GROUP BY cardinality estimation improvement

Title

Topic

Performance

Created

2016-02-24 18:04:30

Last modified

2016-04-04 11:56:03 (6 years, 11 months ago)

Latest email

2016-04-02 14:59:16 (6 years, 11 months ago)

Status

2016-03: Committed

Target version

Authors

Tomas Vondra (fuzzycz)

Reviewers

Alexander Korotkov (smagen), Dean Rasheed (deanr)Become reviewer

Committer

Dean Rasheed (deanr)

Links

Emails

improving GROUP BY estimation: First at 2016-02-24 01:12:33 by Tomas Vondra <tomas.vondra at 2ndquadrant.com>
Latest at 2016-04-02 14:59:16 by Tom Lane <tgl at sss.pgh.pa.us>
Latest attachment (estimate-num-groups-v5.patch) at 2016-04-02 12:20:13 from Dean Rasheed <dean.a.rasheed at gmail.com>
    Attachment (estimate-num-groups-v5.patch) at 2016-04-02 12:20:13 from Dean Rasheed <dean.a.rasheed at gmail.com> (Patch: Yes)
    Attachment (estimate-num-groups-v4.patch) at 2016-03-30 13:03:41 from Tomas Vondra <tomas.vondra at 2ndquadrant.com> (Patch: Yes)
    Attachment (estimate-num-groups-v3.patch) at 2016-03-18 00:37:56 from Tomas Vondra <tomas.vondra at 2ndquadrant.com> (Patch: Yes)
    Attachment (estimate-num-groups-v2.txt) at 2016-02-25 23:16:05 from Mark Dilger <hornschnorter at gmail.com> (Patch: Yes)
    Attachment (estimate-num-groups-v1.patch) at 2016-02-24 01:12:33 from Tomas Vondra <tomas.vondra at 2ndquadrant.com> (Patch: Yes)

History

When	Who	What
2016-04-04 11:56:03	Dean Rasheed (deanr)	Closed in commitfest 2016-03 with status: Committed
2016-03-31 18:43:36	Dean Rasheed (deanr)	Added deanr as committer
2016-03-31 18:43:32	Dean Rasheed (deanr)	New status: Ready for Committer
2016-03-30 13:06:08	Tomas Vondra (fuzzycz)	New status: Needs review
2016-03-22 14:37:40	Alexander Korotkov (smagen)	New status: Waiting on Author
2016-03-18 00:40:00	Tomas Vondra (fuzzycz)	New status: Needs review
2016-03-13 15:25:14	Dean Rasheed (deanr)	Added deanr as reviewer
2016-03-03 11:53:46	Alexander Korotkov (smagen)	New status: Waiting on Author
2016-03-03 08:37:18	Alexander Korotkov (smagen)	Added smagen as reviewer
2016-02-24 18:04:41	Tomas Vondra (fuzzycz)	Changed authors to Tomas Vondra (fuzzycz)
2016-02-24 18:04:30	Tomas Vondra (fuzzycz)	Attached mail thread 56CD0381.5060502@2ndquadrant.com
2016-02-24 18:04:30	Tomas Vondra (fuzzycz)	Created patch record