beliefer commented on a change in pull request #26656: [SPARK-27986][SQL]
Support ANSI SQL filter clause for aggregate expression
URL: https://github.com/apache/spark/pull/26656#discussion_r355829918
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
##########
@@ -1636,26 +1636,33 @@ class Analyzer(
s"its class is ${other.getClass.getCanonicalName}, which
is not a generator.")
}
}
- case u @ UnresolvedFunction(funcId, children, isDistinct) =>
+ case u @ UnresolvedFunction(funcId, arguments, isDistinct, filter) =>
withPosition(u) {
- v1SessionCatalog.lookupFunction(funcId, children) match {
+ v1SessionCatalog.lookupFunction(funcId, arguments) match {
// AggregateWindowFunctions are AggregateFunctions that can
only be evaluated within
// the context of a Window clause. They do not need to be
wrapped in an
// AggregateExpression.
case wf: AggregateWindowFunction =>
if (isDistinct) {
failAnalysis(
s"DISTINCT specified, but ${wf.prettyName} is not an
aggregate function")
+ } else if (filter.isDefined) {
Review comment:
OK.
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