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https://issues.apache.org/jira/browse/HIVE-7509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14174761#comment-14174761
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Lefty Leverenz commented on HIVE-7509:
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Good docs [~prasanth_j]. I added some links and included CONCATENATE in the
ORC doc:
* [ORC -- HiveQLSyntax |
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+ORC#LanguageManualORC-HiveQLSyntax]
Question: In the wiki's description of *hive.merge.orcfile.stripe.level* you
added another parameter that isn't mentioned in HiveConf.java: "When
hive.merge.mapfiles, hive.merge.mapredfiles or hive.merge.tezfiles is enabled"
(tezfiles is the new one). Should I make that change in HiveConf along with
the other fixes in HIVE-6586?
* [Configuration Properties -- hive.merge.orcfile.stripe.level |
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.merge.orcfile.stripe.level]
> Fast stripe level merging for ORC
> ---------------------------------
>
> Key: HIVE-7509
> URL: https://issues.apache.org/jira/browse/HIVE-7509
> Project: Hive
> Issue Type: Bug
> Affects Versions: 0.14.0
> Reporter: Prasanth J
> Assignee: Prasanth J
> Labels: orcfile
> Fix For: 0.14.0
>
> Attachments: HIVE-7509.1.patch, HIVE-7509.2.patch, HIVE-7509.3.patch,
> HIVE-7509.4.patch, HIVE-7509.5.patch
>
>
> Similar to HIVE-1950, add support for fast stripe level merging of ORC files
> through CONCATENATE command and conditional merge task. This fast merging is
> ideal for merging many small ORC files to a larger file without decompressing
> and decoding the data of small orc files.
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