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Merge #155407
155407: opt: fix multi-column correlation bug r=mgartner a=mgartner See the inline comment for details. Fixes #155282 Release note (bug fix): A bug has been fixed that prevented the query optimizer from recognizing correlated filters when one of the filtered columns had a single distinct value across all rows. This bug could lead to sub-optimal query plans in some cases. Co-authored-by: Marcus Gartner <[email protected]>
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‎pkg/sql/opt/exec/execbuilder/testdata/forecast‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -1560,7 +1560,7 @@ EXPLAIN (OPT, VERBOSE) SELECT * FROM t WHERE a = 3 AND b = 13
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----
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select
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├── columns: a:1 b:2
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├── stats: [rows=1, distinct(1)=1, null(1)=0, distinct(2)=1, null(2)=0]
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├── stats: [rows=1, distinct(1)=1, null(1)=0, distinct(2)=1, null(2)=0, distinct(1,2)=1, null(1,2)=-1]
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│ histogram(1)=
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│ histogram(2)= 0 1
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│ <--- 13
@@ -1603,7 +1603,7 @@ EXPLAIN (OPT, VERBOSE) SELECT * FROM t WHERE a = 3 AND b = 13
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----
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select
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├── columns: a:1 b:2
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├── stats: [rows=1, distinct(1)=1, null(1)=0, distinct(2)=1, null(2)=0]
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├── stats: [rows=1, distinct(1)=1, null(1)=0, distinct(2)=1, null(2)=0, distinct(1,2)=1, null(1,2)=-1]
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│ histogram(1)= 0 1
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│ <--- 3
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│ histogram(2)=

‎pkg/sql/opt/memo/statistics_builder.go‎

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -4230,10 +4230,10 @@ func (sb *statisticsBuilder) selectivityFromMultiColDistinctCounts(
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singleColSel := sb.selectivityFromDistinctCount(singleColStat, inputSingleColStat, inputStats.RowCount)
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multiColSelWithIndepAssumption.Multiply(singleColSel)
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// Don't bother including columns in the multi-column calculation that
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// don't contribute to the selectivity.
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// If the single-column selectivity is 1, then the values calculated
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// below will not change. Keep the column in the set because it may
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// prefix other columns in multi-column stats.
42354236
if singleColSel == props.OneSelectivity {
4236-
multiColSet.Remove(col)
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continue
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}
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‎pkg/sql/opt/memo/testdata/stats/inverted-geo-multi-column‎

Lines changed: 6 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -76,7 +76,7 @@ project
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└── select
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├── columns: k:1(int!null) g:2(geometry!null) s:3(string!null)
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├── immutable
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├── stats: [rows=11.1111, distinct(2)=7, null(2)=0, distinct(3)=1, null(3)=0]
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├── stats: [rows=11.1111, distinct(2)=7, null(2)=0, distinct(3)=1, null(3)=0, distinct(2,3)=7, null(2,3)=0]
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│ histogram(3)= 0 11.111
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│ <--- 'banana'
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├── key: (1)
@@ -126,7 +126,7 @@ project
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└── select
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├── columns: k:1(int!null) g:2(geometry!null) s:3(string!null)
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├── immutable
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├── stats: [rows=11.1111, distinct(2)=7, null(2)=0, distinct(3)=1, null(3)=0]
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├── stats: [rows=11.1111, distinct(2)=7, null(2)=0, distinct(3)=1, null(3)=0, distinct(2,3)=7, null(2,3)=0]
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│ histogram(3)= 0 11.111
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│ <--- 'banana'
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├── key: (1)
@@ -188,7 +188,7 @@ project
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└── select
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├── columns: k:1(int!null) g:2(geometry!null) s:3(string!null)
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├── immutable
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├── stats: [rows=22.2222, distinct(2)=7, null(2)=0, distinct(3)=2, null(3)=0]
