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opt: fix trigger+computed column internal error #154789

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25 changes: 21 additions & 4 deletions pkg/sql/opt/optbuilder/mutation_builder.go
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Original file line number Diff line number Diff line change
Expand Up @@ -795,7 +795,22 @@ func (mb *mutationBuilder) addSynthesizedDefaultCols(
}

// addSynthesizedComputedCols is a helper method for addSynthesizedColsForInsert
// and addSynthesizedColsForUpdate that scans the list of table columns, looking
// and addSynthesizedColsForUpdate that projects computed column expressions and
// adds the corresponding target table columns to targetColList and
// targetColSet. See projectSynthesizedComputedCols for more details.
//
// NOTE: colIDs is updated with the column IDs of any synthesized columns which
// are added to mb.outScope. If restrict is true, only columns that depend on
// columns that were already in the list (plus all write-only columns) are
// updated.
func (mb *mutationBuilder) addSynthesizedComputedCols(colIDs opt.OptionalColList, restrict bool) {
mb.targetColSet = mb.projectSynthesizedComputedCols(colIDs, restrict)
for col, ok := mb.targetColSet.Next(0); ok; col, ok = mb.targetColSet.Next(col + 1) {
mb.targetColList = append(mb.targetColList, col)
}
}

// projectSynthesizedComputedCols scans the list of table columns, looking
// for any that are computed and do not yet have values provided by the input
// expression. New columns are synthesized for any missing columns using the
// computed column expression.
Expand All @@ -804,7 +819,9 @@ func (mb *mutationBuilder) addSynthesizedDefaultCols(
// are added to mb.outScope. If restrict is true, only columns that depend on
// columns that were already in the list (plus all write-only columns) are
// updated.
func (mb *mutationBuilder) addSynthesizedComputedCols(colIDs opt.OptionalColList, restrict bool) {
func (mb *mutationBuilder) projectSynthesizedComputedCols(
colIDs opt.OptionalColList, restrict bool,
) (targetColSet opt.ColSet) {
// We will construct a new Project operator that will contain the newly
// synthesized column(s).
pb := makeProjectionBuilder(mb.b, mb.outScope)
Expand Down Expand Up @@ -876,11 +893,11 @@ func (mb *mutationBuilder) addSynthesizedComputedCols(colIDs opt.OptionalColList
}

// Add corresponding target column.
mb.targetColList = append(mb.targetColList, tabColID)
mb.targetColSet.Add(tabColID)
targetColSet.Add(tabColID)
}

mb.outScope = pb.Finish()
return targetColSet
}

// maybeAddRegionColLookup adds a lookup join to the target table of a foreign
Expand Down
106 changes: 106 additions & 0 deletions pkg/sql/opt/optbuilder/testdata/trigger
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Original file line number Diff line number Diff line change
Expand Up @@ -1253,3 +1253,109 @@ insert t133329
└── filters
├── a = t133329.a
└── k != t133329.k

# Regression test for #154672. Do not set target columns when re-projecting
# computed columns after a BEFORE trigger.
exec-ddl
CREATE TABLE t154672 (
k INT PRIMARY KEY,
a INT,
b INT AS (a + 1) STORED
)
----

exec-ddl
CREATE FUNCTION f154672() RETURNS TRIGGER LANGUAGE PLpgSQL AS $$
BEGIN
RETURN COALESCE(NEW, OLD);
END
$$
----

exec-ddl
CREATE TRIGGER tr154672 BEFORE INSERT OR UPDATE OR DELETE ON t154672 FOR EACH ROW EXECUTE FUNCTION f154672()
----

