Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/511#discussion_r12010474
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/parquet/ParquetTableOperations.scala
---
@@ -46,7 +47,7 @@ case class ParquetTableScan(
// https://issues.apache.org/jira/browse/SPARK-1367
output: Seq[Attribute],
relation: ParquetRelation,
- columnPruningPred: Option[Expression])(
+ columnPruningPred: Option[Seq[Expression]])(
--- End diff --
Why have an `Option[Seq[...]]` when option is just a special `Seq` that has
0 or 1 elements? Can we just model the `None` case with an empty Seq?
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