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planner: fix index merge reader may lost enforced prop sort when tabl…
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…e plan is pure (#49844) (#49889)

close #49605
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@ti-chi-bot
ti-chi-bot authored Feb 27, 2024
1 parent 8d61d77 commit c03c310
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Showing 3 changed files with 34 additions and 2 deletions.
28 changes: 28 additions & 0 deletions executor/index_merge_reader_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -1080,6 +1080,34 @@ func TestOrderByWithLimit(t *testing.T) {
}
}

func TestIndexMergeIssue49605(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test;")
tk.MustExec("drop table if exists t;")
tk.MustExec("CREATE TABLE `t` (`a` mediumint(9) NOT NULL,`b` year(4) NOT NULL,`c` varbinary(62) NOT NULL,`d` text COLLATE utf8mb4_unicode_ci NOT NULL,`e` tinyint(4) NOT NULL DEFAULT '115',`f` smallint(6) DEFAULT '2675',`g` date DEFAULT '1981-09-17',`h` mediumint(8) unsigned NOT NULL,`i` varchar(384) CHARACTER SET gbk COLLATE gbk_bin DEFAULT NULL,UNIQUE KEY `idx_23` (`h`,`f`),PRIMARY KEY (`h`,`a`) /*T![clustered_index] CLUSTERED */,UNIQUE KEY `idx_25` (`h`,`i`(5),`e`)) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin PARTITION BY HASH (`h`) PARTITIONS 1;")
tk.MustExec("INSERT INTO `t` VALUES (2065948,1999,_binary '8jxN','rf',-54,-5656,'1987-07-03',259254,'7me坨'),(-8248164,2024,_binary 'zA5A','s)DAkX3',-93,-12983,'2027-12-18',299573,'LUf咲'),(-6131509,2023,_binary 'xdex#Y2','1th%h',-51,19149,'2013-10-28',428279,'矷莒X'),(7545837,1998,_binary 'PCVO','&(lJw6',30,4093,'1987-07-03',736235,'腏@TOIJ'),(-7449472,2029,_binary 'B7&jrl','EjbFfX!',80,-7590,'2011-11-03',765580,'堮ZQF_'),(-7176200,1988,_binary 'tiPglv7mX_#','CnCtNb',-25,NULL,'1987-07-03',842956,'Gq羣嗳殓'),(-115168,2036,_binary 'BqmX$-4It','!8#dvH',82,18787,'1991-09-20',921706,'椉2庘v'),(6665100,1987,_binary '4IJgk0fr4','(D',-73,28628,'1987-07-03',1149668,'摔玝S渉'),(-4065661,2021,_binary '8G%','xDO39xw#',-107,17356,'1970-12-20',1316239,'+0c35掬-阗'),(7622462,1990,_binary '&o+)s)D0','kjoS9Dzld',84,688,'1987-07-03',1403663,'$H鍿_M~'),(5269354,2018,_binary 'wq9hC8','s8XPrN+',-2,-31272,'2008-05-26',1534517,'y椁n躁Q'),(2065948,1982,_binary '8jxNjbksV','g$+i4dg',11,19800,'1987-07-03',1591457,'z^+H~薼A'),(4076971,2024,_binary '&!RrsH','7Mpvk',-63,-632,'2032-10-28',1611011,'鬰+EXmx'),(3522062,1981,_binary ')nq#!UiHKk8','j~wFe77ai',50,6951,'1987-07-03',1716854,'J'),(7859777,2012,_binary 'PBA5xgJ&G&','UM7o!u',18,-5978,'1987-07-03',1967012,'e)浢L獹'),(2065948,2028,_binary '8jxNjbk','JmsEki9t4',51,12002,'2017-12-23',1981288,'mp氏襚');")
tk.MustQuery("explain format='brief' SELECT /*+ AGG_TO_COP() STREAM_AGG()*/ (NOT (`t`.`i`>=_UTF8MB4'j筧8') OR NOT (`t`.`i`=_UTF8MB4'暈lH忧ll6')) IS TRUE,MAX(`t`.`e`) AS `r0`,QUOTE(`t`.`i`) AS `r1` FROM `t` WHERE `t`.`h`>240817 OR `t`.`i` BETWEEN _UTF8MB4'WVz' AND _UTF8MB4'G#駧褉ZC領*lov' GROUP BY `t`.`i`;").Check(
testkit.Rows("Projection 2666.67 root istrue(or(not(ge(test.t.i, j筧8)), not(eq(test.t.i, 暈lH忧ll6))))->Column#11, Column#10, quote(test.t.i)->Column#12",
"└─StreamAgg 2666.67 root group by:test.t.i, funcs:max(test.t.e)->Column#10, funcs:firstrow(test.t.i)->test.t.i",
" └─Sort 3333.33 root test.t.i",
" └─IndexMerge 3333.33 root type: union",
" ├─TableRangeScan(Build) 3333.33 cop[tikv] table:t, partition:p0 range:(240817,+inf], keep order:false, stats:pseudo",
" ├─IndexFullScan(Build) 0.00 cop[tikv] table:t, partition:p0, index:idx_25(h, i, e) keep order:false, stats:pseudo",
" └─TableRowIDScan(Probe) 3333.33 cop[tikv] table:t, partition:p0 keep order:false, stats:pseudo"))
tk.MustQuery("select count(*) from (SELECT /*+ AGG_TO_COP() STREAM_AGG()*/ (NOT (`t`.`i`>=_UTF8MB4'j筧8') OR NOT (`t`.`i`=_UTF8MB4'暈lH忧ll6')) IS TRUE,MAX(`t`.`e`) AS `r0`,QUOTE(`t`.`i`) AS `r1` FROM `t` WHERE `t`.`h`>240817 OR `t`.`i` BETWEEN _UTF8MB4'WVz' AND _UTF8MB4'G#駧褉ZC領*lov' GROUP BY `t`.`i`) derived;").Check(
testkit.Rows("16"))
tk.MustQuery("explain format='brief' SELECT /*+ AGG_TO_COP() */ (NOT (`t`.`i`>=_UTF8MB4'j筧8') OR NOT (`t`.`i`=_UTF8MB4'暈lH忧ll6')) IS TRUE,MAX(`t`.`e`) AS `r0`,QUOTE(`t`.`i`) AS `r1` FROM `t` WHERE `t`.`h`>240817 OR `t`.`i` BETWEEN _UTF8MB4'WVz' AND _UTF8MB4'G#駧褉ZC領*lov' GROUP BY `t`.`i`;").Check(
testkit.Rows("Projection 2666.67 root istrue(or(not(ge(test.t.i, j筧8)), not(eq(test.t.i, 暈lH忧ll6))))->Column#11, Column#10, quote(test.t.i)->Column#12",
"└─HashAgg 2666.67 root group by:test.t.i, funcs:max(test.t.e)->Column#10, funcs:firstrow(test.t.i)->test.t.i",
" └─IndexMerge 3333.33 root type: union",
" ├─TableRangeScan(Build) 3333.33 cop[tikv] table:t, partition:p0 range:(240817,+inf], keep order:false, stats:pseudo",
" ├─IndexFullScan(Build) 0.00 cop[tikv] table:t, partition:p0, index:idx_25(h, i, e) keep order:false, stats:pseudo",
" └─TableRowIDScan(Probe) 3333.33 cop[tikv] table:t, partition:p0 keep order:false, stats:pseudo"))
tk.MustQuery("select count(*) from (SELECT /*+ AGG_TO_COP() */ (NOT (`t`.`i`>=_UTF8MB4'j筧8') OR NOT (`t`.`i`=_UTF8MB4'暈lH忧ll6')) IS TRUE,MAX(`t`.`e`) AS `r0`,QUOTE(`t`.`i`) AS `r1` FROM `t` WHERE `t`.`h`>240817 OR `t`.`i` BETWEEN _UTF8MB4'WVz' AND _UTF8MB4'G#駧褉ZC領*lov' GROUP BY `t`.`i`) derived;").Check(
testkit.Rows("16"))
}

