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From "Jakub Kukul (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-9595) Test whether schema evolution using parquet is possible
Date Mon, 14 Sep 2015 12:44:45 GMT

     [ https://issues.apache.org/jira/browse/HIVE-9595?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jakub Kukul updated HIVE-9595:
------------------------------
    Affects Version/s: 1.1.0

> Test whether schema evolution using parquet is possible
> -------------------------------------------------------
>
>                 Key: HIVE-9595
>                 URL: https://issues.apache.org/jira/browse/HIVE-9595
>             Project: Hive
>          Issue Type: Test
>          Components: File Formats, Tests
>    Affects Versions: 0.14.0, 0.13.1, 1.0.0, 1.1.0
>            Reporter: Manuel Me├čner
>            Priority: Trivial
>         Attachments: HIVE-9595.01.patch, HIVE-9595.02.patch
>
>
> With https://issues.apache.org/jira/browse/HIVE-7554 a unfortunate else branch was introduced
to org.apache.hadoop.hive.ql.io.parquet.read.DataWritableReadSupport . That else branch fired
an exception in case the parquet file schema had less fields than the table schema. So adding
columns to a parquet backed table and query the added columns on old partitions wasn't possible
anymore. Which was very unfortunate for my team. https://issues.apache.org/jira/browse/HIVE-7800
fixed that, see point 3 in Daniel Weeks' comment https://issues.apache.org/jira/browse/HIVE-7800?focusedCommentId=14158594&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14158594
.
> However Hive-7800 did not introduce a test case for that. I'd love to see one.
> Best,
> Manuel



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