rahij commented on a change in pull request #25928: [SPARK-29259][SQL] call
fs.exists only when necessary
URL: https://github.com/apache/spark/pull/25928#discussion_r328699411
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/InsertIntoHadoopFsRelationCommand.scala
##########
@@ -111,25 +109,30 @@ case class InsertIntoHadoopFsRelationCommand(
outputPath = outputPath.toString,
dynamicPartitionOverwrite = dynamicPartitionOverwrite)
- val doInsertion = (mode, pathExists) match {
- case (SaveMode.ErrorIfExists, true) =>
- throw new AnalysisException(s"path $qualifiedOutputPath already
exists.")
- case (SaveMode.Overwrite, true) =>
- if (ifPartitionNotExists && matchingPartitions.nonEmpty) {
- false
- } else if (dynamicPartitionOverwrite) {
- // For dynamic partition overwrite, do not delete partition
directories ahead.
- true
- } else {
- deleteMatchingPartitions(fs, qualifiedOutputPath,
customPartitionLocations, committer)
+ val doInsertion = if (mode == SaveMode.Append) {
+ true
+ } else {
+ val pathExists = fs.exists(qualifiedOutputPath)
+ (mode, pathExists) match {
+ case (SaveMode.ErrorIfExists, true) =>
+ throw new AnalysisException(s"path $qualifiedOutputPath already
exists.")
+ case (SaveMode.Overwrite, true) =>
+ if (ifPartitionNotExists && matchingPartitions.nonEmpty) {
+ false
+ } else if (dynamicPartitionOverwrite) {
+ // For dynamic partition overwrite, do not delete partition
directories ahead.
+ true
+ } else {
+ deleteMatchingPartitions(fs, qualifiedOutputPath,
customPartitionLocations, committer)
+ true
+ }
+ case (SaveMode.Overwrite, _) | (SaveMode.ErrorIfExists, false) =>
Review comment:
@viirya I just kept the existing code for these since I didn't want to make
unnecessary changes.
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