Github user jiangxb1987 commented on a diff in the pull request:
https://github.com/apache/spark/pull/20345#discussion_r163114625
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/JoinOptimizationSuite.scala
---
@@ -46,6 +46,19 @@ class JoinOptimizationSuite extends PlanTest {
val testRelation = LocalRelation('a.int, 'b.int, 'c.int)
val testRelation1 = LocalRelation('d.int)
+ def testExtractInnerJoins
--- End diff --
nit: `def testExtractInnerJoins(
plan: LogicalPlan,
expected: Option[(Seq[(LogicalPlan, InnerLike)], Seq[Expression])]) {`
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