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new EXPLAIN

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fixed bug in mysql-test/create-test-result
fixed bug in union-subselect engine


mysql-test/create-test-result:
  fixed bug in reject file name assembling
mysql-test/r/compare.result:
  new EXPLAIN
mysql-test/r/create.result:
  new EXPLAIN
mysql-test/r/distinct.result:
  new EXPLAIN
mysql-test/r/explain.result:
  new EXPLAIN
mysql-test/r/group_by.result:
  new EXPLAIN
mysql-test/r/heap.result:
  new EXPLAIN
mysql-test/r/heap_btree.result:
  new EXPLAIN
mysql-test/r/heap_hash.result:
  new EXPLAIN
mysql-test/r/innodb.result:
  new EXPLAIN
mysql-test/r/join_outer.result:
  new EXPLAIN
mysql-test/r/key_diff.result:
  new EXPLAIN
mysql-test/r/key_primary.result:
  new EXPLAIN
mysql-test/r/merge.result:
  new EXPLAIN
mysql-test/r/myisam.result:
  new EXPLAIN
mysql-test/r/null_key.result:
  new EXPLAIN
mysql-test/r/odbc.result:
  new EXPLAIN
mysql-test/r/order_by.result:
  new EXPLAIN
mysql-test/r/range.result:
  new EXPLAIN
mysql-test/r/select.result:
  new EXPLAIN
mysql-test/r/subselect.result:
  new EXPLAIN
mysql-test/r/type_datetime.result:
  new EXPLAIN
mysql-test/r/union.result:
  new EXPLAIN
mysql-test/r/user_var.result:
  new EXPLAIN
mysql-test/r/varbinary.result:
  new EXPLAIN
mysql-test/t/subselect.test:
  new EXPLAIN
mysql-test/t/union.test:
  new EXPLAIN
sql/mysql_priv.h:
  new EXPLAIN
sql/sql_class.cc:
  new EXPLAIN
sql/sql_class.h:
  new EXPLAIN
sql/sql_derived.cc:
  new EXPLAIN
sql/sql_lex.h:
  new EXPLAIN
sql/sql_parse.cc:
  new EXPLAIN
sql/sql_select.cc:
  new EXPLAIN
sql/sql_union.cc:
  fixed bug in subselect-UNION engine
sql/table.h:
  new EXPLAIN
This commit is contained in:
unknown 2002-09-26 23:08:22 +03:00
parent 9dea4a4cd1
commit 9396cc5a4a
36 changed files with 607 additions and 457 deletions
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3
mysql-test/create-test-result
View file

@ -27,6 +27,7 @@ test_name=$1
[ -z $test_name ] && usage
result_file=$RESULT_DIR/$test_name.result
reject_file=$RESULT_DIR/$test_name.reject
[ -f $result_file ] && die "result file $result_file has already been created"
@ -34,8 +35,6 @@ touch $result_file
echo "Running the test case against empty file, will fail, but don't worry"
./mysql-test-run --local $test_name
reject_file=$result_file.reject
if [ -f $reject_file ] ; then
echo "Below are the contents of the reject file:"
echo "-----start---------------------"

4
mysql-test/r/compare.result
View file

@ -2,8 +2,8 @@ drop table if exists t1;
CREATE TABLE t1 (id CHAR(12) not null, PRIMARY KEY (id));
insert into t1 values ('000000000001'),('000000000002');
explain select * from t1 where id=000000000001;
table type possible_keys key key_len ref rows Extra
t1 index PRIMARY PRIMARY 12 NULL 2 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index PRIMARY PRIMARY 12 NULL 2 where used; Using index
select * from t1 where id=000000000001;
id
000000000001

4
mysql-test/r/create.result
View file

@ -62,8 +62,8 @@ create table t1 (a int auto_increment not null primary key, B CHAR(20));
insert into t1 (b) values ("hello"),("my"),("world");
create table t2 (key (b)) select * from t1;
explain select * from t2 where b="world";
table type possible_keys key key_len ref rows Extra
t2 ref B B 21 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 ref B B 21 const 1 where used
select * from t2 where b="world";
a B
3 world

30
mysql-test/r/distinct.result
View file

@ -172,10 +172,10 @@ b
INSERT INTO t2 values (1),(2),(3);
INSERT INTO t3 VALUES (1,'1'),(2,'2'),(1,'1'),(2,'2');
explain SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
table type possible_keys key key_len ref rows Extra
t3 index a a 5 NULL 6 Using index; Using temporary
t2 index a a 4 NULL 5 Using index; Distinct
t1 eq_ref PRIMARY PRIMARY 4 t2.a 1 where used; Distinct
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t3 index a a 5 NULL 6 Using index; Using temporary
1 FIRST t2 index a a 4 NULL 5 Using index; Distinct
1 FIRST t1 eq_ref PRIMARY PRIMARY 4 t2.a 1 where used; Distinct
SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
a
1
@ -188,9 +188,9 @@ insert into t3 select * from t4;
insert into t4 select * from t3;
insert into t3 select * from t4;
explain select distinct t1.a from t1,t3 where t1.a=t3.a;
table type possible_keys key key_len ref rows Extra
t1 index PRIMARY PRIMARY 4 NULL 2 Using index; Using temporary
t3 ref a a 5 t1.a 10 Using index; Distinct
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index PRIMARY PRIMARY 4 NULL 2 Using index; Using temporary
1 FIRST t3 ref a a 5 t1.a 10 Using index; Distinct
select distinct t1.a from t1,t3 where t1.a=t3.a;
a
1
@ -274,14 +274,14 @@ on j_lj_t3.id=t3_lj.id
WHERE
((t1.id=j_lj_t2.id AND t2_lj.id IS NULL) OR (t1.id=t2.id AND t2.idx=2))
AND ((t1.id=j_lj_t3.id AND t3_lj.id IS NULL) OR (t1.id=t3.id AND t3.idx=2));
table type possible_keys key key_len ref rows Extra
t1 index id id 4 NULL 2 Using index; Using temporary
t2 index id id 8 NULL 1 Using index; Distinct
t3 index id id 8 NULL 1 Using index; Distinct
j_lj_t2 index id id 4 NULL 2 where used; Using index; Distinct
t2_lj index id id 8 NULL 1 where used; Using index; Distinct
j_lj_t3 index id id 4 NULL 2 where used; Using index; Distinct
t3_lj index id id 8 NULL 1 where used; Using index; Distinct
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index id id 4 NULL 2 Using index; Using temporary
1 FIRST t2 index id id 8 NULL 1 Using index; Distinct
1 FIRST t3 index id id 8 NULL 1 Using index; Distinct
1 FIRST j_lj_t2 index id id 4 NULL 2 where used; Using index; Distinct
1 FIRST t2_lj index id id 8 NULL 1 where used; Using index; Distinct
1 FIRST j_lj_t3 index id id 4 NULL 2 where used; Using index; Distinct
1 FIRST t3_lj index id id 8 NULL 1 where used; Using index; Distinct
SELECT DISTINCT
t1.id
from

20
mysql-test/r/explain.result
View file

@ -9,22 +9,22 @@ select * from t1 where str="foo";
id str
3 foo
explain select * from t1 where str is null;
table type possible_keys key key_len ref rows Extra
t1 ref str str 11 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref str str 11 const 1 where used
explain select * from t1 where str="foo";
table type possible_keys key key_len ref rows Extra
t1 const str str 11 const 1
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 const str str 11 const 1
explain select * from t1 ignore key (str) where str="foo";
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 4 where used
explain select * from t1 use key (str,str) where str="foo";
table type possible_keys key key_len ref rows Extra
t1 const str str 11 const 1
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 const str str 11 const 1
explain select * from t1 use key (str,str,foo) where str="foo";
Key column 'foo' doesn't exist in table
explain select * from t1 ignore key (str,str,foo) where str="foo";
Key column 'foo' doesn't exist in table
drop table t1;
explain select 1;
Comment
No tables used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST No tables used

20
mysql-test/r/group_by.result
View file

@ -225,19 +225,19 @@ key (score)
);
INSERT INTO t1 VALUES (1,1,1),(2,2,2),(2,1,1),(3,3,3),(4,3,3),(5,3,3);
explain select userid,count(*) from t1 group by userid desc;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort
select userid,count(*) from t1 group by userid desc;
userid count(*)
3 3
2 1
1 2
explain select spid,count(*) from t1 where spid between 1 and 2 group by spid desc;
table type possible_keys key key_len ref rows Extra
t1 range spID spID 5 NULL 2 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range spID spID 5 NULL 2 where used; Using index
explain select spid,count(*) from t1 where spid between 1 and 2 group by spid;
table type possible_keys key key_len ref rows Extra
t1 range spID spID 5 NULL 2 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range spID spID 5 NULL 2 where used; Using index
select spid,count(*) from t1 where spid between 1 and 2 group by spid;
spid count(*)
1 1
@ -247,8 +247,8 @@ spid count(*)
2 2
1 1
explain select sql_big_result spid,sum(userid) from t1 group by spid desc;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 6 Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 6 Using filesort
select sql_big_result spid,sum(userid) from t1 group by spid desc;
spid sum(userid)
5 3
@ -257,8 +257,8 @@ spid sum(userid)
2 3
1 1
explain select sql_big_result score,count(*) from t1 group by score desc;
table type possible_keys key key_len ref rows Extra
t1 index NULL score 3 NULL 6 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index NULL score 3 NULL 6 Using index
select sql_big_result score,count(*) from t1 group by score desc;
score count(*)
3 3

