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Posted to dev@hive.apache.org by "Edward Capriolo (JIRA)" <ji...@apache.org> on 2010/12/25 00:00:54 UTC
[jira] Resolved: (HIVE-1815) The class HiveResultSet should
implement batch fetching.
[ https://issues.apache.org/jira/browse/HIVE-1815?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Edward Capriolo resolved HIVE-1815.
-----------------------------------
Resolution: Won't Fix
Fix Version/s: 0.6.0
This is implemented
vi service/if/hive_service.thrift
# Fetch a given number of rows or remaining number of
# rows whichever is smaller.
list<string> fetchN(1:i32 numRows) throws(1:HiveServerException ex)
Please be sure when filing jira issues to be using trunk or the most recent release. Also I am fairly sure fetchn was a part of the hive server since the get go.
> The class HiveResultSet should implement batch fetching.
> --------------------------------------------------------
>
> Key: HIVE-1815
> URL: https://issues.apache.org/jira/browse/HIVE-1815
> Project: Hive
> Issue Type: Improvement
> Components: Drivers
> Affects Versions: 0.5.0
> Environment: Custom Java application using the Hive JDBC driver to connect to a Hive server, execute a Hive query and process the results.
> Reporter: Guy le Mar
> Fix For: 0.6.0
>
>
> When using the Hive JDBC driver, you can execute a Hive query and obtain a HiveResultSet instance that contains the results of the query.
> Unfortunately, HiveResultSet can then only fetch a single row of these results from the Hive server at a time. As a consequence, it's extremely slow to fetch a resultset of anything other than a trivial size.
> It would be nice for the HiveResultSet to be able to fetch N rows from the server at a time, so that performance is suitable to support applications that provide human interaction.
> (From memory, I think it took me around 20 minutes to fetch 4000 rows.)
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