AngersZhuuuu commented on a change in pull request #29087:
URL: https://github.com/apache/spark/pull/29087#discussion_r551668237
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
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@@ -659,12 +669,39 @@ class AstBuilder extends SqlBaseBaseVisitor[AnyRef] with
SQLConfHelper with Logg
AttributeReference("value", StringType)()), true)
}
+ val namedExpressions = expressions.map {
+ case e: NamedExpression => e
+ case e: Expression => UnresolvedAlias(e)
+ }
+
+ def createProject() = if (namedExpressions.nonEmpty) {
+ Project(namedExpressions, withFilter)
+ } else {
+ withFilter
+ }
+
+ val withProject = if (aggregationClause == null && havingClause != null) {
+ if (conf.getConf(SQLConf.LEGACY_HAVING_WITHOUT_GROUP_BY_AS_WHERE)) {
+ // If the legacy conf is set, treat HAVING without GROUP BY as WHERE.
+ withHavingClause(havingClause, createProject())
+ } else {
+ // According to SQL standard, HAVING without GROUP BY means global
aggregate.
+ withHavingClause(havingClause, Aggregate(Nil, namedExpressions,
withFilter))
+ }
+ } else if (aggregationClause != null) {
+ val aggregate = withAggregationClause(aggregationClause,
namedExpressions, withFilter)
+ aggregate.optionalMap(havingClause)(withHavingClause)
+ } else {
+ // When hitting this branch, `having` must be null.
+ createProject()
+ }
Review comment:
> Is this part just copied from `withSelectQuerySpecification`? If so,
could you share it between `withSelectQuerySpecification` and
`withTransformQuerySpecification`?
Done
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