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From gatorsmile <...@git.apache.org>
Subject [GitHub] spark pull request #16700: [SPARK-19359][SQL]clear useless path after rename...
Date Fri, 27 Jan 2017 02:03:56 GMT
Github user gatorsmile commented on a diff in the pull request:

    https://github.com/apache/spark/pull/16700#discussion_r98134168
  
    --- Diff: sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveExternalCatalog.scala
---
    @@ -899,6 +918,22 @@ private[spark] class HiveExternalCatalog(conf: SparkConf, hadoopConf:
Configurat
               spec, partitionColumnNames, tablePath)
             try {
               tablePath.getFileSystem(hadoopConf).rename(wrongPath, rightPath)
    +
    +          // If the newSpec contains more than one depth partition, FileSystem.rename
just deletes
    +          // the leaf(i.e. wrongPath), we should check if wrongPath's parents need to
be deleted.
    +          // for example:
    +          // newSpec is 'A=1/B=2', after renamePartitions by Hive, the location path
in FileSystem
    +          // is changed to 'a=1/b=2', which is wrongPath, then we renamed to 'A=1/B=2',
and
    +          // 'a=1/b=2' in FileSystem is deleted, while 'a=1' is already exists,
    +          // which should also be deleted
    --- End diff --
    
    How about?
    > For example, give a newSpec 'A=1/B=2', after calling Hive's client.renamePartitions,
the location path in FileSystem is changed to 'a=1/b=2', which is wrongPath. Then, although
we renamed it to 'A=1/B=2', 'a=1/b=2' in FileSystem is deleted but 'a=1' still exists. We
also need to delete the useless directory.



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