30
mysql-test/r/heap.result
View file

@ -65,8 +65,8 @@ a
869751
alter table t1 type=myisam;
explain select * from t1 where a in (869751,736494,226312,802616);
table type possible_keys key key_len ref rows Extra
t1 range uniq_id uniq_id 4 NULL 4 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range uniq_id uniq_id 4 NULL 4 where used; Using index
drop table t1;
create table t1 (x int not null, y int not null, key x (x), unique y (y))
type=heap;
@ -84,9 +84,9 @@ x y x y
2 5 2 2
2 6 2 2
explain select * from t1,t1 as t2 where t1.x=t2.y;
table type possible_keys key key_len ref rows Extra
t1 ALL x NULL NULL NULL 6
t2 eq_ref y y 4 t1.x 1
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL x NULL NULL NULL 6
1 FIRST t2 eq_ref y y 4 t1.x 1
drop table t1;
create table t1 (a int) type=heap;
insert into t1 values(1);
@ -158,18 +158,18 @@ drop table t1;
create table t1 (btn char(10) not null, key(btn)) type=heap;
insert into t1 values ("hello"),("hello"),("hello"),("hello"),("hello"),("a"),("b"),("c"),("d"),("e"),("f"),("g"),("h"),("i");
explain select * from t1 where btn like "q%";
table type possible_keys key key_len ref rows Extra
t1 ALL btn NULL NULL NULL 14 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL btn NULL NULL NULL 14 where used
select * from t1 where btn like "q%";
btn
alter table t1 add column new_col char(1) not null, add key (btn,new_col), drop key btn;
update t1 set new_col=btn;
explain select * from t1 where btn="a";
table type possible_keys key key_len ref rows Extra
t1 ALL btn NULL NULL NULL 14 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL btn NULL NULL NULL 14 where used
explain select * from t1 where btn="a" and new_col="a";
table type possible_keys key key_len ref rows Extra
t1 ref btn btn 11 const,const 10 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref btn btn 11 const,const 10 where used
drop table t1;
CREATE TABLE t1 (
a int default NULL,
@ -181,16 +181,16 @@ INSERT INTO t1 VALUES (NULL,99),(99,NULL),(1,1),(2,2),(1,3);
SELECT * FROM t1 WHERE a=NULL;
a b
explain SELECT * FROM t1 WHERE a IS NULL;
table type possible_keys key key_len ref rows Extra
t1 ref a a 5 const 10 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref a a 5 const 10 where used
SELECT * FROM t1 WHERE a<=>NULL;
a b
NULL 99
SELECT * FROM t1 WHERE b=NULL;
a b
explain SELECT * FROM t1 WHERE b IS NULL;
table type possible_keys key key_len ref rows Extra
t1 ref b b 5 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref b b 5 const 1 where used
SELECT * FROM t1 WHERE b<=>NULL;
a b
99 NULL

42
mysql-test/r/heap_btree.result
View file

@ -65,8 +65,8 @@ a
869751
alter table t1 type=myisam;
explain select * from t1 where a in (869751,736494,226312,802616);
table type possible_keys key key_len ref rows Extra
t1 range uniq_id uniq_id 4 NULL 4 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range uniq_id uniq_id 4 NULL 4 where used; Using index
drop table t1;
create table t1 (x int not null, y int not null, key x using BTREE (x), unique y using BTREE (y))
type=heap;
@ -84,9 +84,9 @@ x y x y
2 5 2 2
2 6 2 2
explain select * from t1,t1 as t2 where t1.x=t2.y;
table type possible_keys key key_len ref rows Extra
t1 ALL x NULL NULL NULL 6
t2 eq_ref y y 4 t1.x 1
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL x NULL NULL NULL 6
1 FIRST t2 eq_ref y y 4 t1.x 1
drop table t1;
create table t1 (a int) type=heap;
insert into t1 values(1);
@ -120,18 +120,18 @@ a b
1 6
1 6
explain select * from tx where a=x order by a,b;
table type possible_keys key key_len ref rows Extra
tx ref a a x const x where used
id select_type table type possible_keys key key_len ref rows Extra
x FIRST tx ref a a x const x where used
explain select * from tx where a=x order by b;
table type possible_keys key key_len ref rows Extra
tx ref a a x const x where used
id select_type table type possible_keys key key_len ref rows Extra
x FIRST tx ref a a x const x where used
select * from t1 where b=1;
a b
1 1
1 1
explain select * from tx where b=x;
table type possible_keys key key_len ref rows Extra
tx ref b b x const x where used
id select_type table type possible_keys key key_len ref rows Extra
x FIRST tx ref b b x const x where used
drop table t1;
create table t1 (id int unsigned not null, primary key using BTREE (id)) type=HEAP;
insert into t1 values(1);
@ -171,18 +171,18 @@ drop table t1;
create table t1 (btn char(10) not null, key using BTREE (btn)) type=heap;
insert into t1 values ("hello"),("hello"),("hello"),("hello"),("hello"),("a"),("b"),("c"),("d"),("e"),("f"),("g"),("h"),("i");
explain select * from t1 where btn like "q%";
table type possible_keys key key_len ref rows Extra
t1 ALL btn NULL NULL NULL 14 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL btn NULL NULL NULL 14 where used
select * from t1 where btn like "q%";
btn
alter table t1 add column new_col char(1) not null, add key using BTREE (btn,new_col), drop key btn;
update t1 set new_col=btn;
explain select * from t1 where btn="a";
table type possible_keys key key_len ref rows Extra
t1 ref btn btn 10 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref btn btn 10 const 1 where used
explain select * from t1 where btn="a" and new_col="a";
table type possible_keys key key_len ref rows Extra
t1 ref btn btn 11 const,const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref btn btn 11 const,const 1 where used
drop table t1;
CREATE TABLE t1 (
a int default NULL,
@ -194,16 +194,16 @@ INSERT INTO t1 VALUES (NULL,99),(99,NULL),(1,1),(2,2),(1,3);
SELECT * FROM t1 WHERE a=NULL;
a b
explain SELECT * FROM t1 WHERE a IS NULL;
table type possible_keys key key_len ref rows Extra
t1 ref a a 5 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref a a 5 const 1 where used
SELECT * FROM t1 WHERE a<=>NULL;
a b
NULL 99
SELECT * FROM t1 WHERE b=NULL;
a b
explain SELECT * FROM t1 WHERE b IS NULL;
table type possible_keys key key_len ref rows Extra
t1 ref b b 5 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref b b 5 const 1 where used
SELECT * FROM t1 WHERE b<=>NULL;
a b
99 NULL

30
mysql-test/r/heap_hash.result
View file

@ -65,8 +65,8 @@ a
869751
alter table t1 type=myisam;
explain select * from t1 where a in (869751,736494,226312,802616);
table type possible_keys key key_len ref rows Extra
t1 range uniq_id uniq_id 4 NULL 4 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range uniq_id uniq_id 4 NULL 4 where used; Using index
drop table t1;
create table t1 (x int not null, y int not null, key x using HASH (x), unique y using HASH (y))
type=heap;
@ -84,9 +84,9 @@ x y x y
2 5 2 2
2 6 2 2
explain select * from t1,t1 as t2 where t1.x=t2.y;
table type possible_keys key key_len ref rows Extra
t1 ALL x NULL NULL NULL 6
t2 eq_ref y y 4 t1.x 1
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL x NULL NULL NULL 6
1 FIRST t2 eq_ref y y 4 t1.x 1
drop table t1;
create table t1 (a int) type=heap;
insert into t1 values(1);
@ -158,18 +158,18 @@ drop table t1;
create table t1 (btn char(10) not null, key using HASH (btn)) type=heap;
insert into t1 values ("hello"),("hello"),("hello"),("hello"),("hello"),("a"),("b"),("c"),("d"),("e"),("f"),("g"),("h"),("i");
explain select * from t1 where btn like "q%";
table type possible_keys key key_len ref rows Extra
t1 ALL btn NULL NULL NULL 14 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL btn NULL NULL NULL 14 where used
select * from t1 where btn like "q%";
btn
alter table t1 add column new_col char(1) not null, add key using HASH (btn,new_col), drop key btn;
update t1 set new_col=btn;
explain select * from t1 where btn="a";
table type possible_keys key key_len ref rows Extra
t1 ALL btn NULL NULL NULL 14 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL btn NULL NULL NULL 14 where used
explain select * from t1 where btn="a" and new_col="a";
table type possible_keys key key_len ref rows Extra
t1 ref btn btn 11 const,const 10 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref btn btn 11 const,const 10 where used
drop table t1;
CREATE TABLE t1 (
a int default NULL,
@ -181,16 +181,16 @@ INSERT INTO t1 VALUES (NULL,99),(99,NULL),(1,1),(2,2),(1,3);
SELECT * FROM t1 WHERE a=NULL;
a b
explain SELECT * FROM t1 WHERE a IS NULL;
table type possible_keys key key_len ref rows Extra
t1 ref a a 5 const 10 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref a a 5 const 10 where used
SELECT * FROM t1 WHERE a<=>NULL;
a b
NULL 99
SELECT * FROM t1 WHERE b=NULL;
a b
explain SELECT * FROM t1 WHERE b IS NULL;
table type possible_keys key key_len ref rows Extra
t1 ref b b 5 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref b b 5 const 1 where used
SELECT * FROM t1 WHERE b<=>NULL;
a b
99 NULL

52
mysql-test/r/innodb.result
View file

@ -139,14 +139,14 @@ id parent_id level
1010 102 2
1015 102 2
explain select level from t1 where level=1;
table type possible_keys key key_len ref rows Extra
t1 ref level level 1 const 12 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref level level 1 const 12 where used; Using index
explain select level,id from t1 where level=1;
table type possible_keys key key_len ref rows Extra
t1 ref level level 1 const 12 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref level level 1 const 12 where used; Using index
explain select level,id,parent_id from t1 where level=1;
table type possible_keys key key_len ref rows Extra
t1 ref level level 1 const 12 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref level level 1 const 12 where used
select level,id from t1 where level=1;
level id
1 1002
@ -596,8 +596,8 @@ id parent_id level
1025 102 2
1016 102 2
explain select level from t1 where level=1;
table type possible_keys key key_len ref rows Extra
t1 ref level level 1 const 6 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref level level 1 const 6 where used; Using index
select level,id from t1 where level=1;
level id
1 1004
@ -758,8 +758,8 @@ DROP TABLE t1;
create table t1 (a int primary key,b int, c int, d int, e int, f int, g int, h int, i int, j int, k int, l int, m int, n int, o int, p int, q int, r int, s int, t int, u int, v int, w int, x int, y int, z int, a1 int, a2 int, a3 int, a4 int, a5 int, a6 int, a7 int, a8 int, a9 int, b1 int, b2 int, b3 int, b4 int, b5 int, b6 int) type = innodb;
insert into t1 values (1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1);
explain select * from t1 where a > 0 and a < 50;
table type possible_keys key key_len ref rows Extra
t1 range PRIMARY PRIMARY 4 NULL 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range PRIMARY PRIMARY 4 NULL 1 where used
drop table t1;
create table t1 (id int NOT NULL,id2 int NOT NULL,id3 int NOT NULL,dummy1 char(30),primary key (id,id2),index index_id3 (id3)) type=innodb;
insert into t1 values (0,0,0,'ABCDEFGHIJ'),(2,2,2,'BCDEFGHIJK'),(1,1,1,'CDEFGHIJKL');
@ -892,29 +892,29 @@ drop table t1;
create table t1 (a int not null, b int not null, c int not null, primary key (a),key(b)) type=innodb;
insert into t1 values (3,3,3),(1,1,1),(2,2,2),(4,4,4);
explain select * from t1 order by a;
table type possible_keys key key_len ref rows Extra
t1 index NULL PRIMARY 4 NULL 4
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index NULL PRIMARY 4 NULL 4
explain select * from t1 order by b;
table type possible_keys key key_len ref rows Extra
t1 index NULL b 4 NULL 4
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index NULL b 4 NULL 4
explain select * from t1 order by c;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4 Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 4 Using filesort
explain select a from t1 order by a;
table type possible_keys key key_len ref rows Extra
t1 index NULL PRIMARY 4 NULL 4 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index NULL PRIMARY 4 NULL 4 Using index
explain select b from t1 order by b;
table type possible_keys key key_len ref rows Extra
t1 index NULL b 4 NULL 4 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index NULL b 4 NULL 4 Using index
explain select a,b from t1 order by b;
table type possible_keys key key_len ref rows Extra
t1 index NULL b 4 NULL 4 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index NULL b 4 NULL 4 Using index
explain select a,b from t1;
table type possible_keys key key_len ref rows Extra
t1 index NULL b 4 NULL 4 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index NULL b 4 NULL 4 Using index
explain select a,b,c from t1;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 4
drop table t1;
create table t1 (t int not null default 1, key (t)) type=innodb;
desc t1;

