gengliangwang commented on a change in pull request #24271: [SPAR-27342][SQL]
Optimize Limit 0 queries
URL: https://github.com/apache/spark/pull/24271#discussion_r272032794
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
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@@ -172,6 +172,8 @@ abstract class Optimizer(sessionCatalog: SessionCatalog)
// optimizer rules that are triggered when there is a filter
// (e.g. InferFiltersFromConstraints). If we run this batch earlier, the
query becomes just
// LocalRelation and does not trigger many rules.
Review comment:
The comment should be before the batch `LocalRelation early`.
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