4 Commits

Author	SHA1	Message	Date
jan	1bd22ab327	Setting a isolation level of the transaction to read committed ... weakens the locks for this session similarly like the option innodb_locks_unsafe_for_binlog. This patch removes almost all gap locking (used in next-key locking) and makes MySQL to release the row locks on the rows which does not belong to result set. Additionally, nonlocking selects on INSERT INTO SELECT, UPDATE ... (SELECT ...), and CREATE ... SELECT ... use a nonlocking consistent read. If a binlog is used, then binlog format should be set to row based binloging to make the execution of the complex SQL statements.	2006-03-27 05:33:30 +00:00
osku	ac69f8c21b	Style cleanups: Convert spaces to tabs, remove trailing whitespace, other ... misc cleanups.	2006-02-21 12:37:54 +00:00
marko	e62060724f	Implement semi-consistent read to reduce lock conflicts at the cost ... of breaking serializability. (Bug #3300) ha_innobase::unlock_row(): reset the "did semi consistent read" flag ha_innobase::was_semi_consistent_read(), ha_innobase::try_semi_consistent_read(): new methods row_prebuilt_t, row_create_prebuilt(): add field row_read_type for keeping track of semi-consistent reads row_vers_build_for_semi_consistent_read(), row_sel_build_committed_vers_for_mysql(): new functions row_search_for_mysql(): implement semi-consistent reads	2006-01-26 10:45:27 +00:00
osku	2903c72469	Import 5.0 code.	2005-10-27 07:29:40 +00:00