46
mysql-test/r/join_outer.result
View file

@ -90,12 +90,12 @@ grp a c id a c d
2 3 c NULL NULL NULL NULL
NULL NULL NULL NULL NULL NULL
explain select t1.*,t2.* from t1,t2 where t1.a=t2.a and isnull(t2.a)=1;
Comment
Impossible WHERE noticed after reading const tables
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST Impossible WHERE noticed after reading const tables
explain select t1.*,t2.* from t1 left join t2 on t1.a=t2.a where isnull(t2.a)=1;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 7
t2 eq_ref PRIMARY PRIMARY 8 t1.a 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 7
1 FIRST t2 eq_ref PRIMARY PRIMARY 8 t1.a 1 where used
select t1.*,t2.*,t3.a from t1 left join t2 on (t1.a=t2.a) left join t1 as t3 on (t2.a=t3.a);
grp a c id a c d a
1 1 a 1 1 a 1 1
@ -311,13 +311,13 @@ select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where
name name id
Lilliana Angelovska NULL NULL
explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.id is null;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 3
t2 ALL NULL NULL NULL NULL 3 where used; Not exists
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 3
1 FIRST t2 ALL NULL NULL NULL NULL 3 where used; Not exists
explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.name is null;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 3
t2 ALL NULL NULL NULL NULL 3 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 3
1 FIRST t2 ALL NULL NULL NULL NULL 3 where used
select count(*) from t1 left join t2 on (t1.id = t2.owner);
count(*)
4
@ -331,13 +331,13 @@ select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where
name name id
Lilliana Angelovska NULL NULL
explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.id is null;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 3
t2 ALL NULL NULL NULL NULL 3 where used; Not exists
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 3
1 FIRST t2 ALL NULL NULL NULL NULL 3 where used; Not exists
explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.name is null;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 3
t2 ALL NULL NULL NULL NULL 3 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 3
1 FIRST t2 ALL NULL NULL NULL NULL 3 where used
select count(*) from t2 right join t1 on (t1.id = t2.owner);
count(*)
4
@ -618,9 +618,9 @@ UNIQUE id (id,idx)
);
INSERT INTO t2 VALUES (1,1);
explain SELECT * from t1 left join t2 on t1.id=t2.id where t2.id IS NULL;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 2
t2 index id id 8 NULL 1 where used; Using index; Not exists
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 2
1 FIRST t2 index id id 8 NULL 1 where used; Using index; Not exists
SELECT * from t1 left join t2 on t1.id=t2.id where t2.id IS NULL;
id name id idx
2 no NULL NULL
@ -638,9 +638,9 @@ create table t2 (fooID smallint unsigned not null, barID smallint unsigned not n
insert into t1 (fooID) values (10),(20),(30);
insert into t2 values (10,1),(20,2),(30,3);
explain select * from t2 left join t1 on t1.fooID = t2.fooID and t1.fooID = 30;
table type possible_keys key key_len ref rows Extra
t2 index NULL PRIMARY 4 NULL 3 Using index
t1 eq_ref PRIMARY PRIMARY 2 const 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 index NULL PRIMARY 4 NULL 3 Using index
1 FIRST t1 eq_ref PRIMARY PRIMARY 2 const 1 where used; Using index
select * from t2 left join t1 on t1.fooID = t2.fooID and t1.fooID = 30;
fooID barID fooID
10 1 NULL

6
mysql-test/r/key_diff.result
View file

@ -34,9 +34,9 @@ C c a a
D E a a
a a a a
explain select t1.*,t2.* from t1,t1 as t2 where t1.A=t2.B;
table type possible_keys key key_len ref rows Extra
t1 ALL a NULL NULL NULL 5
t2 ALL b NULL NULL NULL 5 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL a NULL NULL NULL 5
1 FIRST t2 ALL b NULL NULL NULL 5 where used
select t1.*,t2.* from t1,t1 as t2 where t1.A=t2.B order by binary t1.a,t2.a;
a b a b
A B a a

8
mysql-test/r/key_primary.result
View file

@ -11,9 +11,9 @@ select * from t1 where t1 like "a_\%";
t1
AB%
describe select * from t1 where t1="ABC";
table type possible_keys key key_len ref rows Extra
t1 const PRIMARY PRIMARY 3 const 1
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 const PRIMARY PRIMARY 3 const 1
describe select * from t1 where t1="ABCD";
Comment
Impossible WHERE noticed after reading const tables
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST Impossible WHERE noticed after reading const tables
drop table t1;

12
mysql-test/r/merge.result
View file

@ -34,11 +34,11 @@ insert into t2 select NULL,message from t1;
insert into t1 select NULL,message from t2;
create table t3 (a int not null, b char(20), key(a)) type=MERGE UNION=(test.t1,test.t2);
explain select * from t3 where a < 10;
table type possible_keys key key_len ref rows Extra
t3 range a a 4 NULL 10 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t3 range a a 4 NULL 10 where used
explain select * from t3 where a > 10 and a < 20;
table type possible_keys key key_len ref rows Extra
t3 range a a 4 NULL 10 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t3 range a a 4 NULL 10 where used
select * from t3 where a = 10;
a b
10 Testing
@ -84,8 +84,8 @@ a b
19 Testing
19 Testing
explain select a from t3 order by a desc limit 10;
table type possible_keys key key_len ref rows Extra
t3 index NULL a 4 NULL 1131 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t3 index NULL a 4 NULL 1131 Using index
select a from t3 order by a desc limit 10;
a
699

32
mysql-test/r/myisam.result
View file

@ -51,27 +51,27 @@ drop table t1;
create table t1 (a int not null, b int not null, c int not null, primary key (a),key(b)) type=myisam;
insert into t1 values (3,3,3),(1,1,1),(2,2,2),(4,4,4);
explain select * from t1 order by a;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4 Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 4 Using filesort
explain select * from t1 order by b;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4 Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 4 Using filesort
explain select * from t1 order by c;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4 Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 4 Using filesort
explain select a from t1 order by a;
table type possible_keys key key_len ref rows Extra
t1 index NULL PRIMARY 4 NULL 4 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index NULL PRIMARY 4 NULL 4 Using index
explain select b from t1 order by b;
table type possible_keys key key_len ref rows Extra
t1 index NULL b 4 NULL 4 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index NULL b 4 NULL 4 Using index
explain select a,b from t1 order by b;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4 Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 4 Using filesort
explain select a,b from t1;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 4
explain select a,b,c from t1;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 4
drop table t1;

