[SPARK-5465] [SQL] Fixes filter push-down for Parquet data source

Not all Catalyst filter expressions can be converted to Parquet filter predicates. We should try to convert each individual predicate and then collect those convertible ones.

<!-- Reviewable:start -->
[<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/apache/spark/4255)
<!-- Reviewable:end -->

Author: Cheng Lian <[email protected]>

Closes apache#4255 from liancheng/spark-5465 and squashes the following commits:

14ccd37 [Cheng Lian] Fixes filter push-down for Parquet data source

sql/core/src/main/scala/org/apache/spark/sql/parquet/newParquet.scala

@@ -20,26 +20,26 @@ import java.util.{List => JList}
 
 import scala.collection.JavaConversions._
 
-import org.apache.hadoop.fs.{FileStatus, FileSystem, Path}
 import org.apache.hadoop.conf.{Configurable, Configuration}
+import org.apache.hadoop.fs.{FileStatus, FileSystem, Path}
 import org.apache.hadoop.io.Writable
-import org.apache.hadoop.mapreduce.{JobContext, InputSplit, Job}
-
+import org.apache.hadoop.mapreduce.{InputSplit, Job, JobContext}
+import parquet.filter2.predicate.FilterApi
 import parquet.hadoop.ParquetInputFormat
 import parquet.hadoop.util.ContextUtil
 
 import org.apache.spark.annotation.DeveloperApi
-import org.apache.spark.{Partition => SparkPartition, Logging}
 import org.apache.spark.rdd.{NewHadoopPartition, RDD}
-import org.apache.spark.sql.{SQLConf, Row, SQLContext}
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.sources._
 import org.apache.spark.sql.types.{IntegerType, StructField, StructType}
+import org.apache.spark.sql.{Row, SQLConf, SQLContext}
+import org.apache.spark.{Logging, Partition => SparkPartition}
 
 
 /**
  * Allows creation of parquet based tables using the syntax
- * `CREATE TEMPORARY TABLE ... USING org.apache.spark.sql.parquet`.  Currently the only option 
+ * `CREATE TEMPORARY TABLE ... USING org.apache.spark.sql.parquet`.  Currently the only option
  * required is `path`, which should be the location of a collection of, optionally partitioned,
  * parquet files.
  */
@@ -193,10 +193,12 @@ case class ParquetRelation2(path: String)(@transient val sqlContext: SQLContext)
       org.apache.hadoop.mapreduce.lib.input.FileInputFormat.setInputPaths(job, selectedFiles: _*)
     }
 
-    // Push down filters when possible
+    // Push down filters when possible. Notice that not all filters can be converted to Parquet
+    // filter predicate. Here we try to convert each individual predicate and only collect those
+    // convertible ones.
     predicates
-      .reduceOption(And)
       .flatMap(ParquetFilters.createFilter)
+      .reduceOption(FilterApi.and)
       .filter(_ => sqlContext.conf.parquetFilterPushDown)
       .foreach(ParquetInputFormat.setFilterPredicate(jobConf, _))