norm
INSERT INTO t154672 (k, a) VALUES (1, 2) ON CONFLICT (k) DO UPDATE SET a = 3
----
upsert t154672
├── arbiter indexes: t154672_pkey
├── columns: <none>
├── canary column: k:9
├── fetch columns: k:9 a:10 b:11
├── insert-mapping:
│ ├── k_new:29 => k:1
│ ├── a_new:30 => a:2
│ └── b_comp:31 => b:3
├── update-mapping:
│ ├── upsert_k:40 => k:1
│ ├── upsert_a:41 => a:2
│ └── upsert_b:42 => b:3
├── before-triggers
│ └── tr154672
└── project
├── columns: upsert_k:40 upsert_a:41 upsert_b:42 k:9 a:10 b:11 k_new:29 a_new:30 b_comp:31
├── project
│ ├── columns: k_new:37 a_new:38 k:9 a:10 b:11 k_new:29 a_new:30 b_comp:31
│ ├── barrier
│ │ ├── columns: column1:6!null column2:7!null b_comp:8!null k:9 a:10 b:11 crdb_internal_mvcc_timestamp:12 tableoid:13 new:14 f154672:28!null k_new:29 a_new:30 b_comp:31 a_new:32!null b_comp:33!null old:34 new:35 f154672:36!null
│ │ └── select
│ │ ├── columns: column1:6!null column2:7!null b_comp:8!null k:9 a:10 b:11 crdb_internal_mvcc_timestamp:12 tableoid:13 new:14 f154672:28!null k_new:29 a_new:30 b_comp:31 a_new:32!null b_comp:33!null old:34 new:35 f154672:36!null
│ │ ├── project
│ │ │ ├── columns: f154672:36 column1:6!null column2:7!null b_comp:8!null k:9 a:10 b:11 crdb_internal_mvcc_timestamp:12 tableoid:13 new:14 f154672:28!null k_new:29 a_new:30 b_comp:31 a_new:32!null b_comp:33!null old:34 new:35
│ │ │ ├── barrier
│ │ │ │ ├── columns: column1:6!null column2:7!null b_comp:8!null k:9 a:10 b:11 crdb_internal_mvcc_timestamp:12 tableoid:13 new:14 f154672:28!null k_new:29 a_new:30 b_comp:31 a_new:32!null b_comp:33!null old:34 new:35
│ │ │ │ └── project
│ │ │ │ ├── columns: new:35 old:34 b_comp:33!null a_new:32!null b_comp:31 k_new:29 a_new:30 column1:6!null column2:7!null b_comp:8!null k:9 a:10 b:11 crdb_internal_mvcc_timestamp:12 tableoid:13 new:14 f154672:28!null
│ │ │ │ ├── barrier
│ │ │ │ │ ├── columns: column1:6!null column2:7!null b_comp:8!null k:9 a:10 b:11 crdb_internal_mvcc_timestamp:12 tableoid:13 new:14 f154672:28!null
│ │ │ │ │ └── select
│ │ │ │ │ ├── columns: column1:6!null column2:7!null b_comp:8!null k:9 a:10 b:11 crdb_internal_mvcc_timestamp:12 tableoid:13 new:14 f154672:28!null
│ │ │ │ │ ├── project
│ │ │ │ │ │ ├── columns: f154672:28 column1:6!null column2:7!null b_comp:8!null k:9 a:10 b:11 crdb_internal_mvcc_timestamp:12 tableoid:13 new:14
│ │ │ │ │ │ ├── barrier
│ │ │ │ │ │ │ ├── columns: column1:6!null column2:7!null b_comp:8!null k:9 a:10 b:11 crdb_internal_mvcc_timestamp:12 tableoid:13 new:14
│ │ │ │ │ │ │ └── project
│ │ │ │ │ │ │ ├── columns: new:14 column1:6!null column2:7!null b_comp:8!null k:9 a:10 b:11 crdb_internal_mvcc_timestamp:12 tableoid:13