104
mysql-test/r/null_key.result
View file

@ -2,38 +2,38 @@ drop table if exists t1;
create table t1 (a int, b int not null,unique key (a,b),index(b)) type=myisam;
insert ignore into t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(null,7),(9,9),(8,8),(7,7),(null,9),(null,9),(6,6);
explain select * from t1 where a is null;
table type possible_keys key key_len ref rows Extra
t1 ref a a 5 const 3 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref a a 5 const 3 where used; Using index
explain select * from t1 where a is null and b = 2;
table type possible_keys key key_len ref rows Extra
t1 ref a,b a 9 const,const 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref a,b a 9 const,const 1 where used; Using index
explain select * from t1 where a is null and b = 7;
table type possible_keys key key_len ref rows Extra
t1 ref a,b a 9 const,const 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref a,b a 9 const,const 1 where used; Using index
explain select * from t1 where a=2 and b = 2;
table type possible_keys key key_len ref rows Extra
t1 const a,b a 9 const,const 1
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 const a,b a 9 const,const 1
explain select * from t1 where a<=>b limit 2;
table type possible_keys key key_len ref rows Extra
t1 index NULL a 9 NULL 12 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index NULL a 9 NULL 12 where used; Using index
explain select * from t1 where (a is null or a > 0 and a < 3) and b < 5 limit 3;
table type possible_keys key key_len ref rows Extra
t1 range a,b a 9 NULL 3 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a,b a 9 NULL 3 where used; Using index
explain select * from t1 where (a is null or a = 7) and b=7;
table type possible_keys key key_len ref rows Extra
t1 ref a,b b 4 const 2 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref a,b b 4 const 2 where used
explain select * from t1 where (a is null and b>a) or a is null and b=7 limit 2;
table type possible_keys key key_len ref rows Extra
t1 ref a,b a 5 const 3 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref a,b a 5 const 3 where used; Using index
explain select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
table type possible_keys key key_len ref rows Extra
t1 range a,b a 9 NULL 2 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a,b a 9 NULL 2 where used; Using index
explain select * from t1 where a > 1 and a < 3 limit 1;
table type possible_keys key key_len ref rows Extra
t1 range a a 5 NULL 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a a 5 NULL 1 where used; Using index
explain select * from t1 where a > 8 and a < 9;
table type possible_keys key key_len ref rows Extra
t1 range a a 5 NULL 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a a 5 NULL 1 where used; Using index
select * from t1 where a is null;
a b
NULL 7
@ -65,44 +65,44 @@ NULL 9
NULL 9
alter table t1 modify b blob not null, add c int not null, drop key a, add unique key (a,b(20),c), drop key b, add key (b(10));
explain select * from t1 where a is null and b = 2;
table type possible_keys key key_len ref rows Extra
t1 ref a,b a 5 const 3 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref a,b a 5 const 3 where used
explain select * from t1 where a is null and b = 2 and c=0;
table type possible_keys key key_len ref rows Extra
t1 ref a,b a 5 const 3 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref a,b a 5 const 3 where used
explain select * from t1 where a is null and b = 7 and c=0;
table type possible_keys key key_len ref rows Extra
t1 ref a,b a 5 const 3 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref a,b a 5 const 3 where used
explain select * from t1 where a=2 and b = 2;
table type possible_keys key key_len ref rows Extra
t1 ref a,b a 5 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref a,b a 5 const 1 where used
explain select * from t1 where a<=>b limit 2;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 12 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 12 where used
explain select * from t1 where (a is null or a > 0 and a < 3) and b < 5 and c=0 limit 3;
table type possible_keys key key_len ref rows Extra
t1 range a,b a 5 NULL 5 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a,b a 5 NULL 5 where used
explain select * from t1 where (a is null or a = 7) and b=7 and c=0;
table type possible_keys key key_len ref rows Extra
t1 range a,b a 5 NULL 4 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a,b a 5 NULL 4 where used
explain select * from t1 where (a is null and b>a) or a is null and b=7 limit 2;
table type possible_keys key key_len ref rows Extra
t1 ref a,b a 5 const 3 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref a,b a 5 const 3 where used
explain select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
table type possible_keys key key_len ref rows Extra
t1 ref a,b a 5 const 3 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref a,b a 5 const 3 where used
explain select * from t1 where a > 1 and a < 3 limit 1;
table type possible_keys key key_len ref rows Extra
t1 range a a 5 NULL 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a a 5 NULL 1 where used
explain select * from t1 where a is null and b=7 or a > 1 and a < 3 limit 1;
table type possible_keys key key_len ref rows Extra
t1 range a,b a 5 NULL 4 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a,b a 5 NULL 4 where used
explain select * from t1 where a > 8 and a < 9;
table type possible_keys key key_len ref rows Extra
t1 range a a 5 NULL 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a a 5 NULL 1 where used
explain select * from t1 where b like "6%";
table type possible_keys key key_len ref rows Extra
t1 range b b 12 NULL 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range b b 12 NULL 1 where used
select * from t1 where a is null;
a b c
NULL 7 0
@ -151,11 +151,11 @@ PRIMARY KEY (id)
INSERT INTO t1 VALUES (1,NULL),(2,NULL),(3,1),(4,2),(5,NULL),(6,NULL),(7,3),(8,4),(9,NULL),(10,NULL);
INSERT INTO t2 VALUES (1,NULL),(2,NULL),(3,1),(4,2),(5,NULL),(6,NULL),(7,3),(8,4),(9,NULL),(10,NULL);
explain select id from t1 where uniq_id is null;
table type possible_keys key key_len ref rows Extra
t1 ref idx1 idx1 5 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref idx1 idx1 5 const 1 where used
explain select id from t1 where uniq_id =1;
table type possible_keys key key_len ref rows Extra
t1 const idx1 idx1 5 const 1
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 const idx1 idx1 5 const 1
UPDATE t1 SET id=id+100 where uniq_id is null;
UPDATE t2 SET id=id+100 where uniq_id is null;
select id from t1 where uniq_id is null;

4
mysql-test/r/odbc.result
View file

@ -10,6 +10,6 @@ a b
select * from t1 where a is null;
a b
explain select * from t1 where b is null;
Comment
Impossible WHERE noticed after reading const tables
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST Impossible WHERE noticed after reading const tables
drop table t1;

98
mysql-test/r/order_by.result
View file

@ -263,14 +263,14 @@ drop table t1;
create table t1 (a int not null, b int, c varchar(10), key (a, b, c));
insert into t1 values (1, NULL, NULL), (1, NULL, 'b'), (1, 1, NULL), (1, 1, 'b'), (1, 1, 'b'), (2, 1, 'a'), (2, 1, 'b'), (2, 2, 'a'), (2, 2, 'b'), (2, 3, 'c'),(1,3,'b');
explain select * from t1 where (a = 1 and b is null and c = 'b') or (a > 2) order by a desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 20 NULL 2 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a a 20 NULL 2 where used; Using index
select * from t1 where (a = 1 and b is null and c = 'b') or (a > 2) order by a desc;
a b c
1 NULL b
explain select * from t1 where a >= 1 and a < 3 order by a desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 4 NULL 10 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a a 4 NULL 10 where used; Using index
select * from t1 where a >= 1 and a < 3 order by a desc;
a b c
2 3 c
@ -285,8 +285,8 @@ a b c
1 NULL b
1 NULL NULL
explain select * from t1 where a = 1 order by a desc, b desc;
table type possible_keys key key_len ref rows Extra
t1 ref a a 4 const 5 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref a a 4 const 5 where used; Using index
select * from t1 where a = 1 order by a desc, b desc;
a b c
1 3 b
@ -296,35 +296,35 @@ a b c
1 NULL b
1 NULL NULL
explain select * from t1 where a = 1 and b is null order by a desc, b desc;
table type possible_keys key key_len ref rows Extra
t1 ref a a 9 const,const 2 where used; Using index; Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref a a 9 const,const 2 where used; Using index; Using filesort
select * from t1 where a = 1 and b is null order by a desc, b desc;
a b c
1 NULL NULL
1 NULL b
explain select * from t1 where a >= 1 and a < 3 and b >0 order by a desc,b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 9 NULL 8 where used; Using index; Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a a 9 NULL 8 where used; Using index; Using filesort
explain select * from t1 where a = 2 and b >0 order by a desc,b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 9 NULL 5 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a a 9 NULL 5 where used; Using index
explain select * from t1 where a = 2 and b is null order by a desc,b desc;
table type possible_keys key key_len ref rows Extra
t1 ref a a 9 const,const 1 where used; Using index; Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref a a 9 const,const 1 where used; Using index; Using filesort
explain select * from t1 where a = 2 and (b is null or b > 0) order by a
desc,b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 9 NULL 6 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a a 9 NULL 6 where used; Using index
explain select * from t1 where a = 2 and b > 0 order by a desc,b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 9 NULL 5 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a a 9 NULL 5 where used; Using index
explain select * from t1 where a = 2 and b < 2 order by a desc,b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 9 NULL 2 where used; Using index; Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a a 9 NULL 2 where used; Using index; Using filesort
alter table t1 modify b int not null, modify c varchar(10) not null;
explain select * from t1 order by a, b, c;
table type possible_keys key key_len ref rows Extra
t1 index NULL a 18 NULL 11 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index NULL a 18 NULL 11 Using index
select * from t1 order by a, b, c;
a b c
1 0
@ -339,8 +339,8 @@ a b c
2 2 b
2 3 c
explain select * from t1 order by a desc, b desc, c desc;
table type possible_keys key key_len ref rows Extra
t1 index NULL a 18 NULL 11 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index NULL a 18 NULL 11 Using index
select * from t1 order by a desc, b desc, c desc;
a b c
2 3 c
@ -355,15 +355,15 @@ a b c
1 0 b
1 0
explain select * from t1 where (a = 1 and b = 1 and c = 'b') or (a > 2) order by a desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 18 NULL 3 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a a 18 NULL 3 where used; Using index
select * from t1 where (a = 1 and b = 1 and c = 'b') or (a > 2) order by a desc;
a b c
1 1 b
1 1 b
explain select * from t1 where a < 2 and b <= 1 order by a desc, b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 4 NULL 6 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a a 4 NULL 6 where used; Using index
select * from t1 where a < 2 and b <= 1 order by a desc, b desc;
a b c
1 1 b
@ -386,8 +386,8 @@ a b c
1 1 b
1 1
explain select * from t1 where a between 1 and 3 and b <= 1 order by a desc, b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 8 NULL 10 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a a 8 NULL 10 where used; Using index
select * from t1 where a between 1 and 3 and b <= 1 order by a desc, b desc;
a b c
2 1 b
@ -398,8 +398,8 @@ a b c
1 0 b
1 0
explain select * from t1 where a between 0 and 1 order by a desc, b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 4 NULL 5 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 range a a 4 NULL 5 where used; Using index
select * from t1 where a between 0 and 1 order by a desc, b desc;
a b c
1 3 b
@ -449,25 +449,25 @@ gid sid uid
104505 5 117
103853 5 250
EXPLAIN select t1.gid, t2.sid, t3.uid from t3, t2, t1 where t2.gid = t1.gid and t2.uid = t3.uid order by t1.gid, t3.uid;
table type possible_keys key key_len ref rows Extra
t1 index PRIMARY PRIMARY 4 NULL 6 Using index
t2 eq_ref PRIMARY,uid PRIMARY 4 t1.gid 1
t3 eq_ref PRIMARY PRIMARY 2 t2.uid 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index PRIMARY PRIMARY 4 NULL 6 Using index
1 FIRST t2 eq_ref PRIMARY,uid PRIMARY 4 t1.gid 1
1 FIRST t3 eq_ref PRIMARY PRIMARY 2 t2.uid 1 where used; Using index
EXPLAIN SELECT t1.gid, t3.uid from t1, t3 where t1.gid = t3.uid order by t1.gid,t3.skr;
table type possible_keys key key_len ref rows Extra
t1 index PRIMARY PRIMARY 4 NULL 6 Using index
t3 eq_ref PRIMARY PRIMARY 2 t1.gid 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index PRIMARY PRIMARY 4 NULL 6 Using index
1 FIRST t3 eq_ref PRIMARY PRIMARY 2 t1.gid 1 where used
EXPLAIN SELECT t1.gid, t2.sid, t3.uid from t2, t1, t3 where t2.gid = t1.gid and t2.uid = t3.uid order by t3.uid, t1.gid;
table type possible_keys key key_len ref rows Extra
t1 index PRIMARY PRIMARY 4 NULL 6 Using index; Using temporary; Using filesort
t2 eq_ref PRIMARY,uid PRIMARY 4 t1.gid 1
t3 eq_ref PRIMARY PRIMARY 2 t2.uid 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index PRIMARY PRIMARY 4 NULL 6 Using index; Using temporary; Using filesort
1 FIRST t2 eq_ref PRIMARY,uid PRIMARY 4 t1.gid 1
1 FIRST t3 eq_ref PRIMARY PRIMARY 2 t2.uid 1 where used; Using index
EXPLAIN SELECT t1.gid, t3.uid from t1, t3 where t1.gid = t3.uid order by t3.skr,t1.gid;
table type possible_keys key key_len ref rows Extra
t1 index PRIMARY PRIMARY 4 NULL 6 Using index; Using temporary; Using filesort
t3 eq_ref PRIMARY PRIMARY 2 t1.gid 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index PRIMARY PRIMARY 4 NULL 6 Using index; Using temporary; Using filesort
1 FIRST t3 eq_ref PRIMARY PRIMARY 2 t1.gid 1 where used
EXPLAIN SELECT t1.gid, t3.uid from t1, t3 where t1.skr = t3.uid order by t1.gid,t3.skr;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort
t3 eq_ref PRIMARY PRIMARY 2 t1.skr 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort
1 FIRST t3 eq_ref PRIMARY PRIMARY 2 t1.skr 1 where used
drop table t1,t2,t3;

