-Re: row count
David Medinets 2013-04-18, 01:43
Could you layer a scan time SummingCombiner on top of the
I don't know how to actually do this, but instinct says it should work and
significantly reduce the traffic back to the client.
On Wed, Apr 17, 2013 at 10:42 AM, Keith Turner <[EMAIL PROTECTED]> wrote:
> On Tue, Apr 16, 2013 at 9:33 PM, Venkat <[EMAIL PROTECTED]> wrote:
> > I am sure this question has been asked several times but I could not get
> > the answer using usual searches - which iterator is the right one to
> > the number of rows for a given value or a pattern of value ?
> Take a look at org.apache.accumulo.core.iterators.FirstEntryInRowIterator.
> Does anyone know why this is not in the user iterator package? Is
> there an issue with it? This will bring back the first key/value for
> each row, then you could count those on the client side. This will
> work for a range. For a pattern, David's suggestion of the regex
> filter may be useful. You could also look in the
> You could use FirstEntryInRowIterator and RegEx or RowFilter, but you
> would have to be careful about the order of the iterators.
> > Venkat.