See the following PDF for some additional detail on hector: http://www.riptano.com/sites/default/files/hector-v2-client-doc.pdf
There is a also a project with some basic stand-alone examples that may be helpful: https://github.com/zznate/hector-examples And Riptano maintains a Java port of a Twitter example using Hector: https://github.com/riptano/twissjava On Sat, Dec 25, 2010 at 12:22 AM, <roshandawr...@gmail.com> wrote: > Can you please point me an example of that or some Hector API documentation? > > I am currently using IndexedSliceRangeQuery to filter on a 2ndary index and > fetching all columns of the matching rows - using range start/end = null. Can > the option you suggest be used with the 2ndry index filtering? I would > appreciate very much seeing an example. > > Does it make any performance difference whether that conversion is done by > Hector/Cass or by the app? > > Thanks. > Roshan > --------------------------------------------------- > Sent from BlackBerry > > -----Original Message----- > From: Jonathan Ellis <jbel...@gmail.com> > Date: Sat, 25 Dec 2010 00:05:44 > To: user<user@cassandra.apache.org> > Reply-To: user@cassandra.apache.org > Subject: Re: Newbie question - fetching multiple columns of different > datatypes and conversion from byte[] > > Or you can specify the types with the column name instead of doing a slice. > > On Fri, Dec 24, 2010 at 11:23 PM, Nate McCall <n...@riptano.com> wrote: >> In the case where you have different value types within the same >> slice, yes, you must handle the conversion yourself and >> ByteBufferSerializer is the easiest way to do that. >> >> On Fri, Dec 24, 2010 at 10:44 PM, Roshan Dawrani >> <roshandawr...@gmail.com> wrote: >>> Hi, >>> >>> I am new to Cassandra and Hector and have a basic question on fetching >>> multiple columns of a row that have mixed data types. >>> >>> So, I am basically doing equivalent of "Select dateCol1, dateCol2, >>> stringCol1, intCol1 from a_table where key in (?, ?, ?...)" >>> >>> My question is do I need to do the conversion of columns from byte[] to >>> Date/String/Int myself after taking out data from the ColumnSlice? >>> >>> For saving the same data, while adding the columns, I was able to tell which >>> serializer to use, but slice queries seem to take only one ValueSerializer >>> for all columns being retrieved. So, if I have got it correctly, I can only >>> use ByteBufferSerializer in the Hector API slice query call and then do >>> further data-type specific conversion myself at the app level? >>> >>> -- >>> Roshan >>> Blog: http://roshandawrani.wordpress.com/ >>> Twitter: @roshandawrani >>> Skype: roshandawrani >>> >> > > > > -- > Jonathan Ellis > Project Chair, Apache Cassandra > co-founder of Riptano, the source for professional Cassandra support > http://riptano.com >
