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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2010/09/02 00:16:53 UTC

[jira] Commented: (HBASE-2857) HBaseAdmin.tableExists() should not require a full meta scan

    [ https://issues.apache.org/jira/browse/HBASE-2857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12905254#action_12905254 ] 

stack commented on HBASE-2857:
------------------------------

There are tests for listTable and tableExists in TestAdmin.  They pass.  Going to commit.

> HBaseAdmin.tableExists() should not require a full meta scan
> ------------------------------------------------------------
>
>                 Key: HBASE-2857
>                 URL: https://issues.apache.org/jira/browse/HBASE-2857
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Jonathan Gray
>             Fix For: 0.90.0
>
>         Attachments: 2857.txt
>
>
> HBaseAdmin.tableExists() actually makes a call to HBaseAdmin.listTables() and then checks if the table you are looking for is in the list.
> listTables() uses a MetaScanner/MetaVisitor, thus requiring an entire META table scan.
> We should not require a full META scan to check for the existence of a single table.

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