from t1 order by a+1 limit 2; + +--echo # This should use range + using filesort +explain delete from t1 where a<20 order by b limit 2; + +--echo # Try some subqueries: +explain delete from t1 where a < (select max(a) from t0); +explain delete from t1 where a < (select max(a) from t0 where a < t1.b); + +--echo # +--echo # Tests for multi-table DELETE +--echo # +explain delete t1 from t0, t1 where t0.a = t1.a; +drop table t0, t1; + +--echo # ################################################################### +--echo # ## EXPLAIN UPDATE tests +--echo # ################################################################### +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; + +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; +explain update t1 set a=a+1 where a=3 and a=4; + +--echo # 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; + +--echo # This should use range, possible_keys={a,b} +explain update t1 set filler='fooo' where a<20 and b < 10; + +--echo # This should use ALL + filesort +explain update t1 set filler='fooo' order by a+1 limit 2; + +--echo # This should use range + using filesort +explain update t1 set filler='fooo' where a<20 order by b limit 2; + +--echo # Try some subqueries: +explain update t1 set filler='fooo' where a < (select max(a) from t0); +explain update t1 set filler='fooo' where a < (select max(a) from t0 where a < t1.b); + +--echo # +--echo # Tests for multi-table UPDATE +--echo # +explain update t0, t1 set t1.a=t1.a+1 where t0.a = t1.a; + + +drop table t0, t1; + +--echo # +--echo # Try DELETE ... RETURNING ... +--echo # +create table t0 (a int); +insert into t0 values (1),(2),(3),(4); +explain delete from t0 where a=1 returning a; +explain delete from t0 returning a; +drop table t0; + +--echo # +--echo # MDEV-5070 - EXPLAIN INSERT ... SELECT crashes on 10.0-base-explain-slowquerylog +--echo # +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; +explain replace into t1 select * from t0; + +drop table t0, t1; + +--echo # +--echo # MDEV-5067: Valgrind warnings (Invalid read) in QPF_table_access::print_explain +--echo # +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); + +DROP TABLE t1; + +--echo # +--echo # MDEV-5093, MDEV-5094: EXPLAIN PARTITIONS and EXPLAIN EXTENDED do not +--echo # work for EXPLAIN UPDATE. +--echo # +create table t1 (i int); +explain partitions update t1 set i = 3; + +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); +explain partitions delete from t2 where a in (3,4); + +explain extended update t2 set b=3 where a in (3,4); +explain extended delete from t2 where a in (3,4); + +drop table t1,t2; + +--echo # +--echo # Check the special case where partition pruning removed all partitions +--echo # + +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); + +explain partitions delete from t1 where a in (32,33); + +explain partitions update t1 set b=12345 where a in (32,33); + +drop table t1; + +--echo # +--echo # Tests for EXPLAIN INSERT ... VALUES +--echo # +create table t1 (a int, key(a)); +explain insert into t1 values (1),(2),(3); +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)); + +drop table t1,t2; + +--echo # +--echo # MDEV-5122: "Commands out of sync", "Malformed packet" or client hang up on unique key violation +--echo # +drop table if exists t1; + +--disable_warnings +drop function if exists f1; +--enable_warnings + +create table t1 (a int, unique(a)); + +delimiter |; +create function f1(x int) + returns int +begin + insert into t1 values(x),(x); + return 10; +end| +delimiter ;| + +--error ER_DUP_ENTRY +select f1(100); +select 'OK'; + +drop function f1; +drop table t1; + +--echo # +--echo # MDEV-7038: Assertion `status_var.memory_used == 0' failed in THD::~THD() +--echo # on disconnect after executing EXPLAIN for multi-table UPDATE +--echo # + +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; +DROP TABLE t1; +DROP VIEW v1; + +--echo # +--echo # MDEV-8299: MyISAM or Aria table gets corrupted after EXPLAIN INSERT and INSERT +--echo # +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; +INSERT INTO t1 (i) VALUES (300); +CHECK TABLE t1; + +DROP TABLE t1, t2; + +--echo # +--echo # MDEV-8321: Assertion `! is_set()' failed in Diagnostics_area::set_eof_status on EXPLAIN INSERT ... UNION +--echo # + +CREATE TABLE t1 (a INT); +CREATE TABLE t2 (b INT); +CREATE TABLE t3 (c INT); + +# Data is not necessary, tables can be empty as well +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; +drop table t1,t2,t3; + +--echo # +--echo # MDEV-6223: Assertion `! is_set()' fails in Diagnostics_area::set_eof_status on EXPLAIN INSERT executed as a PS +--echo # +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; +drop table t1,t2; + +--echo # +--echo # MDEV-31181: EXPLAIN EXTENDED for single-table DELETE with IN predicand +--echo # + +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); + +let $q1= +delete from t1 where a in (select pk from t2); + +eval explain extended $q1; +eval $q1; +select * from t1; + +let $q2= +delete from t1 where a in (select a from t3); + +eval explain extended $q2; +eval $q2; +select * from t1; + +drop table t1,t2,t3; + +--echo # +--echo # MDEV-31224: EXPLAIN EXTENDED for multi-table update of system table +--echo # + +CREATE TABLE t1 (a INT); +INSERT INTO t1 VALUES (1),(2); + +CREATE TABLE t2 (b INT) ENGINE=MyISAM; +INSERT INTO t2 VALUES (3); + +let $q= +UPDATE t1, t2 SET b = 4 WHERE a IN (6,2); + +eval EXPLAIN EXTENDED $q; +eval $q; +SELECT * from t2; + +DROP TABLE t1, t2; + +--echo # End of 10.4 tests |