func TestProcessInfoRaceWithIndexScan(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
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4 changes: 3 additions & 1 deletion planner/core/plan.go
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Original file line number Diff line number Diff line change
Expand Up @@ -86,7 +86,9 @@ func enforceProperty(p *property.PhysicalProperty, tsk task, ctx sessionctx.Cont
}
tsk = mpp.enforceExchanger(p)
}
if p.IsSortItemEmpty() || tsk.plan() == nil {
// when task is double cop task warping a index merge reader, tsk.plan() may be nil when indexPlanFinished is marked
// as false, while the real plan is in idxMergePartPlans. tsk.plan()==nil is not right here.
if p.IsSortItemEmpty() || tsk.invalid() {
return tsk
}
if p.TaskTp != property.MppTaskType {
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4 changes: 3 additions & 1 deletion planner/core/task.go
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Original file line number Diff line number Diff line change
Expand Up @@ -101,7 +101,7 @@ type copTask struct {
}

func (t *copTask) invalid() bool {
return t.tablePlan == nil && t.indexPlan == nil
return t.tablePlan == nil && t.indexPlan == nil && len(t.idxMergePartPlans) == 0
}

func (t *rootTask) invalid() bool {
Expand All @@ -120,6 +120,8 @@ func (t *copTask) copy() task {
return &nt
}

// copTask plan should be careful with indexMergeReader, whose real plan is stored in
// idxMergePartPlans, when its indexPlanFinished is marked with false.
func (t *copTask) plan() PhysicalPlan {
if t.indexPlanFinished {
return t.tablePlan
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