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Fix UNION

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New faster list iterators
Change list code to be simpler and faster
Optimize count(distinct)
New error messages for UNION
Make create_tmp_table more general to be usable by UNION
This commit is contained in:
monty@tik.mysql.fi
2001-08-02 06:29:50 +03:00
parent 423f2851c5
commit b13d453d50
57 changed files with 798 additions and 472 deletions
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60
mysql-test/r/union.result Normal file
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a b
1 a
2 b
3 c
4 d
5 f
6 e
a b
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2 b
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a b
1 a
2 b
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4 d
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a b
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7 g
0 #
0 #
1 a
2 b
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3 c
3 c
4 d
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7 g
a b
1 a
2 b
3 c
t1 b count(*)
t1 a 1
t1 b 1
t1 c 2
t2 c 1
t2 d 1
t2 e 1
t2 f 1
table type possible_keys key key_len ref rows Extra
t2 ALL NULL NULL NULL NULL 4

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mysql-test/r/unions_one.result
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a b
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1
mysql-test/t/analyse.test
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# Test of procedure analyse
#
drop table if exists t1,t2;
create table t1 (i int, j int);
insert into t1 values (1,2), (3,4), (5,6), (7,8);
select * from t1 procedure analyse();

29
mysql-test/t/union.test Normal file
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#
# Test of unions
#
drop table if exists t1,t2;
CREATE TABLE t1 (a int not null, b char (10) not null);
insert into t1 values(1,'a'),(2,'b'),(3,'c'),(3,'c');
CREATE TABLE t2 (a int not null, b char (10) not null);
insert into t2 values (3,'c'),(4,'d'),(5,'f'),(6,'e');
select a,b from t1 union select a,b from t2;
select a,b from t1 union all select a,b from t2;
select a,b from t1 union all select a,b from t2 order by b;
select a,b from t1 union all select a,b from t2 union select 7,'g';
select 0,'#' union select a,b from t1 union all select a,b from t2 union select 7,'gg';
select a,b from t1 union select a,b from t1;
select 't1',b,count(*) from t1 group by b UNION select 't2',b,count(*) from t2 group by b;
explain select a,b from t1 union all select a,b from t2;
# Test some error conditions with UNION
--error 1213
select a,b from t1 into outfile 'skr' union select a,b from t2;
--error 1213
select a,b from t1 order by a union select a,b from t2;
--error 1214
select a,b from t1 union select a from t2;
drop table t1,t2;

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mysql-test/t/unions_one.test
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#
# Test of unions
#
drop table if exists t1,t2;
CREATE TABLE t1 (a int not null, b char (10) not null);
insert into t1 values(1,"a"),(2,"b"),(3,"c");
CREATE TABLE t2 (a int not null, b char (10) not null);
insert into t2 values (3,"c"),(4,"d"),(5,"e"),(6,"f");
select a,b from t1 union select a,b from t2;
select a,b from t1 union all select a,b from t2;
drop table t1,t2;