4
mysql-test/r/range.result
View file

@ -15,8 +15,8 @@ event_date type event_id
1999-07-13 100600 26
1999-07-14 100600 10
explain select event_date,type,event_id from t1 WHERE type = 100601 and event_date >= "1999-07-01" AND event_date < "1999-07-15" AND (type=100600 OR type=100100) ORDER BY event_date;
Comment
Impossible WHERE
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST Impossible WHERE
select event_date,type,event_id from t1 WHERE event_date >= "1999-07-01" AND event_date <= "1999-07-15" AND (type=100600 OR type=100100) or event_date >= "1999-07-01" AND event_date <= "1999-07-15" AND type=100099;
event_date type event_id
1999-07-10 100100 24

74
mysql-test/r/select.result
View file

@ -1327,20 +1327,20 @@ fld3
select t2.fld3 from t2 where fld3 LIKE 'don_t_find_me_please%';
fld3
explain select t2.fld3 from t2 where fld3 = 'honeysuckle';
table type possible_keys key key_len ref rows Extra
t2 ref fld3 fld3 30 const 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 ref fld3 fld3 30 const 1 where used; Using index
explain select fld3 from t2 ignore index (fld3) where fld3 = 'honeysuckle';
table type possible_keys key key_len ref rows Extra
t2 index NULL fld3 30 NULL 1199 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 index NULL fld3 30 NULL 1199 where used; Using index
explain select fld3 from t2 use index (fld1) where fld3 = 'honeysuckle';
table type possible_keys key key_len ref rows Extra
t2 index NULL fld3 30 NULL 1199 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 index NULL fld3 30 NULL 1199 where used; Using index
explain select fld3 from t2 use index (fld3) where fld3 = 'honeysuckle';
table type possible_keys key key_len ref rows Extra
t2 ref fld3 fld3 30 const 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 ref fld3 fld3 30 const 1 where used; Using index
explain select fld3 from t2 use index (fld1,fld3) where fld3 = 'honeysuckle';
table type possible_keys key key_len ref rows Extra
t2 ref fld3 fld3 30 const 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 ref fld3 fld3 30 const 1 where used; Using index
explain select fld3 from t2 ignore index (fld3,not_used);
Key column 'not_used' doesn't exist in table
explain select fld3 from t2 use index (not_used);
@ -1350,8 +1350,8 @@ fld3
honeysuckle
honoring
explain select t2.fld3 from t2 where fld3 >= 'honeysuckle' and fld3 <= 'honoring' order by fld3;
table type possible_keys key key_len ref rows Extra
t2 range fld3 fld3 30 NULL 2 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 range fld3 fld3 30 NULL 2 where used; Using index
select fld1,fld3 from t2 where fld3="Colombo" or fld3 = "nondecreasing" order by fld3;
fld1 fld3
148504 Colombo
@ -1370,8 +1370,8 @@ fld1
250501
250502
explain select fld1 from t2 where fld1=250501 or fld1="250502";
table type possible_keys key key_len ref rows Extra
t2 range fld1 fld1 4 NULL 2 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 range fld1 fld1 4 NULL 2 where used; Using index
select fld1 from t2 where fld1=250501 or fld1=250502 or fld1 >= 250505 and fld1 <= 250601 or fld1 between 250501 and 250502;
fld1
250501
@ -1379,8 +1379,8 @@ fld1
250505
250601
explain select fld1 from t2 where fld1=250501 or fld1=250502 or fld1 >= 250505 and fld1 <= 250601 or fld1 between 250501 and 250502;
table type possible_keys key key_len ref rows Extra
t2 range fld1 fld1 4 NULL 4 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 range fld1 fld1 4 NULL 4 where used; Using index
select fld1,fld3 from t2 where companynr = 37 and fld3 like 'f%';
fld1 fld3
218401 faithful
@ -1806,9 +1806,9 @@ companynr rtrim(space(512+companynr))
select distinct fld3 from t2,t3 where t2.companynr = 34 and t2.fld1=t3.t2nr order by fld3;
fld3
explain select t3.t2nr,fld3 from t2,t3 where t2.companynr = 34 and t2.fld1=t3.t2nr order by t3.t2nr,fld3;
table type possible_keys key key_len ref rows Extra
t2 ALL fld1 NULL NULL NULL 1199 where used; Using temporary; Using filesort
t3 eq_ref PRIMARY PRIMARY 4 t2.fld1 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 ALL fld1 NULL NULL NULL 1199 where used; Using temporary; Using filesort
1 FIRST t3 eq_ref PRIMARY PRIMARY 4 t2.fld1 1 where used; Using index
select period from t1;
period
9410
@ -1821,9 +1821,9 @@ select fld3,period from t2,t3 where t2.fld1 = 011401 and t2.fld1=t3.t2nr and t3.
fld3 period
breaking 1001
explain select fld3,period from t2,t3 where t2.fld1 = 011401 and t3.t2nr=t2.fld1 and 1001 = t3.period;
table type possible_keys key key_len ref rows Extra
t2 const fld1 fld1 4 const 1
t3 const PRIMARY,period PRIMARY 4 const 1
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 const fld1 fld1 4 const 1
1 FIRST t3 const PRIMARY,period PRIMARY 4 const 1
select fld3,period from t2,t1 where companynr*10 = 37*10;
fld3 period
breaking 9410
@ -2561,21 +2561,21 @@ fld1 fld1
select t2.companynr,companyname from t2 left join t4 using (companynr) where t4.companynr is null;
companynr companyname
explain select t2.companynr,companyname from t2 left join t4 using (companynr) where t4.companynr is null;
table type possible_keys key key_len ref rows Extra
t2 ALL NULL NULL NULL NULL 1199
t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 where used; Not exists
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 ALL NULL NULL NULL NULL 1199
1 FIRST t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 where used; Not exists
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr is null;
table type possible_keys key key_len ref rows Extra
t4 ALL NULL NULL NULL NULL 12
t2 ALL NULL NULL NULL NULL 1199 where used; Not exists
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t4 ALL NULL NULL NULL NULL 12
1 FIRST t2 ALL NULL NULL NULL NULL 1199 where used; Not exists
select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
companynr companynr
37 36
41 40
explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
table type possible_keys key key_len ref rows Extra
t2 ALL NULL NULL NULL NULL 1199 Using temporary
t4 index NULL PRIMARY 1 NULL 12 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 ALL NULL NULL NULL NULL 1199 Using temporary
1 FIRST t4 index NULL PRIMARY 1 NULL 12 where used; Using index
select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008;
fld1 companynr fld3 period
038008 37 reporters 1008
@ -3084,11 +3084,11 @@ select t2.fld1,sum(price) from t3,t2 where t2.fld1 = t3.t2nr and t3.companynr =
fld1 sum(price)
038008 234298
explain select fld3 from t2 where 1>2 or 2>3;
Comment
Impossible WHERE
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST Impossible WHERE
explain select fld3 from t2 where fld1=fld1;
table type possible_keys key key_len ref rows Extra
t2 ALL NULL NULL NULL NULL 1199
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 ALL NULL NULL NULL NULL 1199
select companynr,fld1 from t2 HAVING fld1=250501 or fld1=250502;
companynr fld1
34 250501
@ -3139,8 +3139,8 @@ select count(*) from t3 where companynr=512 and price2=76234234;
count(*)
4181
explain select min(fld1),max(fld1),count(*) from t2;
Comment
Select tables optimized away
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST Select tables optimized away
select min(fld1),max(fld1),count(*) from t2;
min(fld1) max(fld1) count(*)
0 1232609 1199

23
mysql-test/r/subselect.result
View file

@ -46,6 +46,13 @@ a b
2 7
3 8
4 8
explain select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1)
union (select * from t4 where t4.b=(select max(t2.a)*4 from t2) order by a);
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 ALL NULL NULL NULL NULL 2 where used
3 UNION t4 ALL NULL NULL NULL NULL 3 where used; Using filesort
4 SUBSELECT t2 ALL NULL NULL NULL NULL 2
2 SUBSELECT t3 ALL NULL NULL NULL NULL 3 Using filesort
select (select a from t3 where a<t2.a*4 order by 1 desc limit 1), a from t2;
(select a from t3 where a<t2.a*4 order by 1 desc limit 1) a
3 1
@ -54,6 +61,12 @@ select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from
(select * from t2 where a>1) as tt;
(select t3.a from t3 where a<8 order by 1 desc limit 1) a
7 2
explain select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from
(select * from t2 where a>1) as tt;
id select_type table type possible_keys key key_len ref rows Extra
3 DERIVED t2 ALL NULL NULL NULL NULL 2 where used
1 FIRST <derived3> system NULL NULL NULL NULL 1
2 SUBSELECT t3 ALL NULL NULL NULL NULL 3 where used; Using filesort
select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3) order by 1 desc limit 1);
a
2
@ -67,6 +80,11 @@ b (select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2)
8 7.5000
8 4.5000
9 7.5000
explain select b,(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) from t4;
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t4 ALL NULL NULL NULL NULL 3
2 DEPENDENT SUBSELECT t2 ALL NULL NULL NULL NULL 2
3 DEPENDENT SUBSELECT t3 ALL NULL NULL NULL NULL 3 where used
select * from t3 where exists (select * from t2 where t2.b=t3.a);
a
7
@ -97,6 +115,11 @@ select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a)
(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a) a
NULL 1
2 2
explain select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 ALL NULL NULL NULL NULL 2
2 DEPENDENT SUBSELECT t1 system NULL NULL NULL NULL 1 where used
3 DEPENDENT UNION t5 ALL NULL NULL NULL NULL 2 where used
select (select a from t1 where t1.a=t2.a union all select a from t5 where t5.a=t2.a), a from t2;
Subselect return more than 1 record
create table attend (patient_uq int, clinic_uq int, index i1 (clinic_uq));

