Github user ericl commented on a diff in the pull request:
https://github.com/apache/spark/pull/15998#discussion_r90092477
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveExternalCatalog.scala ---
@@ -922,6 +923,29 @@ private[spark] class HiveExternalCatalog(conf:
SparkConf, hadoopConf: Configurat
/**
* Returns the partition names from hive metastore for a given table in
a database.
*/
+ override def listPartitionNames(
+ db: String,
+ table: String,
+ partialSpec: Option[TablePartitionSpec] = None): Seq[String] =
withClient {
+ val actualPartColNames = getTable(db, table).partitionColumnNames
+ val clientPartitionNames =
+ client.getPartitionNames(db, table,
partialSpec.map(lowerCasePartitionSpec))
+
+ if (actualPartColNames.exists(partColName => partColName !=
partColName.toLowerCase)) {
+ clientPartitionNames.map { partName =>
+ val partSpec = PartitioningUtils.parsePathFragmentAsSeq(partName)
--- End diff --
That's correct. As of 2.1 we go through some extremes to preserve the case
of partition names by saving extra metadata inside the table storage
properties. When the table is resolved in `HiveExternalCatalog`, the lowercase
schema is reconciled with the saved original names.
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