Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/14660#discussion_r75464633
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala ---
@@ -243,6 +243,14 @@ object SQLConf {
.booleanConf
.createWithDefault(true)
+ val PARQUET_READ_SCHEMA_LOCAL_THRESHOLD =
+ SQLConfigBuilder("spark.sql.parquet.readSchemaLocalThreshold")
+ .doc("Configures the maximum number of files to allow reading schema
in driver-side. " +
+ "If the number of files exceeds this value, then schemas will be
read then in parallel " +
+ "via another Spark distributed job.")
+ .intConf
+ .createWithDefault(32)
--- End diff --
I increased this to 32 identical with
`spark.sql.sources.parallelPartitionDiscovery.threshold` because it seems this
option is pretty similar with this.
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