viirya commented on a change in pull request #26956: [SPARK-30312][SQL]
Preserve path permission and acl when truncate table
URL: https://github.com/apache/spark/pull/26956#discussion_r362675581
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/tables.scala
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@@ -499,8 +499,35 @@ case class TruncateTableCommand(
val path = new Path(location.get)
try {
val fs = path.getFileSystem(hadoopConf)
+ val fileStatus = fs.getFileStatus(path)
+ // Not all fs impl. support these APIs.
+ val optPermission = Try(fileStatus.getPermission())
+ val optAcls = Try(fs.getAclStatus(path).getEntries)
+
fs.delete(path, true)
Review comment:
In Presto, looks like it takes the approach by listing all files/directories
under the path to delete (i.e., `rm -rf tablePath/*`), and recursively deleting
them:
https://github.com/prestodb/presto/blob/9c21aaa659f9d4927fe12bec4b8015c8cbf4722e/presto-hive-metastore/src/main/java/com/facebook/presto/hive/metastore/SemiTransactionalHiveMetastore.java#L485
https://github.com/prestodb/presto/blob/9c21aaa659f9d4927fe12bec4b8015c8cbf4722e/presto-hive-metastore/src/main/java/com/facebook/presto/hive/metastore/SemiTransactionalHiveMetastore.java#L1796
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