sqlite

Commit Graph

Author	SHA1	Message	Date
dan	937994aa65	Add a test case to check that the previous commit is effective. FossilOrigin-Name: 948d6e5d07bc14b6de32ec2144c716a5532f894c	2014-11-05 14:19:05 +00:00
drh	c8bbce1e6a	If a skip-scan is a proper subset of some other scan, then adjust the cost of the skip-scan upward so that it is more costly than the other scan. Such a cost imbalance can arise under STAT4 because of difficulties in getting an accurate estimate for skip-scans. FossilOrigin-Name: f4b22a2620a5dc48949048c2ecbd226755d4b2c3	2014-10-21 01:05:09 +00:00

Author

SHA1

Message

Date

dan

937994aa65

Add a test case to check that the previous commit is effective.

FossilOrigin-Name: 948d6e5d07bc14b6de32ec2144c716a5532f894c

2014-11-05 14:19:05 +00:00

drh

c8bbce1e6a

If a skip-scan is a proper subset of some other scan, then adjust the

cost of the skip-scan upward so that it is more costly than the other scan.
Such a cost imbalance can arise under STAT4 because of difficulties in getting
an accurate estimate for skip-scans.

FossilOrigin-Name: f4b22a2620a5dc48949048c2ecbd226755d4b2c3

2014-10-21 01:05:09 +00:00

2 Commits