A minor correction: To get all columns starting with "ABC_", you would set column_start="ABC_" and column_finish="ABC`" (the '`' character comes after '_'), and ignore the last column in your results if it happened to be "ABC`".
column_finish, or the "slice end" in other clients, is inclusive. You could of course use "ABC_~" as column_finish and avoid the check if you know that you don't have column names like "ABC_~FOO" that you want to include. On Tue, Aug 2, 2011 at 7:17 PM, aaron morton <aa...@thelastpickle.com>wrote: > Yup, thats a pretty common pattern. How exactly depends on the client you > are using. > > Say you were using pycassam, you would do a get() > http://pycassa.github.com/pycassa/api/pycassa/columnfamily.html#pycassa.columnfamily.ColumnFamily.get > > with column_start="ABC_" , count to whatever, and column_finish not > provided. > > You can also provide a finish and use the highest encoded character, e.g. > ascii 126 is ~ so if you used column_finish = "ABC_~" you would get > everything that starts with ABC_ > > Cheers > > ----------------- > Aaron Morton > Freelance Cassandra Developer > @aaronmorton > http://www.thelastpickle.com > > On 3 Aug 2011, at 09:28, Eldad Yamin wrote: > > Hello, > I wonder if I can select a column or all columns that start with X. > E.g I have columns ABC_1, ABC_2, ZZZ_1 and I want to select all columns > that start with ABC_ - is that possible? > > > > Thanks! > > > -- Tyler Hobbs Software Engineer, DataStax <http://datastax.com/> Maintainer of the pycassa <http://github.com/pycassa/pycassa> Cassandra Python client library
