[jira] Updated: (HBASE-655) need programmatic way to add column family: need programmatic way to enable/disable table

["stack (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-655?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

stack updated HBASE-655:
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isTableOffline should be easy enough to add.  Just scan META and return false as soon as it finds a region that is still onlined.  We should also add the inverse: isTableOnline.  Presence of these methods in API will also help convey the message that onlining/offlining is not synchronous.

Would suggest we add this utility in 0.2.

> need programmatic way to add column family: need programmatic way to enable/disable table
> -----------------------------------------------------------------------------------------
>
>                 Key: HBASE-655
>                 URL: https://issues.apache.org/jira/browse/HBASE-655
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: Michael Bieniosek
>             Fix For: 0.2.0
>
>
> From HADOOP-2292:
> > What you might do is open a HTable on the META region (HConstants.META_TABLE_NAME) and scan HConstants.COL_REGIONINFO_ARRAY which will give you back HRegionInfo objects (as bytes).
> > Find the table in question by comparing your table name to regionInfo.getTableDesc().getName()
> > If adding or deleting columns, check regionInfo.getTableDesc().hasFamily()
> > If changing table on/off line check regionInfo.isOffline()
> > If any of the regions don't meet the criteria, close the scanner, sleep and rescan.
> This is a bit too complicated for me.  If you won't make enableTable/disableTable synchronous, we should at least have a HTable.isTableDisabled method.

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