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sql_union.cc, sql_select.cc:

Browse Source 
Code clean-up
sql_union.cc, union.test, union.result:
  A fix for a bug #978.
  This enables that NULL's can be entered into UNION's result set,
  although first SELECT columns are NOT NULL.
  This is also a start of fixing UNION's properly regarding type
  acceptance.
sql_select.cc:
  A commit for my second July SPRINT task


mysql-test/r/union.result:
  A fix for a bug #978.
  
  This enables that NULL's can be entered into UNION's result set,
  although first SELECT columns are NOT NULL.
  
  This is also a start of fixing UNION's properly regarding type
  acceptance.
mysql-test/t/union.test:
  A fix for a bug #978.
  
  This enables that NULL's can be entered into UNION's result set,
  although first SELECT columns are NOT NULL.
  
  This is also a start of fixing UNION's properly regarding type
  acceptance.
sql/sql_select.cc:
  Code clean-up
sql/sql_union.cc:
  Code clean-up
This commit is contained in:
unknown
2003-08-06 18:48:34 +03:00
parent 5dadac8701
commit b5e8569674
3 changed files with 28 additions and 10 deletions
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13
mysql-test/r/union.result
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@ -328,3 +328,16 @@ id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 const PRIMARY PRIMARY 4 const 1
2 UNION t1 ref b b 5 const 1 Using where
drop table t1,t2;
create table t1 ( id int not null auto_increment, primary key (id) ,user_name text );
create table t2 ( id int not null auto_increment, primary key (id) ,group_name text );
create table t3 ( id int not null auto_increment, primary key (id) ,user_id int ,index user_idx (user_id) ,foreign key (user_id) references users(id) ,group_id int ,index group_idx (group_id) ,foreign key (group_id) references groups(id) );
insert into t1 (user_name) values ('Tester');
insert into t2 (group_name) values ('Group A');
insert into t2 (group_name) values ('Group B');
insert into t3 (user_id, group_id) values (1,1);
select 1 'is_in_group', a.user_name, c.group_name, b.id from t1 a, t3 b, t2 c where a.id = b.user_id and b.group_id = c.id UNION select 0 'is_in_group', a.user_name, c.group_name, null from t1 a, t2 c;
is_in_group user_name group_name id
1 Tester Group A 1
0 Tester Group A NULL
0 Tester Group B NULL
drop table t1, t2, t3;