│ │ │ │ │ │ │ ├── left-join (cross)
│ │ │ │ │ │ │ │ ├── columns: column1:6!null column2:7!null b_comp:8!null k:9 a:10 b:11 crdb_internal_mvcc_timestamp:12 tableoid:13
│ │ │ │ │ │ │ │ ├── values
│ │ │ │ │ │ │ │ │ ├── columns: column1:6!null column2:7!null b_comp:8!null
│ │ │ │ │ │ │ │ │ └── (1, 2, 3)
│ │ │ │ │ │ │ │ ├── select
│ │ │ │ │ │ │ │ │ ├── columns: k:9!null a:10 b:11 crdb_internal_mvcc_timestamp:12 tableoid:13
│ │ │ │ │ │ │ │ │ ├── scan t154672
│ │ │ │ │ │ │ │ │ │ ├── columns: k:9!null a:10 b:11 crdb_internal_mvcc_timestamp:12 tableoid:13
│ │ │ │ │ │ │ │ │ │ ├── computed column expressions
│ │ │ │ │ │ │ │ │ │ │ └── b:11
│ │ │ │ │ │ │ │ │ │ │ └── a:10 + 1
│ │ │ │ │ │ │ │ │ │ └── flags: avoid-full-scan disabled not visible index feature
│ │ │ │ │ │ │ │ │ └── filters
│ │ │ │ │ │ │ │ │ └── k:9 = 1
│ │ │ │ │ │ │ │ └── filters (true)
│ │ │ │ │ │ │ └── projections
│ │ │ │ │ │ │ └── ((column1:6, column2:7, CAST(NULL AS INT8)) AS k, a, b) [as=new:14]
│ │ │ │ │ │ └── projections
│ │ │ │ │ │ └── f154672(new:14, NULL, 'tr154672', 'BEFORE', 'ROW', 'INSERT', 61, 't154672', 't154672', 'public', 0, ARRAY[]) [as=f154672:28]
│ │ │ │ │ └── filters
│ │ │ │ │ └── f154672:28 IS DISTINCT FROM NULL
│ │ │ │ └── projections
│ │ │ │ ├── ((k:9, 3, CAST(NULL AS INT8)) AS k, a, b) [as=new:35]
│ │ │ │ ├── ((k:9, a:10, CAST(NULL AS INT8)) AS k, a, b) [as=old:34]
│ │ │ │ ├── 4 [as=b_comp:33]
│ │ │ │ ├── 3 [as=a_new:32]
│ │ │ │ ├── a:10 + 1 [as=b_comp:31]
│ │ │ │ ├── (f154672:28).k [as=k_new:29]
│ │ │ │ └── (f154672:28).a [as=a_new:30]
│ │ │ └── projections
│ │ │ └── CASE WHEN k:9 IS NOT NULL THEN f154672(new:35, old:34, 'tr154672', 'BEFORE', 'ROW', 'UPDATE', 61, 't154672', 't154672', 'public', 0, ARRAY[]) ELSE new:35 END [as=f154672:36]
│ │ └── filters
│ │ └── f154672:36 IS DISTINCT FROM NULL
│ └── projections
│ ├── (f154672:36).k [as=k_new:37]
│ └── (f154672:36).a [as=a_new:38]
└── projections
├── CASE WHEN k:9 IS NULL THEN k_new:29 ELSE k_new:37 END [as=upsert_k:40]
├── CASE WHEN k:9 IS NULL THEN a_new:30 ELSE a_new:38 END [as=upsert_a:41]
└── CASE WHEN k:9 IS NULL THEN b_comp:31 ELSE a_new:38 + 1 END [as=upsert_b:42]
2 changes: 1 addition & 1 deletion pkg/sql/opt/optbuilder/trigger.go
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Expand Up @@ -373,7 +373,7 @@ func (mb *mutationBuilder) recomputeComputedColsForTrigger(eventType tree.Trigge
colIDs[i] = 0
}
}
mb.addSynthesizedComputedCols(colIDs, false /* restrict */)
_ = mb.projectSynthesizedComputedCols(colIDs, false /* restrict */)
}

// ============================================================================
Expand Down