[jira] [Updated] (HIVE-12877) Hive use index for queries will lose some data if the Query file is compressed.

["yangfang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-12877?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

yangfang updated HIVE-12877:
----------------------------
    Attachment: 19-index_compressed_file.gz
                index_query_compressed_file_failure.q
                HIVE-12877.1.patch

> Hive use index for queries will lose some data if the Query file is compressed.
> -------------------------------------------------------------------------------
>
>                 Key: HIVE-12877
>                 URL: https://issues.apache.org/jira/browse/HIVE-12877
>             Project: Hive
>          Issue Type: Bug
>          Components: Indexing
>    Affects Versions: 1.2.1
>         Environment: This problem exists in all Hive versions.no matter what platform
>            Reporter: yangfang
>         Attachments: 19-index_compressed_file.gz, HIVE-12877.1.patch, HIVE-12877.patch, index_query_compressed_file_failure.q
>
>
> Hive created the index using the extracted file length when the file is  the compressed,
> but when to divide the data into pieces in MapReduce,Hive use the file length to compare with the extracted file length,if
> If it found that these two lengths are not matched, It filters out the file.So the query will lose some data.
> I modified the source code and make hive index can be used when the files is compressed,please test it.



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