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├── stats: [rows=22.2222, distinct(2)=7, null(2)=0, distinct(3)=2, null(3)=0, distinct(2,3)=7, null(2,3)=0]
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│ histogram(3)= 0 11.111 0 11.111
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│ <--- 'banana' --- 'cherry'
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├── key: (1)
@@ -241,7 +241,7 @@ project
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└── select
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├── columns: k:1(int!null) g:2(geometry!null) s:3(string!null)
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├── immutable
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├── stats: [rows=22.2222, distinct(2)=7, null(2)=0, distinct(3)=2, null(3)=0]
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├── stats: [rows=22.2222, distinct(2)=7, null(2)=0, distinct(3)=2, null(3)=0, distinct(2,3)=7, null(2,3)=0]
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│ histogram(3)= 0 11.111 0 11.111
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│ <--- 'banana' --- 'cherry'
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├── key: (1)
@@ -301,7 +301,7 @@ project
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└── select
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├── columns: k:1(int!null) g:2(geometry!null) s:3(string!null) i:4(int!null)
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├── immutable
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├── stats: [rows=1, distinct(2)=1, null(2)=0, distinct(3)=1, null(3)=0, distinct(4)=1, null(4)=0, distinct(3,4)=1, null(3,4)=0]
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├── stats: [rows=1, distinct(2)=1, null(2)=0, distinct(3)=1, null(3)=0, distinct(4)=1, null(4)=0, distinct(2-4)=1, null(2-4)=0]
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│ histogram(3)= 0 0.5 0 0.5
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│ <--- 'banana' --- 'cherry'
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│ histogram(4)= 0 1
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└── select
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├── columns: k:1(int!null) g:2(geometry!null) s:3(string!null) i:4(int!null)
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├── immutable
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├── stats: [rows=1, distinct(2)=1, null(2)=0, distinct(3)=1, null(3)=0, distinct(4)=1, null(4)=0, distinct(3,4)=1, null(3,4)=0]
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├── stats: [rows=1, distinct(2)=1, null(2)=0, distinct(3)=1, null(3)=0, distinct(4)=1, null(4)=0, distinct(2-4)=1, null(2-4)=0]
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│ histogram(3)= 0 0.5 0 0.5
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│ <--- 'banana' --- 'cherry'
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│ histogram(4)= 0 0.16667 0 0.33333 0 0.5

‎pkg/sql/opt/memo/testdata/stats/partial-index-scan‎

Lines changed: 21 additions & 21 deletions
Original file line numberDiff line numberDiff line change
@@ -114,12 +114,12 @@ SELECT * FROM a WHERE i < k AND i % 3 = 0
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index-join a
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├── columns: k:1(int!null) i:2(int!null) s:3(string) t:4(string)
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├── immutable
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├── stats: [rows=555.556, distinct(1)=555.556, null(1)=0, distinct(2)=500, null(2)=0]
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├── stats: [rows=555.556, distinct(1)=555.556, null(1)=0, distinct(2)=500, null(2)=0, distinct(1,2)=555.556, null(1,2)=-1]
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├── key: (1)
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├── fd: (1)-->(2-4)
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└── scan a@idx,partial
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├── columns: k:1(int!null) i:2(int!null)
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├── stats: [rows=555.556, distinct(1)=555.556, null(1)=0, distinct(2)=500, null(2)=0]
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├── stats: [rows=555.556, distinct(1)=555.556, null(1)=0, distinct(2)=500, null(2)=0, distinct(1,2)=555.556, null(1,2)=-1]
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├── key: (1)
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└── fd: (1)-->(2)
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@@ -206,12 +206,12 @@ index-join a
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├── fd: (1)-->(2-4), (3)==(4), (4)==(3)
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└── select
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├── columns: k:1(int!null) s:3(string!null) t:4(string!null)
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├── stats: [rows=1.0395, distinct(3)=1.0395, null(3)=0, distinct(4)=1.0395, null(4)=0]
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├── stats: [rows=1.0395, distinct(3)=1.0395, null(3)=0, distinct(4)=1.0395, null(4)=0, distinct(3,4)=1.0395, null(3,4)=-1]
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├── key: (1)
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├── fd: (1)-->(3,4), (3)==(4), (4)==(3)
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├── scan a@idx,partial
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│ ├── columns: k:1(int!null) s:3(string!null) t:4(string!null)
