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Commit 8cc5fe11 authored by istruewing@stella.local's avatar istruewing@stella.local
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Bug#4692 - DISABLE/ENABLE KEYS waste a space 

Disabling and enabling indexes on a non-empty table grows the
index file.

Disabling indexes just sets a flag per non-unique index and does not
free the index blocks of the affected indexes. Re-enabling indexes
creates new indexes with new blocks. The old blocks remain unused
in the index file.

Fixed by dropping and re-creating all indexes if non-empty disabled
indexes exist when enabling indexes. Dropping all indexes resets
the internal end-of-file marker to the end of the index file header.
It also clears the root block pointers of every index and clears the
deleted blocks chains. This way all blocks are declared as free.
parent da9b4288
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Showing with 216 additions and 130 deletions
myisam/mi_check.c
View file @ 8cc5fe11
This diff is collapsed.
mysql-test/r/bdb_notembedded.result deleted 100644 → 0
View file @ da9b4288
set autocommit=1;
reset master;
create table bug16206 (a int);
insert into bug16206 values(1);
start transaction;
insert into bug16206 values(2);
commit;
show binlog events;
Log_name Pos Event_type Server_id End_log_pos Info
f n Format_desc 1 n Server ver: VERSION, Binlog ver: 4
f n Query 1 n use `test`; create table bug16206 (a int)
f n Query 1 n use `test`; insert into bug16206 values(1)
f n Query 1 n use `test`; insert into bug16206 values(2)
drop table bug16206;
reset master;
create table bug16206 (a int) engine= bdb;
insert into bug16206 values(0);
insert into bug16206 values(1);
start transaction;
insert into bug16206 values(2);
commit;
insert into bug16206 values(3);
show binlog events;
Log_name Pos Event_type Server_id End_log_pos Info
f n Format_desc 1 n Server ver: VERSION, Binlog ver: 4
f n Query 1 n use `test`; create table bug16206 (a int) engine= bdb
f n Query 1 n use `test`; insert into bug16206 values(0)
f n Query 1 n use `test`; insert into bug16206 values(1)
f n Query 1 n use `test`; BEGIN
f n Query 1 n use `test`; insert into bug16206 values(2)
f n Query 1 n use `test`; COMMIT
f n Query 1 n use `test`; insert into bug16206 values(3)
drop table bug16206;
set autocommit=0;
End of 5.0 tests
mysql-test/r/myisam.result
View file @ 8cc5fe11
......@@ -1806,4 +1806,29 @@ SELECT a FROM t1 FORCE INDEX (inx) WHERE a=1;
a
1
DROP TABLE t1;
CREATE TABLE t1 (c1 INT, c2 INT, UNIQUE INDEX (c1), INDEX (c2)) ENGINE=MYISAM;
SHOW TABLE STATUS LIKE 't1';
Name Engine Version Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Collation Checksum Create_options Comment
t1 MyISAM 10 Fixed 0 # # # 1024 # # # # # # #
INSERT INTO t1 VALUES (1,1);
SHOW TABLE STATUS LIKE 't1';
Name Engine Version Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Collation Checksum Create_options Comment
t1 MyISAM 10 Fixed 1 # # # 3072 # # # # # # #
ALTER TABLE t1 DISABLE KEYS;
SHOW TABLE STATUS LIKE 't1';
Name Engine Version Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Collation Checksum Create_options Comment
t1 MyISAM 10 Fixed 1 # # # 3072 # # # # # # #
ALTER TABLE t1 ENABLE KEYS;
SHOW TABLE STATUS LIKE 't1';
Name Engine Version Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Collation Checksum Create_options Comment
t1 MyISAM 10 Fixed 1 # # # 3072 # # # # # # #
ALTER TABLE t1 DISABLE KEYS;
SHOW TABLE STATUS LIKE 't1';
Name Engine Version Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Collation Checksum Create_options Comment
t1 MyISAM 10 Fixed 1 # # # 3072 # # # # # # #
ALTER TABLE t1 ENABLE KEYS;
SHOW TABLE STATUS LIKE 't1';
Name Engine Version Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Collation Checksum Create_options Comment
t1 MyISAM 10 Fixed 1 # # # 3072 # # # # # # #
DROP TABLE t1;
End of 5.0 tests
mysql-test/t/bdb_notembedded.test deleted 100644 → 0
View file @ da9b4288
-- source include/not_embedded.inc
-- source include/have_bdb.inc
#
# Bug #16206: Superfluous COMMIT event in binlog when updating BDB in autocommit mode
#
set autocommit=1;
let $VERSION=`select version()`;
reset master;
create table bug16206 (a int);
insert into bug16206 values(1);
start transaction;
insert into bug16206 values(2);
commit;
--replace_result $VERSION VERSION
--replace_column 1 f 2 n 5 n
show binlog events;
drop table bug16206;
reset master;
create table bug16206 (a int) engine= bdb;
insert into bug16206 values(0);
insert into bug16206 values(1);
start transaction;
insert into bug16206 values(2);
commit;
insert into bug16206 values(3);
--replace_result $VERSION VERSION
--replace_column 1 f 2 n 5 n
show binlog events;
drop table bug16206;
set autocommit=0;
--echo End of 5.0 tests
mysql-test/t/myisam.test
View file @ 8cc5fe11
......@@ -1161,4 +1161,30 @@ ALTER TABLE t1 ENABLE KEYS;
SELECT a FROM t1 FORCE INDEX (inx) WHERE a=1;
DROP TABLE t1;
#
# Bug#4692 - DISABLE/ENABLE KEYS waste a space
#
CREATE TABLE t1 (c1 INT, c2 INT, UNIQUE INDEX (c1), INDEX (c2)) ENGINE=MYISAM;
--replace_column 6 # 7 # 8 # 10 # 11 # 12 # 13 # 14 # 15 # 16 #
SHOW TABLE STATUS LIKE 't1';
INSERT INTO t1 VALUES (1,1);
--replace_column 6 # 7 # 8 # 10 # 11 # 12 # 13 # 14 # 15 # 16 #
SHOW TABLE STATUS LIKE 't1';
ALTER TABLE t1 DISABLE KEYS;
--replace_column 6 # 7 # 8 # 10 # 11 # 12 # 13 # 14 # 15 # 16 #
SHOW TABLE STATUS LIKE 't1';
ALTER TABLE t1 ENABLE KEYS;
--replace_column 6 # 7 # 8 # 10 # 11 # 12 # 13 # 14 # 15 # 16 #
SHOW TABLE STATUS LIKE 't1';
ALTER TABLE t1 DISABLE KEYS;
--replace_column 6 # 7 # 8 # 10 # 11 # 12 # 13 # 14 # 15 # 16 #
SHOW TABLE STATUS LIKE 't1';
ALTER TABLE t1 ENABLE KEYS;
--replace_column 6 # 7 # 8 # 10 # 11 # 12 # 13 # 14 # 15 # 16 #
SHOW TABLE STATUS LIKE 't1';
#--exec ls -log var/master-data/test/t1.MYI
#--exec myisamchk -dvv var/master-data/test/t1.MYI
#--exec myisamchk -iev var/master-data/test/t1.MYI
DROP TABLE t1;
--echo End of 5.0 tests
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