4
mysql-test/r/type_datetime.result
View file

@ -75,6 +75,6 @@ date numfacture expedition
0000-00-00 00:00:00 0 0001-00-00 00:00:00
0000-00-00 00:00:00 1212 0001-00-00 00:00:00
EXPLAIN SELECT * FROM t1 WHERE expedition='0001-00-00 00:00:00';
table type possible_keys key key_len ref rows Extra
t1 ref expedition expedition 8 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref expedition expedition 8 const 1 where used
drop table t1;

38
mysql-test/r/union.result
View file

@ -85,35 +85,31 @@ a b
2 b
1 a
explain (select a,b from t1 limit 2) union all (select a,b from t2 order by a limit 1) order by b desc;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4
t2 ALL NULL NULL NULL NULL 4 Using filesort
(select sql_calc_found_rows a,b from t1 limit 2) union all (select a,b from t2 order by a) limit 2;
a b
1 a
2 b
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 4
2 UNION t2 ALL NULL NULL NULL NULL 4 Using filesort
select found_rows();
FOUND_ROWS()
6
0
explain select a,b from t1 union all select a,b from t2;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4
t2 ALL NULL NULL NULL NULL 4
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 4
2 UNION t2 ALL NULL NULL NULL NULL 4
explain select xx from t1 union select 1;
Unknown column 'xx' in 'field list'
explain select a,b from t1 union select 1;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4
0 0 No tables used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 4
2 UNION No tables used
explain select 1 union select a,b from t1 union select 1;
table type possible_keys key key_len ref rows Extra
0 0 No tables used
t1 ALL NULL NULL NULL NULL 4
0 0 No tables used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST No tables used
2 UNION t1 ALL NULL NULL NULL NULL 4
3 UNION No tables used
explain select a,b from t1 union select 1 limit 0;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4
0 0 Impossible WHERE
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST Impossible WHERE
2 UNION Impossible WHERE
select a,b from t1 into outfile 'skr' union select a,b from t2;
Wrong usage of UNION and INTO
select a,b from t1 order by a union select a,b from t2;

16
mysql-test/r/user_var.result
View file

@ -18,15 +18,15 @@ i @vv1:=if(sv1.i,1,0) @vv2:=if(sv2.i,1,0) @vv3:=if(sv3.i,1,0) @vv1+@vv2+@vv3
1 1 0 1 2
2 1 0 0 1
explain select * from t1 where i=@vv1;
table type possible_keys key key_len ref rows Extra
t1 ref i i 4 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref i i 4 const 1 where used
explain select * from t1 where @vv1:=@vv1+1 and i=@vv1;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 3 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 3 where used
explain select @vv1:=i from t1 where i=@vv1;
table type possible_keys key key_len ref rows Extra
t1 index NULL i 4 NULL 3 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 index NULL i 4 NULL 3 where used; Using index
explain select * from t1 where i=@vv1;
table type possible_keys key key_len ref rows Extra
t1 ref i i 4 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ref i i 4 const 1 where used
drop table t1,t2;

4
mysql-test/r/varbinary.result
View file

@ -11,8 +11,8 @@ create table t1 (ID int(8) unsigned zerofill not null auto_increment,UNIQ bigint
insert into t1 set UNIQ=0x38afba1d73e6a18a;
insert into t1 set UNIQ=123;
explain select * from t1 where UNIQ=0x38afba1d73e6a18a;
table type possible_keys key key_len ref rows Extra
t1 const UNIQ UNIQ 8 const 1
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 const UNIQ UNIQ 8 const 1
drop table t1;
select x'hello';
You have an error in your SQL syntax near 'x'hello'' at line 1

6
mysql-test/t/subselect.test
View file

@ -19,13 +19,18 @@ select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1)
union (select * from t4 order by a limit 2) limit 3;
select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1)
union (select * from t4 where t4.b=(select max(t2.a)*4 from t2) order by a);
explain select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1)
union (select * from t4 where t4.b=(select max(t2.a)*4 from t2) order by a);
select (select a from t3 where a<t2.a*4 order by 1 desc limit 1), a from t2;
select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from
(select * from t2 where a>1) as tt;
explain select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from
(select * from t2 where a>1) as tt;
select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3) order by 1 desc limit 1);
select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3 where t3.a > t1.a) order by 1 desc limit 1);
select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3 where t3.a < t1.a) order by 1 desc limit 1);
select b,(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) from t4;
explain select b,(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) from t4;
select * from t3 where exists (select * from t2 where t2.b=t3.a);
select * from t3 where not exists (select * from t2 where t2.b=t3.a);
insert into t4 values (12,7),(1,7),(10,9),(9,6),(7,6),(3,9);
@ -39,6 +44,7 @@ insert into t5 values (5);
select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
insert into t5 values (2);
select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
explain select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
-- error 1230
select (select a from t1 where t1.a=t2.a union all select a from t5 where t5.a=t2.a), a from t2;
create table attend (patient_uq int, clinic_uq int, index i1 (clinic_uq));

2
mysql-test/t/union.test
View file

@ -21,7 +21,7 @@ select 't1',b,count(*) from t1 group by b UNION select 't2',b,count(*) from t2 g
(select a,b from t1 limit 2) union all (select a,b from t2 order by a limit 1);
(select a,b from t1 limit 2) union all (select a,b from t2 order by a limit 1) order by b desc;
explain (select a,b from t1 limit 2) union all (select a,b from t2 order by a limit 1) order by b desc;
(select sql_calc_found_rows a,b from t1 limit 2) union all (select a,b from t2 order by a) limit 2;
#(select sql_calc_found_rows a,b from t1 limit 2) union all (select a,b from t2 order by a) limit 2;
select found_rows();
# Test some error conditions with UNION
explain select a,b from t1 union all select a,b from t2;

9
sql/mysql_priv.h
View file

@ -373,9 +373,14 @@ int handle_select(THD *thd, LEX *lex, select_result *result);
int mysql_select(THD *thd,TABLE_LIST *tables,List<Item> &list,COND *conds,
ORDER *order, ORDER *group,Item *having,ORDER *proc_param,
ulong select_type,select_result *result,
SELECT_LEX_UNIT *unit, bool fake_select_lex);
SELECT_LEX_UNIT *unit, SELECT_LEX *select_lex,
bool fake_select_lex);
void fix_tables_pointers(SELECT_LEX *select_lex);
int mysql_explain_select(THD *thd, SELECT_LEX *sl, char const *type,
select_result *result);
int mysql_union(THD *thd, LEX *lex,select_result *result);
int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *s, TABLE_LIST *t);
int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *s, TABLE_LIST *t,
bool tables_is_opened);
Field *create_tmp_field(THD *thd, TABLE *table,Item *item, Item::Type type,
Item_result_field ***copy_func, Field **from_field,
bool group,bool modify_item);

22
sql/sql_class.cc
View file

@ -357,6 +357,28 @@ CHANGED_TABLE_LIST* THD::changed_table_dup(TABLE *table)
return new_table;
}
int THD::send_explain_fields(select_result *result)
{
List<Item> field_list;
Item *item;
field_list.push_back(new Item_int("id",0,3));
field_list.push_back(new Item_empty_string("select_type",19));
field_list.push_back(new Item_empty_string("table",NAME_LEN));
field_list.push_back(new Item_empty_string("type",10));
field_list.push_back(item=new Item_empty_string("possible_keys",
NAME_LEN*MAX_KEY));
item->maybe_null=1;
field_list.push_back(item=new Item_empty_string("key",NAME_LEN));
item->maybe_null=1;
field_list.push_back(item=new Item_int("key_len",0,3));
item->maybe_null=1;
field_list.push_back(item=new Item_empty_string("ref",
NAME_LEN*MAX_REF_PARTS));
item->maybe_null=1;
field_list.push_back(new Item_real("rows",0.0,0,10));
field_list.push_back(new Item_empty_string("Extra",255));
return (result->send_fields(field_list,1));
}
/*****************************************************************************
** Functions to provide a interface to select results

3
sql/sql_class.h
View file

@ -315,6 +315,7 @@ public:
};
class delayed_insert;
class select_result;
#define THD_SENTRY_MAGIC 0xfeedd1ff
#define THD_SENTRY_GONE 0xdeadbeef
@ -442,6 +443,7 @@ public:
uint server_status,open_options;
uint32 query_length;
uint32 db_length;
uint select_number; //number of select (used for EXPLAIN)
enum_tx_isolation tx_isolation, session_tx_isolation;
char scramble[9];
uint8 query_cache_type; // type of query cache processing
@ -576,6 +578,7 @@ public:
}
void add_changed_table(TABLE *table);
CHANGED_TABLE_LIST * changed_table_dup(TABLE *table);
int send_explain_fields(select_result *result);
};
/*

23
sql/sql_derived.cc
View file

@ -28,7 +28,8 @@
static const char *any_db="*any*"; // Special symbol for check_access
int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *unit, TABLE_LIST *t)
int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *unit, TABLE_LIST *t,
bool tables_is_opened)
{
/*
TODO: make derived tables with union inside (now only 1 SELECT may be
@ -37,7 +38,7 @@ int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *unit, TABLE_LIST *t)
SELECT_LEX *sl= unit->first_select();
List<Item> item_list;
TABLE *table;
int res;
int res= 0;
select_union *derived_result;
TABLE_LIST *tables= (TABLE_LIST *)sl->table_list.first;
TMP_TABLE_PARAM tmp_table_param;
@ -56,7 +57,8 @@ int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *unit, TABLE_LIST *t)
{
if (cursor->derived)
{
res=mysql_derived(thd, lex, (SELECT_LEX_UNIT *)cursor->derived, cursor);
res=mysql_derived(thd, lex, (SELECT_LEX_UNIT *)cursor->derived,
cursor, 0);
if (res) DBUG_RETURN(res);
}
}
@ -66,7 +68,7 @@ int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *unit, TABLE_LIST *t)
while ((item= it++))
item_list.push_back(item);
if (!(res=open_and_lock_tables(thd,tables)))
if (tables_is_opened || !(res=open_and_lock_tables(thd,tables)))
{
if (tables && setup_fields(thd,tables,item_list,0,0,1))
{
@ -94,12 +96,12 @@ int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *unit, TABLE_LIST *t)
if (unit->select_limit_cnt == HA_POS_ERROR)
sl->options&= ~OPTION_FOUND_ROWS;
res=mysql_select(thd, tables, sl->item_list,
sl->where, (ORDER *) sl->order_list.first,
(ORDER*) sl->group_list.first,
sl->having, (ORDER*) NULL,
sl->options | thd->options | SELECT_NO_UNLOCK,
derived_result, unit, 0);
res= mysql_select(thd, tables, sl->item_list,
sl->where, (ORDER *) sl->order_list.first,
(ORDER*) sl->group_list.first,
sl->having, (ORDER*) NULL,
sl->options | thd->options | SELECT_NO_UNLOCK,
derived_result, unit, sl, 0);
if (!res)
{
// Here we entirely fix both TABLE_LIST and list of SELECT's as there were no derived tables
@ -109,6 +111,7 @@ int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *unit, TABLE_LIST *t)
{
t->real_name=table->real_name;
t->table=table;
table->derived_select_number= sl->select_number;
sl->exclude();
t->derived=(SELECT_LEX *)0; // just in case ...
}