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│ ├── stats: [rows=9.3555, distinct(1)=9.3555, null(1)=0, distinct(3)=9.3555, null(3)=0, distinct(4)=9.3555, null(4)=0]
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│ ├── stats: [rows=9.3555, distinct(1)=9.3555, null(1)=0, distinct(3)=9.3555, null(3)=0, distinct(4)=9.3555, null(4)=0, distinct(3,4)=9.3555, null(3,4)=0]
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│ ├── key: (1)
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│ └── fd: (1)-->(3,4), (3)==(4), (4)==(3)
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└── filters
@@ -872,7 +872,7 @@ project
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├── inverted constraint: /7/1
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│ └── spans: ["x"/"y", "x"/"y"]
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├── flags: force-index=partial
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├── stats: [rows=2.20441, distinct(4)=2, null(4)=0, distinct(7)=2.20441, null(7)=0]
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├── stats: [rows=2.20441, distinct(4)=2, null(4)=0, distinct(7)=2.20441, null(7)=0, distinct(4,7)=2.20441, null(4,7)=0]
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└── key: (1)
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878878
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@@ -889,7 +889,7 @@ index-join inv
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├── inverted constraint: /7/1
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│ └── spans: ["x"/"y", "x"/"y"]
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├── flags: force-index=partial
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├── stats: [rows=2.20441, distinct(4)=2, null(4)=0, distinct(7)=2.20441, null(7)=0]
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├── stats: [rows=2.20441, distinct(4)=2, null(4)=0, distinct(7)=2.20441, null(7)=0, distinct(4,7)=2.20441, null(4,7)=0]
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895895
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@@ -916,7 +916,7 @@ project
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│ ├── inverted constraint: /7/1
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│ │ └── spans: ["x"/"y", "x"/"y"]
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│ ├── flags: force-index=partial
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│ ├── stats: [rows=2.20441, distinct(4)=2, null(4)=0, distinct(7)=2.20441, null(7)=0]
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│ ├── stats: [rows=2.20441, distinct(4)=2, null(4)=0, distinct(7)=2.20441, null(7)=0, distinct(4,7)=2.20441, null(4,7)=0]
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└── filters
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└── s:4 = 'foo' [type=bool, outer=(4), constraints=(/4: [/'foo' - /'foo']; tight), fd=()-->(4)]
@@ -940,7 +940,7 @@ select
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│ ├── inverted constraint: /7/1
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│ │ └── spans: ["x"/"y", "x"/"y"]
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│ ├── flags: force-index=partial
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│ ├── stats: [rows=2.20441, distinct(4)=2, null(4)=0, distinct(7)=2.20441, null(7)=0]
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│ ├── stats: [rows=2.20441, distinct(4)=2, null(4)=0, distinct(7)=2.20441, null(7)=0, distinct(4,7)=2.20441, null(4,7)=0]
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└── filters
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└── s:4 = 'foo' [type=bool, outer=(4), constraints=(/4: [/'foo' - /'foo']; tight), fd=()-->(4)]
@@ -964,7 +964,7 @@ select
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│ ├── inverted constraint: /7/1
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│ │ └── spans: ["x"/"y", "x"/"y"]
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│ ├── flags: force-index=partial
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│ ├── stats: [rows=2.20441, distinct(4)=2, null(4)=0, distinct(7)=2.20441, null(7)=0]
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│ ├── stats: [rows=2.20441, distinct(4)=2, null(4)=0, distinct(7)=2.20441, null(7)=0, distinct(4,7)=2.20441, null(4,7)=0]
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└── filters
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├── (i:2 > 0) AND (i:2 < 10) [type=bool, outer=(2), constraints=(/2: [/1 - /9]; tight)]
@@ -1224,7 +1224,7 @@ project
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└── select
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├── columns: k:1(int!null) g:2(geometry!null) s:3(string!null)
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├── immutable
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├── stats: [rows=16.6667, distinct(2)=7, null(2)=0, distinct(3)=3, null(3)=0]
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├── stats: [rows=16.6667, distinct(2)=7, null(2)=0, distinct(3)=3, null(3)=0, distinct(2,3)=7, null(2,3)=0]
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├── fd: (1)-->(2,3)
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├── index-join spatial
@@ -1251,7 +1251,7 @@ project
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│ │ ├── ["B\xfd\x10\x00\x00\x00\x00\x00\x00\x00", "B\xfd\x10\x00\x00\x00\x00\x00\x00\x00"]
