Hey,
I'm pretty sure that Iterator.remove() will be local only and not
actually affect HBase.
But yes it is safe. If you delete a row you just scanned, since the
scanner will be past the row in question, thus it is safe to delete
it. And even if you deleted a row you were just about to see, you'd
just end up skipping that row.
-ryan
On Wed, Mar 24, 2010 at 10:12 AM, Jeyendran Balakrishnan
<jbalakrish...@docomolabs-usa.com> wrote:
> Hi,
>
> I am running a scanner on a HBase table.
> After getting each row, and using the data, I want to delete the row.
> Is it safe to do so from inside the scanner loop?
>
> And if so, what is the best way to delete the row?:
> * Using HTable.deleteAll()
> or
> * Using Iterator.remove()
>
> My use case is something like this [I am using HBase 19.3, please don't
> kill me :-)]:
>
> HTable table = ...;
> Scanner scanner = table.getScanner(...);
>
> try
> {
> Iterable<RowResult> I = scanner.iterator();
> while (I.hasNext())
> {
> RowResult result = I.next();
>
> // Do something with result:
> // ....
>
> // Now delete the row
>
> // HTable approach
> byte[] rowKeyBytes = result.getRow();
> table.deleteAll(rowKeyBytes);
>
> // OR Iterator.remove() approach:
> //I.remove();
> }
> }
> finally
> {
> if (scanner != null)
> scanner.close();
> }
>
> Thanks a lot,
> jp
>
>
