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From "Lefty Leverenz (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-12439) CompactionTxnHandler.markCleaned() and TxnHandler.openTxns() misc improvements
Date Tue, 26 Apr 2016 01:19:13 GMT

    [ https://issues.apache.org/jira/browse/HIVE-12439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15257385#comment-15257385
] 

Lefty Leverenz commented on HIVE-12439:
---------------------------------------

Doc done:  [~sladymon] documented the new configuration parameters in the MetaStore section
(right after *hive.metastore.try.direct.sql.ddl*) with help from [~sushanth].  Thanks, Shannon
and Sushanth!

I optimistically removed the TODOC1.3 and TODOC2.1 labels although review comments are still
welcome.

* [hive.direct.sql.max.query.length | https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.direct.sql.max.query.length]
* [hive.direct.sql.max.elements.in.clause | https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.direct.sql.max.elements.in.clause]
* [hive.direct.sql.max.elements.values.clause | https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.direct.sql.max.elements.values.clause]

> CompactionTxnHandler.markCleaned() and TxnHandler.openTxns() misc improvements
> ------------------------------------------------------------------------------
>
>                 Key: HIVE-12439
>                 URL: https://issues.apache.org/jira/browse/HIVE-12439
>             Project: Hive
>          Issue Type: Improvement
>          Components: Metastore, Transactions
>    Affects Versions: 1.0.0
>            Reporter: Eugene Koifman
>            Assignee: Wei Zheng
>             Fix For: 1.3.0, 2.1.0
>
>         Attachments: HIVE-12439.1.patch, HIVE-12439.2.patch, HIVE-12439.3.patch
>
>
> # add a safeguard to make sure IN clause is not too large; break up by txn id to delete
from TXN_COMPONENTS where tc_txnid in ...
> # TxnHandler. openTxns() - use 1 insert with many rows in values() clause, rather than
1 DB roundtrip per row



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