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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (HBASE-6244) [REST] Result generators do not need to query table schema
Date Fri, 12 Oct 2012 05:38:40 GMT

     [ https://issues.apache.org/jira/browse/HBASE-6244?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lars Hofhansl closed HBASE-6244.
--------------------------------

    
> [REST] Result generators do not need to query table schema
> ----------------------------------------------------------
>
>                 Key: HBASE-6244
>                 URL: https://issues.apache.org/jira/browse/HBASE-6244
>             Project: HBase
>          Issue Type: Improvement
>          Components: REST
>    Affects Versions: 0.92.2, 0.94.1, 0.96.0
>            Reporter: ShiXing
>            Assignee: Andrew Purtell
>            Priority: Minor
>             Fix For: 0.92.2, 0.94.1, 0.96.0
>
>         Attachments: 6244-0.94.patch, 6244.patch
>
>
> Now, the RowResultGenerator and the ScanerResultGenerator will fit the column family
if the request doesn't contain any column info. 
> {code}
>       if (rowspec.hasColumns()) {
>         //addColumn for get or scan
>       } else {
>         for (HColumnDescriptor family: 
>             table.getTableDescriptor().getFamilies()) {
>           scan/get.addFamily(family.getName());
>         }
>       }
> {code}
> The table.getTableDescriptor() will cost 10+ milliseconds in our hbase cluster each request.
We can remove these code because the server will auto add the columns.

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