I interpreted this as "I want to delete an entire row based on specific column family and qualifier value."
On Fri, May 2, 2014 at 12:31 PM, Christopher <ctubb...@apache.org> wrote: > I think there's a terminology mismatch in your question. It sounds > like you're trying to remove single entries (Entry = Key/Value pair), > not entire rows. Or, perhaps worded another way, you're trying to > remove specific column families or columns from seom rows. Is that > correct? > > To delete an entry, you need to use Mutation.putDelete() to insert a > delete entry for a particular key you wish to remove. Typically you > either know the key you wish to delete already, and can just insert > the corresponding delete entry, or you have to scan to identify > matching entries to delete, and issue deletes for each one that > matches your delete criteria. > > The BatchDeleter helps you do the latter > [Connector.createBatchDeleter()]. The BatchDeleter is like a scanner > and a writer combined. You specify the scan criteria (which columns, > ranges, iterators, etc.) to find the entries you wish to delete, and > then you call its delete() method to scan and delete the matching > entries. You can ensure your scan criteria is correct by issuing the > same parameters to a BatchScanner that you would to the BatchDeleter, > and ensuring the returned results are only those entries you wish to > delete, before executing the BatchDeleter. > > If you only have a few entries to delete, you can delete them using > the shell, with either the "delete" or "deletemany" command. The > latter takes iterator and column options, just like a scanner. See the > shell's internal help "help <command>" for more details. > > > > -- > Christopher L Tubbs II > http://gravatar.com/ctubbsii > > > On Fri, May 2, 2014 at 9:55 AM, Marko Escriba <escribama...@gmail.com> > wrote: > > Hi, > > > > Is it possible to remove number of rows from a table based from its > Column > > Qualifier or Family? > > I have noticed that I can only remove on row, the latest inserted row > (based > > on timestamp). In case you want to ask why I need to remove rows, is for > the > > reason that I need to revert the failure transaction made by the webapp. > Any > > advice on this please. > > > > Thanks. > > > > > > > > -- > > View this message in context: > http://apache-accumulo.1065345.n5.nabble.com/Remove-Row-Data-tp9573.html > > Sent from the Developers mailing list archive at Nabble.com. >
