EnricoMi commented on code in PR #37407:
URL: https://github.com/apache/spark/pull/37407#discussion_r988687537
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala:
##########
@@ -869,26 +869,52 @@ class Analyzer(override val catalogManager:
CatalogManager)
def apply(plan: LogicalPlan): LogicalPlan =
plan.resolveOperatorsWithPruning(
_.containsPattern(UNPIVOT), ruleId) {
- // once children and ids are resolved, we can determine values, if non
were given
- case up: Unpivot if up.childrenResolved && up.ids.forall(_.resolved) &&
up.values.isEmpty =>
- up.copy(values = up.child.output.diff(up.ids))
-
- case up: Unpivot if !up.childrenResolved || !up.ids.forall(_.resolved) ||
- up.values.isEmpty || !up.values.forall(_.resolved) ||
!up.valuesTypeCoercioned => up
+ // once children are resolved, we can determine values from ids and vice
versa
+ // if only either is given, and only AttributeReference are given
+ case up @Unpivot(Some(ids), None, _, _, _, _) if up.childrenResolved &&
Review Comment:
fixed
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala:
##########
@@ -869,26 +869,52 @@ class Analyzer(override val catalogManager:
CatalogManager)
def apply(plan: LogicalPlan): LogicalPlan =
plan.resolveOperatorsWithPruning(
_.containsPattern(UNPIVOT), ruleId) {
- // once children and ids are resolved, we can determine values, if non
were given
- case up: Unpivot if up.childrenResolved && up.ids.forall(_.resolved) &&
up.values.isEmpty =>
- up.copy(values = up.child.output.diff(up.ids))
-
- case up: Unpivot if !up.childrenResolved || !up.ids.forall(_.resolved) ||
- up.values.isEmpty || !up.values.forall(_.resolved) ||
!up.valuesTypeCoercioned => up
+ // once children are resolved, we can determine values from ids and vice
versa
+ // if only either is given, and only AttributeReference are given
+ case up @Unpivot(Some(ids), None, _, _, _, _) if up.childrenResolved &&
+ ids.forall(_.resolved) &&
+ ids.forall(_.isInstanceOf[AttributeReference]) =>
+ val idAttrs = AttributeSet(up.ids.get)
+ val values = up.child.output.filterNot(idAttrs.contains)
+ up.copy(values = Some(values.map(Seq(_))))
+ case up @Unpivot(None, Some(values), _, _, _, _) if up.childrenResolved
&&
Review Comment:
fixed
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