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
