diff options
| author | unknown <istruewing@stella.local> | 2007-10-26 15:29:06 +0200 |
|---|---|---|
| committer | unknown <istruewing@stella.local> | 2007-10-26 15:29:06 +0200 |
| commit | 612bedb23421c502e3efa94c2f614590b4feb5b7 (patch) | |
| tree | 2c5b1d6c35f15069b7b20f444eea6e29bee34026 /mysql-test/r/myisam.result | |
| parent | 82107254e4df599b85c6e5c2816b2d37a75ef589 (diff) | |
| download | mariadb-git-612bedb23421c502e3efa94c2f614590b4feb5b7.tar.gz | |
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.
myisam/mi_check.c:
Bug#4692 - DISABLE/ENABLE KEYS waste a space
Added function mi_drop_all_indexes() to support drop of all indexes
in case we want to re-enable non-empty disabled indexes.
Changed mi_repair(), mi_repair_by_sort(), and mi_repair_parallel()
to use the new function instead of duplicate drop index code.
mysql-test/r/myisam.result:
Bug#4692 - DISABLE/ENABLE KEYS waste a space
Added test result.
mysql-test/t/myisam.test:
Bug#4692 - DISABLE/ENABLE KEYS waste a space
Added test.
Diffstat (limited to 'mysql-test/r/myisam.result')
| -rw-r--r-- | mysql-test/r/myisam.result | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/mysql-test/r/myisam.result b/mysql-test/r/myisam.result index 7fc29cd13ca..176d0e97012 100644 --- a/mysql-test/r/myisam.result +++ b/mysql-test/r/myisam.result @@ -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 |