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│ │ ├── ["B\xfd\x10\x00\x00\x00\x00\x00\x00\x01", "B\xfd\x12\x00\x00\x00\x00\x00\x00\x00")
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│ │ └── ["B\xfd\x14\x00\x00\x00\x00\x00\x00\x00", "B\xfd\x14\x00\x00\x00\x00\x00\x00\x00"]
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│ ├── stats: [rows=16.6667, distinct(1)=16.6667, null(1)=0, distinct(3)=3, null(3)=0, distinct(7)=16.6667, null(7)=0]
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│ ├── stats: [rows=16.6667, distinct(1)=16.6667, null(1)=0, distinct(3)=3, null(3)=0, distinct(7)=16.6667, null(7)=0, distinct(3,7)=16.6667, null(3,7)=0]
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│ └── key: (1,7)
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└── filters
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└── st_intersects('010200000002000000000000000000E03F000000000000E03F666666666666E63F666666666666E63F', g:2) [type=bool, outer=(2), immutable, constraints=(/2: (/NULL - ])]
@@ -1269,7 +1269,7 @@ project
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└── select
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├── columns: k:1(int!null) g:2(geometry!null) s:3(string!null)
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├── immutable
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├── stats: [rows=5.55556, distinct(2)=5.55556, null(2)=0, distinct(3)=1, null(3)=0]
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├── stats: [rows=5.55556, distinct(2)=5.55556, null(2)=0, distinct(3)=1, null(3)=0, distinct(2,3)=5.55556, null(2,3)=0]
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├── fd: ()-->(3), (1)-->(2)
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├── index-join spatial
@@ -1296,7 +1296,7 @@ project
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│ │ ├── ["B\xfd\x10\x00\x00\x00\x00\x00\x00\x00", "B\xfd\x10\x00\x00\x00\x00\x00\x00\x00"]
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│ │ ├── ["B\xfd\x10\x00\x00\x00\x00\x00\x00\x01", "B\xfd\x12\x00\x00\x00\x00\x00\x00\x00")
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│ │ └── ["B\xfd\x14\x00\x00\x00\x00\x00\x00\x00", "B\xfd\x14\x00\x00\x00\x00\x00\x00\x00"]
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│ ├── stats: [rows=16.6667, distinct(1)=16.6667, null(1)=0, distinct(3)=3, null(3)=0, distinct(7)=16.6667, null(7)=0]
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│ ├── stats: [rows=16.6667, distinct(1)=16.6667, null(1)=0, distinct(3)=3, null(3)=0, distinct(7)=16.6667, null(7)=0, distinct(3,7)=16.6667, null(3,7)=0]
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└── filters
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├── st_intersects('010200000002000000000000000000E03F000000000000E03F666666666666E63F666666666666E63F', g:2) [type=bool, outer=(2), immutable, constraints=(/2: (/NULL - ])]
@@ -1335,7 +1335,7 @@ project
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└── select
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├── immutable
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├── stats: [rows=8.54701, distinct(2)=7, null(2)=0, distinct(3)=3, null(3)=0]
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├── stats: [rows=8.54701, distinct(2)=7, null(2)=0, distinct(3)=3, null(3)=0, distinct(2,3)=7, null(2,3)=0]
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├── fd: (1)-->(2,3)
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├── index-join spatial
@@ -1362,7 +1362,7 @@ project
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│ │ ├── ["B\xfd\x10\x00\x00\x00\x00\x00\x00\x00", "B\xfd\x10\x00\x00\x00\x00\x00\x00\x00"]
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│ │ ├── ["B\xfd\x10\x00\x00\x00\x00\x00\x00\x01", "B\xfd\x12\x00\x00\x00\x00\x00\x00\x00")
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│ │ └── ["B\xfd\x14\x00\x00\x00\x00\x00\x00\x00", "B\xfd\x14\x00\x00\x00\x00\x00\x00\x00"]
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│ ├── stats: [rows=8.54701, distinct(1)=8.54701, null(1)=0, distinct(3)=3, null(3)=0, distinct(7)=8.54701, null(7)=0]
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│ ├── stats: [rows=8.54701, distinct(1)=8.54701, null(1)=0, distinct(3)=3, null(3)=0, distinct(7)=8.54701, null(7)=0, distinct(3,7)=8.54701, null(3,7)=0]
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└── filters
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└── st_intersects('010200000002000000000000000000E03F000000000000E03F666666666666E63F666666666666E63F', g:2) [type=bool, outer=(2), immutable, constraints=(/2: (/NULL - ])]
@@ -1378,7 +1378,7 @@ project
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└── select
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├── immutable
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├── stats: [rows=2.849, distinct(2)=2.849, null(2)=0, distinct(3)=1, null(3)=0]
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├── stats: [rows=2.849, distinct(2)=2.849, null(2)=0, distinct(3)=1, null(3)=0, distinct(2,3)=2.849, null(2,3)=0]
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├── fd: ()-->(3), (1)-->(2)
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├── index-join spatial
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│ │ ├── ["B\xfd\x10\x00\x00\x00\x00\x00\x00\x00", "B\xfd\x10\x00\x00\x00\x00\x00\x00\x00"]
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│ │ ├── ["B\xfd\x10\x00\x00\x00\x00\x00\x00\x01", "B\xfd\x12\x00\x00\x00\x00\x00\x00\x00")
