Github user wangyum commented on a diff in the pull request:
https://github.com/apache/spark/pull/23004#discussion_r233272718
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/InMemoryTableScanExec.scala
---
@@ -237,6 +237,13 @@ case class InMemoryTableScanExec(
if list.forall(ExtractableLiteral.unapply(_).isDefined) &&
list.nonEmpty =>
list.map(l => statsFor(a).lowerBound <= l.asInstanceOf[Literal] &&
l.asInstanceOf[Literal] <= statsFor(a).upperBound).reduce(_ || _)
+
+ case StartsWith(a: AttributeReference, ExtractableLiteral(l)) =>
+ statsFor(a).lowerBound.substr(0, Length(l)) <= l &&
+ l <= statsFor(a).upperBound.substr(0, Length(l))
+ case StartsWith(ExtractableLiteral(l), a: AttributeReference) =>
--- End diff --
Good question, The last one should be removed, `DataSourceStrategy` has the
same logic:
https://github.com/apache/spark/blob/3d6b68b030ee85a0f639dd8e9b68aedf5f27b46f/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala#L512-L513
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