Github user ash211 commented on a diff in the pull request:
https://github.com/apache/spark/pull/15835#discussion_r87703118
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetQuerySuite.scala
---
@@ -703,6 +705,81 @@ class ParquetQuerySuite extends QueryTest with
ParquetTest with SharedSQLContext
}
}
}
+
+ test("SPARK-17059: Allow FileFormat to specify partition pruning
strategy") {
+ withSQLConf(ParquetOutputFormat.ENABLE_JOB_SUMMARY -> "true") {
+ withTempPath { path =>
+ spark.sparkContext.parallelize(Seq(1, 2, 3), 3)
+ .toDF("x").write.parquet(path.getCanonicalPath)
+
+ val zeroPartitions =
spark.read.parquet(path.getCanonicalPath).where("x = 0")
+ assert(zeroPartitions.rdd.partitions.length == 0)
+
+ val onePartition =
spark.read.parquet(path.getCanonicalPath).where("x = 1")
+ assert(onePartition.rdd.partitions.length == 1)
+ }
+ }
+ }
+
+ test("Do not filter out parquet file when missing in _metadata file") {
+ withSQLConf(ParquetOutputFormat.ENABLE_JOB_SUMMARY -> "true") {
+ withTempPath { path =>
+ spark.sparkContext.parallelize(Seq(1, 2, 3), 3)
+ .toDF("x").write.parquet(path.getCanonicalPath)
+ spark.sparkContext.parallelize(Seq(4))
+
.toDF("x").write.mode(SaveMode.Append).parquet(path.getCanonicalPath)
--- End diff --
do you need to turn off `ParquetOutputFormat.ENABLE_JOB_SUMMARY` to prevent
the `_metadata` file from being updated on the second write, or is it normally
not updated in `SaveMode.Append` ?
I would've expected the second write here to update the `_metadata` file in
which case the test name wouldn't match the behavior. But if the second write
_doesn't_ update `_metadata` then the file has 3 out of 4 file partitions in
it, matching the test name.
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