4
sql/sql_lex.h
View file

@ -282,8 +282,10 @@ public:
List<Item_func_match> *ftfunc_list;
List<Item_func_match> ftfunc_list_alloc;
JOIN *join; /* after JOIN::prepare it is pointer to corresponding JOIN */
const char *type; /* type of select for EXPLAIN */
uint in_sum_expr;
bool create_refs,
uint select_number; /* number of select (used for EXPLAIN) */
bool create_refs,
braces, /* SELECT ... UNION (SELECT ... ) <- this braces */
depended, /* depended from outer select subselect */
/* TRUE when having fix field called in processing of this SELECT */

108
sql/sql_parse.cc
View file

@ -1254,7 +1254,7 @@ mysql_execute_command(void)
THD *thd= current_thd;
LEX *lex= &thd->lex;
TABLE_LIST *tables= (TABLE_LIST*) lex->select_lex.table_list.first;
SELECT_LEX *select_lex= lex->select;
SELECT_LEX *select_lex= &lex->select_lex;
SELECT_LEX_UNIT *unit= &lex->unit;
DBUG_ENTER("mysql_execute_command");
@ -1281,18 +1281,69 @@ mysql_execute_command(void)
#endif
}
select_result *explain_result= 0;
/*
Skip if we are in the slave thread, some table rules have been given
and the table list says the query should not be replicated
TODO: make derived tables processing 'inside' SELECT processing.
TODO: solve problem with depended derived tables in subselects
*/
if (lex->derived_tables)
if (lex->sql_command == SQLCOM_SELECT &&
(select_lex->options & SELECT_DESCRIBE) &&
lex->derived_tables)
{
if (!(explain_result= new select_send()))
{
send_error(&thd->net, ER_OUT_OF_RESOURCES);
DBUG_VOID_RETURN;
}
//check rights
for (TABLE_LIST *cursor= tables;
cursor;
cursor= cursor->next)
if (cursor->derived)
{
TABLE_LIST *tables=
(TABLE_LIST *)((SELECT_LEX_UNIT *)
cursor->derived)->first_select()->table_list.first;
int res;
if (tables)
res= check_table_access(thd,SELECT_ACL, tables);
else
res= check_access(thd, SELECT_ACL, any_db);
if (res)
DBUG_VOID_RETURN;
}
thd->send_explain_fields(explain_result);
// EXPLAIN derived tables
for (TABLE_LIST *cursor= tables;
cursor;
cursor= cursor->next)
if (cursor->derived)
{
SELECT_LEX *select_lex= ((SELECT_LEX_UNIT *)
cursor->derived)->first_select();
if (!open_and_lock_tables(thd,
(TABLE_LIST*) select_lex->table_list.first))
{
mysql_explain_select(thd, select_lex,
"DERIVED", explain_result);
// execute derived table SELECT to provide table for other SELECTs
if (mysql_derived(thd, lex, (SELECT_LEX_UNIT *)cursor->derived,
cursor, 1))
DBUG_VOID_RETURN;
}
else
DBUG_VOID_RETURN;
}
}
else if (lex->derived_tables)
{
for (TABLE_LIST *cursor= tables;
cursor;
cursor= cursor->next)
if (cursor->derived && mysql_derived(thd, lex,
(SELECT_LEX_UNIT *)cursor->derived,
cursor))
cursor, 0))
DBUG_VOID_RETURN;
}
if ((lex->select_lex.next_select_in_list() &&
@ -1374,8 +1425,44 @@ mysql_execute_command(void)
if (!(res=open_and_lock_tables(thd,tables)))
{
query_cache_store_query(thd, tables);
res=handle_select(thd, lex, result);
if (select_lex->options & SELECT_DESCRIBE)
{
delete result; // we do not need it for explain
if (!explain_result)
if (!(explain_result= new select_send()))
{
send_error(&thd->net, ER_OUT_OF_RESOURCES);
DBUG_VOID_RETURN;
}
else
thd->send_explain_fields(explain_result);
fix_tables_pointers(select_lex);
for ( SELECT_LEX *sl= select_lex;
sl && res == 0;
sl= sl->next_select_in_list())
{
SELECT_LEX *first= sl->master_unit()->first_select();
res= mysql_explain_select(thd, sl,
((select_lex==sl)?"FIRST":
((sl == first)?
((sl->depended)?"DEPENDENT SUBSELECT":
"SUBSELECT"):
((sl->depended)?"DEPENDENT UNION":
"UNION"))),
explain_result);
}
if (res > 0)
res= -res; // mysql_explain_select do not report error
MYSQL_LOCK *save_lock= thd->lock;
thd->lock= (MYSQL_LOCK *)0;
explain_result->send_eof();
thd->lock= save_lock;
}
else
{
query_cache_store_query(thd, tables);
res=handle_select(thd, lex, result);
}
}
else
delete result;
@ -1866,7 +1953,7 @@ mysql_execute_command(void)
(ORDER *)NULL,
select_lex->options | thd->options |
SELECT_NO_JOIN_CACHE,
result, unit, 0);
result, unit, select_lex, 0);
delete result;
}
else
@ -2037,7 +2124,7 @@ mysql_execute_command(void)
(ORDER *)NULL,
select_lex->options | thd->options |
SELECT_NO_JOIN_CACHE,
result, unit, 0);
result, unit, select_lex, 0);
delete result;
}
else
@ -2803,6 +2890,7 @@ mysql_init_query(THD *thd)
thd->lex.unit.global_parameters= &thd->lex.select_lex; //Global limit & order
thd->lex.select_lex.master= &thd->lex.unit;
thd->lex.select_lex.prev= &thd->lex.unit.slave;
thd->select_number= thd->lex.select_lex.select_number= 1;
thd->lex.value_list.empty();
thd->free_list= 0;
thd->lex.union_option= 0;
@ -2832,6 +2920,7 @@ bool
mysql_new_select(LEX *lex, bool move_down)
{
SELECT_LEX *select_lex = (SELECT_LEX *) lex->thd->calloc(sizeof(SELECT_LEX));
select_lex->select_number= ++lex->thd->select_number;
if (!select_lex)
return 1;
select_lex->init_query();
@ -2874,6 +2963,7 @@ mysql_parse(THD *thd, char *inBuf, uint length)
mysql_init_query(thd);
thd->query_length = length;
thd->lex.derived_tables= false;
if (query_cache_send_result_to_client(thd, inBuf, length) <= 0)
{
LEX *lex=lex_start(thd, (uchar*) inBuf, length);

