cloud-fan commented on code in PR #36417:
URL: https://github.com/apache/spark/pull/36417#discussion_r866548301
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala:
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@@ -1871,14 +1871,12 @@ object EliminateLimits extends Rule[LogicalPlan] {
}
/**
- * Rewrite [[Offset]] as [[GlobalLimitAndOffset]] or [[LocalLimit]],
- * merging the expressions into one single expression. See [[Limit]] for more
information
- * about the difference between [[LocalLimit]] and [[GlobalLimit]].
+ * Rewrite [[Offset]] by eliminate [[Offset]] or merge offset value and limit
value into
+ * [[LocalLimit]]. See [[Limit]] for more information about the difference
between
+ * [[LocalLimit]] and [[GlobalLimit]].
*/
object RewriteOffsets extends Rule[LogicalPlan] {
def apply(plan: LogicalPlan): LogicalPlan = plan transform {
- case GlobalLimit(le, Offset(oe, grandChild)) =>
- GlobalLimitAndOffset(le, oe, grandChild)
case localLimit @ LocalLimit(le, Offset(oe, grandChild)) =>
Review Comment:
can we move this logic to `LimitPushDown`? then we don't need this rule.
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