sqlite

Author	SHA1	Message	Date
drh	1d32488037	Performance enhancement for single-table queries with many OR-connected WHERE clause terms and multiple indexes with the same left-most columns. FossilOrigin-Name: 1461d543ac8a3e4a54405067893146c74576bb4e	2014-12-04 20:24:50 +00:00
mistachkin	6b9da12856	Fix a couple of typos in comments. No changes to code. FossilOrigin-Name: a758465e3cfa7e0cb8749d097cd6fb5f86b60955	2014-09-06 02:00:41 +00:00
drh	d8b77e20fc	Query planner heuristic update: When doing a full table scan on a table that has an equality constraint on an unindexed column, do not allow the estimated number of output rows to be greater than half the total number of rows in the table. FossilOrigin-Name: 73954f93c4c6f880c6e01d0d130e3fed40fd4106	2014-09-06 01:35:57 +00:00
dan	7fa0631ece	Fix a problem causing an inaccurate stat4-based estimate for the number of rows visited by a range scan. FossilOrigin-Name: 052d89b554a947b7e420b7feb6650f5069b7cefa	2014-08-28 16:01:31 +00:00
drh	ddef5dc044	When the estimated cost to do a sort overwhelms the estimated cost to do individual table lookups, make sure that the table lookup costs are still taken into consideration when selecting the lookup algorithm. FossilOrigin-Name: ec5d84ba69c100d9565425ed74040a49e410ea03	2014-08-07 16:50:00 +00:00
drh	69e9782f23	Add a test case to ensure that estLog() works for negative numbers. FossilOrigin-Name: 813469d98519b609669a004b7b604af78ef40c02	2014-06-06 20:49:19 +00:00