Github user robert3005 commented on a diff in the pull request:
https://github.com/apache/spark/pull/14615#discussion_r74788858
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JsonFileFormat.scala
---
@@ -84,7 +84,7 @@ class JsonFileFormat extends TextBasedFileFormat with
DataSourceRegister {
bucketId: Option[Int],
dataSchema: StructType,
context: TaskAttemptContext): OutputWriter = {
- new JsonOutputWriter(path, bucketId, dataSchema, context)
+ new JsonOutputWriter(path, bucketId, new
JacksonGenerator(dataSchema)(_), context)
--- End diff --
I thought it made more sense to apply the schema early since it's immutable
over whole dataset while the writer is per partition. As you see in the
JsonOutputWriter the writer is applied there. Not sure if this makes difference
from perf point but it makes structure clearer (at least in my mind)
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