dongjoon-hyun commented on a change in pull request #28232:
[SPARK-31459][SQL]fix insert overwrite directory target path is an existing file
URL: https://github.com/apache/spark/pull/28232#discussion_r410597334
##########
File path:
sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/InsertIntoHiveDirCommand.scala
##########
@@ -90,6 +90,18 @@ case class InsertIntoHiveDirCommand(
val dfs = qualifiedPath.getFileSystem(hadoopConf)
(qualifiedPath, dfs)
}
+
+ // SPARK-31459: If the target path already exists as a file,
+ // the last rename operation will cause only one result file to be moved,
+ // resulting in incorrect results.
+ if (fs.isFile(writeToPath)) {
+ if (overwrite) {
+ fs.delete(writeToPath, true)
Review comment:
`fs.delete` can fail if Apache Spark don't have enough privileges.
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