anchovYu commented on code in PR #39040:
URL: https://github.com/apache/spark/pull/39040#discussion_r1053617144
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/ResolveLateralColumnAlias.scala:
##########
@@ -244,6 +303,61 @@ object ResolveLateralColumnAliasReference extends
Rule[LogicalPlan] {
child = Project(innerProjectList.toSeq, child)
)
}
+
+ case agg @ Aggregate(groupingExpressions, aggregateExpressions, _) if
agg.resolved
+ &&
aggregateExpressions.exists(_.containsPattern(LATERAL_COLUMN_ALIAS_REFERENCE))
=>
+
+ // Check if current Aggregate is eligible to lift up with Project:
the aggregate
+ // expression only contains: 1) aggregate functions, 2) grouping
expressions, 3) lateral
+ // column alias reference or 4) literals.
+ // This check is to prevent unnecessary transformation on invalid
plan, to guarantee it
+ // throws the same exception. For example, cases like non-aggregate
expressions not
+ // in group by, once transformed, will throw a different exception:
missing input.
+ def eligibleToLiftUp(exp: Expression): Boolean = {
+ exp match {
+ case e: AggregateExpression if
AggregateExpression.isAggregate(e) => true
Review Comment:
oops, thanks.
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