and AsciiType
----------------- Aaron Morton Freelance Cassandra Developer @aaronmorton http://www.thelastpickle.com On 3 Aug 2011, at 16:35, eldad87 wrote: > Thank you! > Will this situation work only for UTF8Type comparator? > > > On Wed, Aug 3, 2011 at 4:50 AM, Tyler Hobbs <ty...@datastax.com> wrote: > 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 > Maintainer of the pycassa Cassandra Python client library > >
