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Posted to dev@hive.apache.org by "Manuel Meßner (JIRA)" <ji...@apache.org> on 2015/02/06 09:19:34 UTC
[jira] [Updated] (HIVE-9595) Test whether schema evolution using
parquet is possible
[ https://issues.apache.org/jira/browse/HIVE-9595?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Manuel Meßner updated HIVE-9595:
--------------------------------
Affects Version/s: 0.13.1
Status: Patch Available (was: Open)
> 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: 0.13.1
> Reporter: Manuel Meßner
> Priority: Trivial
>
> 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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