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│ │ └── ["B\xfd\x14\x00\x00\x00\x00\x00\x00\x00", "B\xfd\x14\x00\x00\x00\x00\x00\x00\x00"]
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│ ├── stats: [rows=8.54701, distinct(1)=8.54701, null(1)=0, distinct(3)=3, null(3)=0, distinct(7)=8.54701, null(7)=0]
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│ ├── stats: [rows=8.54701, distinct(1)=8.54701, null(1)=0, distinct(3)=3, null(3)=0, distinct(7)=8.54701, null(7)=0, distinct(3,7)=8.54701, null(3,7)=0]
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└── filters
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├── st_intersects('010200000002000000000000000000E03F000000000000E03F666666666666E63F666666666666E63F', g:2) [type=bool, outer=(2), immutable, constraints=(/2: (/NULL - ])]
@@ -1465,7 +1465,7 @@ project
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└── select
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├── immutable
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├── stats: [rows=22.2222, distinct(2)=7, null(2)=0, distinct(3)=2, null(3)=0]
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├── stats: [rows=22.2222, distinct(2)=7, null(2)=0, distinct(3)=2, null(3)=0, distinct(2,3)=7, null(2,3)=0]
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│ histogram(3)= 0 11.111 0 11.111
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│ <--- 'banana' --- 'cherry'
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├── key: (1)
@@ -1516,7 +1516,7 @@ project
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└── select
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├── immutable
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├── stats: [rows=11.1111, distinct(2)=7, null(2)=0, distinct(3)=1, null(3)=0]
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├── stats: [rows=11.1111, distinct(2)=7, null(2)=0, distinct(3)=1, null(3)=0, distinct(2,3)=7, null(2,3)=0]
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│ <--- 'banana'
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@@ -1603,7 +1603,7 @@ project
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└── select
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├── stats: [rows=22.2222, distinct(2)=7, null(2)=0, distinct(3)=2, null(3)=0]
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├── stats: [rows=22.2222, distinct(2)=7, null(2)=0, distinct(3)=2, null(3)=0, distinct(2,3)=7, null(2,3)=0]
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│ histogram(3)= 0 11.111 0 11.111
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│ <--- 'banana' --- 'cherry'
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├── key: (1)
@@ -1652,7 +1652,7 @@ project
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└── select
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├── columns: k:1(int!null) g:2(geometry!null) s:3(string!null)
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├── immutable
1655-
├── stats: [rows=11.1111, distinct(2)=7, null(2)=0, distinct(3)=1, null(3)=0]
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├── stats: [rows=11.1111, distinct(2)=7, null(2)=0, distinct(3)=1, null(3)=0, distinct(2,3)=7, null(2,3)=0]
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│ histogram(3)= 0 11.111
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│ <--- 'banana'
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├── key: (1)

‎pkg/sql/opt/memo/testdata/stats/scan‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -2136,7 +2136,7 @@ index-join t
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├── constraint: /2/1
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│ ├── [/NULL/5 - /NULL/5]
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│ └── [/5 - /5]
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├── stats: [rows=1.502, distinct(1)=1.502, null(1)=0, distinct(2)=1.502, null(2)=1.502]
2139+
├── stats: [rows=1.502, distinct(1)=1.502, null(1)=0, distinct(2)=1.502, null(2)=1.502, distinct(1,2)=1.502, null(1,2)=1.502]
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├── key: (1)
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└── fd: (1)-->(2)
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@@ -3048,7 +3048,7 @@ top-k
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│ ├── [/8/4/10/1/NULL/'2022-02-04 19:25:25.356+00' - /8/4/10/1/NULL/'2022-02-11 19:25:25.356+00']
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│ └── [/8/6/10/1/NULL/'2022-02-04 19:25:25.356+00' - /8/6/10/1/NULL/'2022-02-11 19:25:25.356+00']
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├── immutable
3051-
├── stats: [rows=1, distinct(1)=1, null(1)=0, distinct(2)=1, null(2)=1, distinct(3)=1, null(3)=0, distinct(4)=1, null(4)=0, distinct(5)=1, null(5)=0, distinct(6)=1, null(6)=0, distinct(1,4)=1, null(1,4)=0, distinct(2,3,5)=1, null(2,3,5)=0, distinct(1-5)=1, null(1-5)=0]
3051+
├── stats: [rows=1, distinct(1)=1, null(1)=0, distinct(2)=1, null(2)=1, distinct(3)=1, null(3)=0, distinct(4)=1, null(4)=0, distinct(5)=1, null(5)=0, distinct(6)=1, null(6)=0, distinct(1,4,6)=1, null(1,4,6)=0, distinct(2,3,5)=1, null(2,3,5)=0, distinct(1-6)=1, null(1-6)=0]
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│ histogram(1)= 0 0 1 1.6534e-15
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│ <--- '2022-02-04 19:25:25.355999+00' --- '2022-02-11 19:25:25.356+00'
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│ histogram(3)= 0 1

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