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Better optimization for InnoDB and BDB tables for ORDER BY

Browse Source 
Build-tools/Do-compile:
  Merge with 4.0
Docs/manual.texi:
  Changelog
mysql-test/r/innodb.result:
  New tests cases for ORDER BY
mysql-test/r/myisam.result:
  New tests cases for ORDER BY
mysql-test/t/innodb.test:
  New tests cases for ORDER BY
mysql-test/t/myisam.test:
  New tests cases for ORDER BY
This commit is contained in:
unknown
2001-11-29 15:34:37 +02:00
parent 00d80ffff1
commit ace649189d
10 changed files with 143 additions and 7 deletions
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16
mysql-test/r/innodb.result
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@ -483,3 +483,19 @@ id name value uid
1 one one value 101
3 three three value 103
6 two other value 102
table type possible_keys key key_len ref rows Extra
t1 index NULL PRIMARY 4 NULL 4
table type possible_keys key key_len ref rows Extra
t1 index NULL b 4 NULL 4
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4 Using filesort
table type possible_keys key key_len ref rows Extra
t1 index NULL PRIMARY 4 NULL 4 Using index
table type possible_keys key key_len ref rows Extra
t1 index NULL b 4 NULL 4 Using index
table type possible_keys key key_len ref rows Extra
t1 index NULL b 4 NULL 4 Using index
table type possible_keys key key_len ref rows Extra
t1 index NULL b 4 NULL 4 Using index
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4

16
mysql-test/r/myisam.result
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@ -20,3 +20,19 @@ test.t1 optimize status Table is already up to date
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Comment
t1 0 PRIMARY 1 a A 5 NULL NULL
t1 1 b 1 b A 1 NULL NULL
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4 Using filesort
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4 Using filesort
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4 Using filesort
table type possible_keys key key_len ref rows Extra
t1 index NULL PRIMARY 4 NULL 4 Using index
table type possible_keys key key_len ref rows Extra
t1 index NULL b 4 NULL 4 Using index
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4 Using filesort
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4

16
mysql-test/t/innodb.test
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@ -513,3 +513,19 @@ set insert_id=6;
replace into t1 (value,name,uid) values ('other value','two',102);
select * from t1;
drop table t1;
#
# Test of how ORDER BY works when doing it on the whole table
#
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;
explain select * from t1 order by b;
explain select * from t1 order by c;
explain select a from t1 order by a;
explain select b from t1 order by b;
explain select a,b from t1 order by b;
explain select a,b from t1;
explain select a,b,c from t1;
drop table t1;

16
mysql-test/t/myisam.test
View File

@ -48,3 +48,19 @@ show index from t1;
optimize table t1;
show index from t1;
drop table t1;
#
# Test of how ORDER BY works when doing it on the whole table
#
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;
explain select * from t1 order by b;
explain select * from t1 order by c;
explain select a from t1 order by a;
explain select b from t1 order by b;
explain select a,b from t1 order by b;
explain select a,b from t1;
explain select a,b,c from t1;
drop table t1;