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mirror of https://github.com/MariaDB/server.git synced 2025-07-30 16:24:05 +03:00

Merge sinisa@work.mysql.com:/home/bk/mysql-4.0

into sinisa.nasamreza.org:/mnt/work/mysql-4.0


scripts/mysqld_safe.sh:
  Auto merged
sql/net_pkg.cc:
  Auto merged
sql/sql_acl.cc:
  Auto merged
This commit is contained in:
unknown
2003-01-21 15:54:36 +02:00
43 changed files with 280 additions and 117 deletions

View File

@ -1,5 +1,8 @@
drop table if exists t1;
create table t1 (id int not null, str char(10), unique(str));
explain select * from t1;
table type possible_keys key key_len ref rows Extra
t1 system NULL NULL NULL NULL 0 const row not found
insert into t1 values (1, null),(2, null),(3, "foo"),(4, "bar");
select * from t1 where str is null;
id str

View File

@ -467,3 +467,17 @@ NOT NULL);
max(value)
4
drop table t1,t2,t3;
create table t1 (a blob null);
insert into t1 values (NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(""),(""),(""),("b");
select a,count(*) from t1 group by a;
a count(*)
NULL 9
3
b 1
set option sql_big_tables=1;
select a,count(*) from t1 group by a;
a count(*)
NULL 9
3
b 1
drop table t1;

View File

@ -14,8 +14,7 @@ insert into t1 values (101);
insert into t1 values (105);
insert into t1 values (106);
insert into t1 values (107);
insert into t2 values (107);
insert into t2 values (75);
insert into t2 values (107),(75),(1000);
select t1.id, t2.id from t1, t2 where t2.id = t1.id;
id id
107 107
@ -28,6 +27,16 @@ select t1.id, count(t2.id) from t1,t2 where t2.id = t1.id group by t2.id;
id count(t2.id)
75 1
107 1
select t1.id,t2.id from t2 left join t1 on t1.id>=74 and t1.id<=0 where t2.id=75 and t1.id is null;
id id
NULL 75
explain select t1.id,t2.id from t2 left join t1 on t1.id>=74 and t1.id<=0 where t2.id=75 and t1.id is null;
table type possible_keys key key_len ref rows Extra
t1 const PRIMARY NULL NULL NULL 1 Impossible ON condition
t2 ALL NULL NULL NULL NULL 3 Using where
explain select t1.id, t2.id from t1, t2 where t2.id = t1.id and t1.id <0 and t1.id > 0;
Comment
Impossible WHERE noticed after reading const tables
drop table t1,t2;
CREATE TABLE t1 (
id int(11) NOT NULL auto_increment,

View File

@ -3,6 +3,7 @@
drop table if exists t1;
create table t1 (id int not null, str char(10), unique(str));
explain select * from t1;
insert into t1 values (1, null),(2, null),(3, "foo"),(4, "bar");
select * from t1 where str is null;
select * from t1 where str="foo";
@ -12,8 +13,10 @@ explain select * from t1 ignore key (str) where str="foo";
explain select * from t1 use key (str,str) where str="foo";
#The following should give errors
!$1072 explain select * from t1 use key (str,str,foo) where str="foo";
!$1072 explain select * from t1 ignore key (str,str,foo) where str="foo";
--error 1072
explain select * from t1 use key (str,str,foo) where str="foo";
--error 1072
explain select * from t1 ignore key (str,str,foo) where str="foo";
drop table t1;
explain select 1;

View File

@ -354,3 +354,14 @@ m.c1id = c1.id AND c1.active = 'Yes' LEFT JOIN t3 AS c2 ON m.c2id =
c2.id AND c2.active = 'Yes' WHERE m.pid=1 AND (c1.id IS NOT NULL OR c2.id IS
NOT NULL);
drop table t1,t2,t3;
#
# Test bug in GROUP BY on BLOB that is NULL or empty
#
create table t1 (a blob null);
insert into t1 values (NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(""),(""),(""),("b");
select a,count(*) from t1 group by a;
set option sql_big_tables=1;
select a,count(*) from t1 group by a;
drop table t1;

View File

@ -19,13 +19,18 @@ insert into t1 values (105);
insert into t1 values (106);
insert into t1 values (107);
insert into t2 values (107);
insert into t2 values (75);
insert into t2 values (107),(75),(1000);
select t1.id, t2.id from t1, t2 where t2.id = t1.id;
select t1.id, count(t2.id) from t1,t2 where t2.id = t1.id group by t1.id;
select t1.id, count(t2.id) from t1,t2 where t2.id = t1.id group by t2.id;
#
# Test problems with impossible ON or WHERE
#
select t1.id,t2.id from t2 left join t1 on t1.id>=74 and t1.id<=0 where t2.id=75 and t1.id is null;
explain select t1.id,t2.id from t2 left join t1 on t1.id>=74 and t1.id<=0 where t2.id=75 and t1.id is null;
explain select t1.id, t2.id from t1, t2 where t2.id = t1.id and t1.id <0 and t1.id > 0;
drop table t1,t2;
#