19 Commits

Author	SHA1	Message	Date
Hoshea Jiang	7755d25aba	*: Integrate SkyWalking-eyes to check license headers in CI and fix licenses headers (#27198)	2021-08-16 18:52:00 +08:00
Yiding Cui	ae7346fc64	statistics: introduce the weighted reservoir sampling (#24089)	2021-04-22 16:43:54 +08:00
Yuanjia Zhang	bd12ea96cc	statistics: use index fm-sketches instead of bucket NDV to calculate global NDV for indexes (#23962)	2021-04-15 14:59:55 +08:00
Yuanjia Zhang	b1b7730402	statistics: add more tests to check accurateness of global-stats (#22948)	2021-03-01 12:49:56 +08:00
Chengpeng Yan	62354d04b7	statistics: merge partition-level FMSketch to global-level FMSketch and update the column NDV (#22878)	2021-02-23 19:06:23 +08:00
Chengpeng Yan	f3fe4895cb	statistics: support to store FMSketch and add FMSketch to column stats (#22841) ... * add FMSketch to mysql.stats_histograms * statistics: support store FMSketch and add FMSketch to histogram * FIX UT * Create Stats_FM_Sketch Table * fix UT * add some tests * FIX ut * move fmSketch from histogram to column.stats * remove unused code and comments * fix ut * fix ut * fix ut * fix ut * fix ut * fix ut * finish the FMSketch.MemoryUsage function * add some comments for FMSketch.MemoryUsage function * fix typo Co-authored-by: ti-srebot <66930949+ti-srebot@users.noreply.github.com> Co-authored-by: Ti Chi Robot <71242396+ti-chi-bot@users.noreply.github.com>	2021-02-23 10:39:09 +08:00
Zejun Li	06e73a56cc	*: compatible with Go 1.14's checkptr (#18189)	2020-06-24 13:04:47 +08:00
Liu Cong	a7bdb82402	*: Reduce memory operations by simply passing size hint to make (#14922)	2020-02-25 15:44:36 +08:00
tiancaiamao	32b1dbd8d5	*: rename "github.com/pkg/errors" to "github.com/pingcap/errors" (#8136) ... We import "github.com/pkg/errors" in the code, and actually put the "github.com/pingcap/errors" there in the vendor path. That's a dirty hack, and prevent the introduce of Go module.	2018-11-01 16:09:07 +08:00
lysu	cb03f2bec1	move from juju/errors to pkg/errors (#7151)	2018-09-12 15:42:20 +08:00
Jack Yu	357d5df66b	remove useless alias (#6473)	2018-05-05 22:36:54 +08:00
maiyang	0553deeb42	*:improve code readability and unified aliases (#5997)	2018-03-15 10:52:36 +08:00
Ewan Chou	ecbd60c3ff	*: add arguement StatementContext to Encode functions. (#5566)	2018-01-06 17:31:08 +08:00
Ewan Chou	62433663e5	util/types: change types path (#5007) ... * util/types: change types path	2017-11-04 10:37:14 -05:00
Haibin Xie	a7bcc2b335	stats: change FMSketch hash function from fnv to murmur (#4541)	2017-09-15 20:02:39 +08:00
Haibin Xie	200fe45550	stats: prework for analyze push down (#4478)	2017-09-11 14:06:21 +08:00
Haibin Xie	0e438de9ff	*: move sample collector from executor to stats (#4468)	2017-09-08 12:21:10 +08:00
Haibin Xie	16cefef717	executor, statistics: use FM sketch to estimate NDV (#2966)	2017-04-01 15:03:54 +08:00
Haibin Xie	6d7dc9228a	statistics: implement FM Sketch (#2947)	2017-03-30 11:27:16 +08:00