Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/1147#discussion_r14051261
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/planning/patterns.scala
---
@@ -25,26 +25,6 @@ import org.apache.spark.sql.catalyst.expressions._
import org.apache.spark.sql.catalyst.plans._
import org.apache.spark.sql.catalyst.plans.logical._
-/**
- * A pattern that matches any number of filter operations on top of
another relational operator.
- * Adjacent filter operators are collected and their conditions are broken
up and returned as a
- * sequence of conjunctive predicates.
- *
- * @return A tuple containing a sequence of conjunctive predicates that
should be used to filter the
- * output and a relational operator.
- */
-object FilteredOperation extends PredicateHelper {
--- End diff --
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