Github user dongjoon-hyun commented on a diff in the pull request:
https://github.com/apache/spark/pull/12312#discussion_r59764270
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
---
@@ -519,22 +519,28 @@ object LikeSimplification extends Rule[LogicalPlan] {
// Cases like "something\%" are not optimized, but this does not affect
correctness.
private val startsWith = "([^_%]+)%".r
private val endsWith = "%([^_%]+)".r
+ private val startsAndEndsWith = "([^_%]+)%([^_%]+)".r
private val contains = "%([^_%]+)%".r
private val equalTo = "([^_%]*)".r
def apply(plan: LogicalPlan): LogicalPlan = plan transformAllExpressions
{
- case Like(l, Literal(utf, StringType)) =>
- utf.toString match {
- case startsWith(pattern) if !pattern.endsWith("\\") =>
- StartsWith(l, Literal(pattern))
- case endsWith(pattern) =>
- EndsWith(l, Literal(pattern))
- case contains(pattern) if !pattern.endsWith("\\") =>
- Contains(l, Literal(pattern))
- case equalTo(pattern) =>
- EqualTo(l, Literal(pattern))
+ case Like(l, Literal(pattern, StringType)) =>
--- End diff --
You're welcome. :) I'll fix right now!
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