AssHero opened a new pull request, #2823:
URL: https://github.com/apache/arrow-datafusion/pull/2823
# Which issue does this PR close?
Closes #2822
# Rationale for this change
For logical plans, if upper offset is equal or greater than current's limit,
replaces with an [LogicalPlan::EmptyRelation].
For this query: select * from (select * from t1 limit 2 offset 2 ) a order
by a.column1 offset 2, we get
the Logical Plan:
----------------Limit: skip=2, fetch=None
-----------------Sort: #a.column1 ASC NULLS LAST
-------------------Projection: #a.column1
---------------------EmptyRelation
# What changes are included in this PR?
add rules to eliminate multi limit-offset nodes to emptyRelation in
datafusion/optimizer/src/eliminate_limit.rs
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