-RE: TimeSpan Iterator
Bob.Thorman@... 2012-08-28, 16:51
Your comment "Users should be aware that this is not an efficient
operation, though." may help me decide if my current use of a secondary
time index is better then. Right now I maintain a table that has
timestamps as the rowid whose values are the rowid in a metadata table.
Therefore I do one range scan based on the timestamp. Then a second
lookup of the metadata rowid. Is this more efficient?
From: Billie Rinaldi [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, August 28, 2012 11:46
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Subject: Re: TimeSpan Iterator
On Tue, Aug 28, 2012 at 6:33 AM, John Armstrong <[EMAIL PROTECTED]> wrote:
On 08/28/2012 09:26 AM, [EMAIL PROTECTED] wrote:
Does anyone know of a TimeSpan Iterator that will fetch rows based on
the accumulo timestamp?
We actually wrote our own TimestampRangeIterator and
TimestampSetIterator classes. I don't know if 1.4 has any in the core
libraries. It's not very hard though.
There's a TimestampFilter in org.apache.accumulo.core.iterators.user in
1.4. It uses a range of timestamps. Users should be aware that this is
not an efficient operation, though.