Github user clockfly commented on a diff in the pull request:
https://github.com/apache/spark/pull/13749#discussion_r67597567
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSource.scala
---
@@ -435,26 +435,25 @@ case class DataSource(
// If we are appending to a table that already exists, make sure
the partitioning matches
// up. If we fail to load the table for whatever reason, ignore
the check.
if (mode == SaveMode.Append) {
- val existingPartitionColumnSet = try {
- Some(
- resolveRelation()
- .asInstanceOf[HadoopFsRelation]
- .location
- .partitionSpec()
- .partitionColumns
- .fieldNames
- .toSet)
- } catch {
- case e: Exception =>
- None
- }
-
- existingPartitionColumnSet.foreach { ex =>
- if (ex.map(_.toLowerCase) !=
partitionColumns.map(_.toLowerCase()).toSet) {
- throw new AnalysisException(
- s"Requested partitioning does not equal existing
partitioning: " +
- s"$ex != ${partitionColumns.toSet}.")
- }
+ val existingColumns = Try {
+ resolveRelation()
+ .asInstanceOf[HadoopFsRelation]
+ .location
+ .partitionSpec()
+ .partitionColumns
+ .fieldNames
+ .toSeq
+ }.getOrElse(Seq.empty[String])
+ val sameColumns =
+ existingColumns.map(_.toLowerCase) ==
partitionColumns.map(_.toLowerCase)
+ if (existingColumns.size > 0 && !sameColumns) {
+ throw new AnalysisException(
+ s"""Requested partitioning does not match existing
partitioning.
--- End diff --
Thanks, updated
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