6 commits

Author	SHA1	Message	Date
sergefp@mysql.com	2c9d2cf671	Fix for bug#5138: hash indexes on heap tables support statistics. ... KEY::rec_per_key is updated every time 1/HEAP_STATS_UPDATE_THRESHOLD part of table records has been changed.	2004-09-08 02:07:53 +04:00
ingo@mysql.com	784c9526ec	WL#1687 - Optimize UNION DISTINCT ... UNION ALL (again). ... HEAP: Copies the key count to a backup variable and sets the key count to zero. That way, no HEAP function will ever try to touch any index. Re-enabling is done by copying back the backup variable. To avoid memory leak at table close, disable deletes all index trees. Re-enabling must be done with empty indexes and data anyway. Otherwise, the indexes would need to be repaired, wich HEAP is not capable of. MyISAM: Only the key_map is cleared and set. Re-enabling must be done with empty indexes and data. Otherwise, repair needs to be done which will enable all keys persistently. The former implementation disabled only non-unique keys and maked this persistent. The new implementation additionally can disable all keys, but only without making this persistent. Re-enabling all keys can be done without repair, if data file and indexes are empty.	2004-05-06 15:53:01 +02:00
bar@gw.udmsearch.izhnet.ru	eab2893dac	RB-Tree indexes support in HEAP tables ... Renamed _hp_func -> hp_func mi_key_cmp moved to /mysys/my_handler.c New tests for HEAP tables	2002-04-25 13:36:55 +05:00
monty@hundin.mysql.fi	b658662ae4	Update copyright ... Fixed memory leak on shutdown (Affects the embedded version & MyODBC)	2001-12-06 14:10:51 +02:00
monty@hundin.mysql.fi	a1be2a894f	Fix of UNION code ... Added heap_delete_table Added HA_EXTRA_PREPARE_FOR_DELETE Added and use my_dup() for faster open of tables. Removed not working no-mix-table-type	2001-08-19 14:43:51 +03:00
bk@work.mysql.com	f4c589ff6c	Import changeset	2000-07-31 21:29:14 +02:00