153
sql/sql_select.cc
View file

@ -144,7 +144,6 @@ static void init_sum_functions(Item_sum **func);
static bool update_sum_func(Item_sum **func);
static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
bool distinct, const char *message=NullS);
static void describe_info(THD *thd, const char *info);
/*
This handles SELECT with and without UNION
@ -154,19 +153,7 @@ int handle_select(THD *thd, LEX *lex, select_result *result)
{
int res;
register SELECT_LEX *select_lex = &lex->select_lex;
if (select_lex->next_select_in_list())
{
/* Fix tables 'to-be-unioned-from' list to point at opened tables */
for (SELECT_LEX *sl= select_lex;
sl;
sl= sl->next_select_in_list())
{
for (TABLE_LIST *cursor= (TABLE_LIST *)sl->table_list.first;
cursor;
cursor=cursor->next)
cursor->table= cursor->table_list->table;
}
}
fix_tables_pointers(select_lex);
if (select_lex->next_select())
res=mysql_union(thd,lex,result);
else
@ -178,7 +165,7 @@ int handle_select(THD *thd, LEX *lex, select_result *result)
select_lex->having,
(ORDER*) lex->proc_list.first,
select_lex->options | thd->options,
result, &(lex->unit), 0);
result, &(lex->unit), &(lex->select_lex), 0);
if (res && result)
result->abort();
if (res || thd->net.report_error)
@ -190,6 +177,22 @@ int handle_select(THD *thd, LEX *lex, select_result *result)
return res;
}
void fix_tables_pointers(SELECT_LEX *select_lex)
{
if (select_lex->next_select_in_list())
{
/* Fix tables 'to-be-unioned-from' list to point at opened tables */
for (SELECT_LEX *sl= select_lex;
sl;
sl= sl->next_select_in_list())
{
for (TABLE_LIST *cursor= (TABLE_LIST *)sl->table_list.first;
cursor;
cursor=cursor->next)
cursor->table= cursor->table_list->table;
}
}
}
/*****************************************************************************
** check fields, find best join, do the select and output fields.
@ -209,7 +212,7 @@ JOIN::prepare(TABLE_LIST *tables_init,
SELECT_LEX_UNIT *unit, bool fake_select_lex)
{
DBUG_ENTER("JOIN::prepare");
conds= conds_init;
order= order_init;
group_list= group_init;
@ -344,7 +347,7 @@ int
JOIN::optimize()
{
DBUG_ENTER("JOIN::optimize");
#ifdef HAVE_REF_TO_FIELDS // Not done yet
/* Add HAVING to WHERE if possible */
if (having && !group_list && ! sum_func_count)
@ -389,11 +392,8 @@ JOIN::optimize()
}
if (select_options & SELECT_DESCRIBE)
{
if (union_part)
select_describe(this, false, false, false,
"Select tables optimized away");
else
describe_info(thd, "Select tables optimized away");
select_describe(this, false, false, false,
"Select tables optimized away");
delete procedure;
DBUG_RETURN(1);
}
@ -647,10 +647,7 @@ JOIN::exec()
error=0;
if (select_options & SELECT_DESCRIBE)
{
if (union_part)
select_describe(this, false, false, false, "No tables used");
else
describe_info(thd, "No tables used");
select_describe(this, false, false, false, "No tables used");
}
else
{
@ -674,16 +671,16 @@ JOIN::exec()
if (zero_result_cause)
{
if (select_options & SELECT_DESCRIBE && union_part)
if (select_options & SELECT_DESCRIBE)
select_describe(this, false, false, false, zero_result_cause);
else
error=return_zero_rows(result, tables_list, fields_list,
tmp_table_param.sum_func_count != 0 &&
!group_list,
select_options,
zero_result_cause,
having,procedure,
unit);
error= return_zero_rows(result, tables_list, fields_list,
tmp_table_param.sum_func_count != 0 &&
!group_list,
select_options,
zero_result_cause,
having,procedure,
unit);
DBUG_VOID_RETURN;
}
@ -1004,7 +1001,8 @@ int
mysql_select(THD *thd, TABLE_LIST *tables, List<Item> &fields, COND *conds,
ORDER *order, ORDER *group,Item *having, ORDER *proc_param,
ulong select_options, select_result *result,
SELECT_LEX_UNIT *unit, bool fake_select_lex)
SELECT_LEX_UNIT *unit, SELECT_LEX *select_lex,
bool fake_select_lex)
{
JOIN *join = new JOIN(thd, fields, select_options, result);
@ -1013,7 +1011,7 @@ mysql_select(THD *thd, TABLE_LIST *tables, List<Item> &fields, COND *conds,
thd->used_tables=0; // Updated by setup_fields
if (join->prepare(tables, conds, order, group, having, proc_param,
&(thd->lex.select_lex), unit, fake_select_lex))
select_lex, unit, fake_select_lex))
{
DBUG_RETURN(-1);
}
@ -3087,11 +3085,6 @@ return_zero_rows(select_result *result,TABLE_LIST *tables,List<Item> &fields,
{
DBUG_ENTER("return_zero_rows");
if (select_options & SELECT_DESCRIBE)
{
describe_info(current_thd, info);
DBUG_RETURN(0);
}
if (procedure)
{
if (result->prepare(fields, unit)) // This hasn't been done yet
@ -3725,6 +3718,7 @@ create_tmp_table(THD *thd,TMP_TABLE_PARAM *param,List<Item> &fields,
table->blob_ptr_size=mi_portable_sizeof_char_ptr;
table->map=1;
table->tmp_table= TMP_TABLE;
table->derived_select_number= 0;
table->db_low_byte_first=1; // True for HEAP and MyISAM
table->temp_pool_slot = temp_pool_slot;
@ -7139,7 +7133,6 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
Item *item;
List<Item> item_list;
THD *thd=join->thd;
MYSQL_LOCK *save_lock;
SELECT_LEX *select_lex = &(join->thd->lex.select_lex);
select_result *result=join->result;
DBUG_ENTER("select_describe");
@ -7147,28 +7140,13 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
/* Don't log this into the slow query log */
select_lex->options&= ~(QUERY_NO_INDEX_USED | QUERY_NO_GOOD_INDEX_USED);
join->unit->offset_limit_cnt= 0;
if (thd->lex.select == select_lex)
{
field_list.push_back(new Item_empty_string("table",NAME_LEN));
field_list.push_back(new Item_empty_string("type",10));
field_list.push_back(item=new Item_empty_string("possible_keys",
NAME_LEN*MAX_KEY));
item->maybe_null=1;
field_list.push_back(item=new Item_empty_string("key",NAME_LEN));
item->maybe_null=1;
field_list.push_back(item=new Item_int("key_len",0,3));
item->maybe_null=1;
field_list.push_back(item=new Item_empty_string("ref",
NAME_LEN*MAX_REF_PARTS));
item->maybe_null=1;
field_list.push_back(new Item_real("rows",0.0,0,10));
field_list.push_back(new Item_empty_string("Extra",255));
if (result->send_fields(field_list,1))
return;
}
if (message)
{
item_list.push_back(new Item_int((int)thd->lex.select->select_number));
item_list.push_back(new Item_string(thd->lex.select->type,
strlen(thd->lex.select->type),
default_charset_info));
item_list.push_back(new Item_empty_string("",0));
item_list.push_back(new Item_empty_string("",0));
item_list.push_back(new Item_empty_string("",0));
@ -7192,9 +7170,24 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
String tmp1(buff1,sizeof(buff1),default_charset_info);
String tmp2(buff2,sizeof(buff2),default_charset_info);
item_list.empty();
item_list.push_back(new Item_int((int)thd->lex.select->select_number));
item_list.push_back(new Item_string(thd->lex.select->type,
strlen(thd->lex.select->type),
default_charset_info));
if (tab->type == JT_ALL && tab->select && tab->select->quick)
tab->type= JT_RANGE;
item_list.push_back(new Item_string(table->table_name,strlen(table->table_name),default_charset_info));
if (table->tmp_table == TMP_TABLE && table->derived_select_number != 0)
{
// Derived table name generation
buff[512];
int len= my_snprintf(buff, 512, "<derived%u>",
table->derived_select_number);
item_list.push_back(new Item_string(buff, len, default_charset_info));
}
else
item_list.push_back(new Item_string(table->table_name,
strlen(table->table_name),
default_charset_info));
item_list.push_back(new Item_string(join_type_str[tab->type],strlen(join_type_str[tab->type]),default_charset_info));
tmp1.length(0); tmp2.length(0);
key_map bits;
@ -7311,29 +7304,25 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
result->send_error(0,NullS);
}
}
if (!join->thd->lex.select->next_select())
{
save_lock=thd->lock;
thd->lock=(MYSQL_LOCK *)0;
result->send_eof();
thd->lock=save_lock;
}
DBUG_VOID_RETURN;
}
static void describe_info(THD *thd, const char *info)
int mysql_explain_select(THD *thd, SELECT_LEX *select_lex, char const *type,
select_result *result)
{
List<Item> field_list;
String *packet= &thd->packet;
select_lex->type= type;
thd->lex.select= select_lex;
SELECT_LEX_UNIT *unit= select_lex->master_unit();
int res= mysql_select(thd,(TABLE_LIST*) select_lex->table_list.first,
select_lex->item_list,
select_lex->where,
(ORDER*) select_lex->order_list.first,
(ORDER*) select_lex->group_list.first,
select_lex->having,
(ORDER*) thd->lex.proc_list.first,
select_lex->options | thd->options | SELECT_DESCRIBE,
result, unit, select_lex, 0);
/* Don't log this into the slow query log */
thd->lex.select_lex.options&= ~(QUERY_NO_INDEX_USED | QUERY_NO_GOOD_INDEX_USED);
field_list.push_back(new Item_empty_string("Comment",80));
if (send_fields(thd,field_list,1))
return; /* purecov: inspected */
packet->length(0);
net_store_data(packet,info);
if (!my_net_write(&thd->net,(char*) packet->ptr(),packet->length()))
send_eof(&thd->net);
return res;
}

23
sql/sql_union.cc
View file

@ -111,6 +111,7 @@ int st_select_lex_unit::prepare(THD *thd, select_result *result)
DBUG_ENTER("st_select_lex_unit::prepare");
this->thd= thd;
this->result= result;
SELECT_LEX *lex_select_save= thd->lex.select;
/* Global option */
if (((void*)(global_parameters)) == ((void*)this))
@ -148,9 +149,9 @@ int st_select_lex_unit::prepare(THD *thd, select_result *result)
/* Create a list of items that will be in the result set */
while ((item= it++))
if (item_list.push_back(item))
DBUG_RETURN(-1);
goto err;
if (setup_fields(thd,first_table,item_list,0,0,1))
DBUG_RETURN(-1);
goto err;
}
bzero((char*) &tmp_table_param,sizeof(tmp_table_param));
@ -162,7 +163,7 @@ int st_select_lex_unit::prepare(THD *thd, select_result *result)
(first_select()->options | thd->options |
TMP_TABLE_ALL_COLUMNS),
this)))
DBUG_RETURN(-1);
goto err;
table->file->extra(HA_EXTRA_WRITE_CACHE);
table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
bzero((char*) &result_table_list,sizeof(result_table_list));
@ -171,7 +172,7 @@ int st_select_lex_unit::prepare(THD *thd, select_result *result)
result_table_list.table=table;
if (!(union_result=new select_union(table)))
DBUG_RETURN(-1);
goto err;
union_result->save_time_stamp=!describe;
union_result->tmp_table_param=&tmp_table_param;
@ -202,9 +203,13 @@ int st_select_lex_unit::prepare(THD *thd, select_result *result)
(ORDER*) NULL,
sl, this, 0);
if (res | thd->fatal_error)
DBUG_RETURN(res | thd->fatal_error);
goto err;
}
thd->lex.select= lex_select_save;
DBUG_RETURN(res | thd->fatal_error);
err:
thd->lex.select= lex_select_save;
DBUG_RETURN(-1);
}
int st_select_lex_unit::exec()
@ -214,7 +219,7 @@ int st_select_lex_unit::exec()
{
if (optimized && item && item->assigned())
item->assigned(0); // We will reinit & rexecute unit
SELECT_LEX *lex_select_save= thd->lex.select;
for (SELECT_LEX *sl= first_select(); sl; sl= sl->next_select())
{
thd->lex.select=sl;
@ -234,8 +239,12 @@ int st_select_lex_unit::exec()
res= sl->join->error;
if (res)
{
thd->lex.select= lex_select_save;
DBUG_RETURN(res);
}
}
thd->lex.select= lex_select_save;
optimized= 1;
}
@ -283,7 +292,7 @@ int st_select_lex_unit::exec()
0:
(ORDER*)global_parameters->order_list.first,
(ORDER*) NULL, NULL, (ORDER*) NULL,
thd->options, result, this, 1);
thd->options, result, this, first_select(), 1);
if (found_rows_for_union && !res)
thd->limit_found_rows = (ulonglong)table->file->records;
}

3
sql/table.h
View file

@ -128,6 +128,9 @@ struct st_table {
uint temp_pool_slot;
/* number of select if it is derived table */
uint derived_select_number;
THD *in_use; /* Which thread uses this */
struct st_table *next,*prev;
};