Every thing is possible with Thrift, provided that you manage every thing manually client side. Having coded an implementation of Achilles (object mapper) over Hector, it was really painfull to manage collections in Thrift.
Now to stick to the topic, if you want to nest collections into collections, it'll be possible in C* 2.1 with user defined types: http://www.datastax.com/dev/blog/cql-in-2-1 On Sat, Jun 14, 2014 at 7:01 AM, Johan Edstrom <seij...@gmail.com> wrote: > Well to throw fire on the debate, that was actually really simple in > Thrift. > > On Jun 13, 2014, at 10:50 PM, Kevin Burton <bur...@spinn3r.com> wrote: > > > I could see just saying screw it and storing a serialized json object > that gets read back in automatically as a map. That wouldn't be too > painful but just not super pretty in terms of representing the data in > cassandra. > > > > > > On Fri, Jun 13, 2014 at 8:45 PM, Jack Krupansky <j...@basetechnology.com> > wrote: > > The first question is how you need to access this data. Do you need to > directly access “bar” from a SELECT? Do you need to access “foo” as... what > – Java Map, or what? > > > > That said, you can always flatten a map of maps by simply concatenating > the keys, such as {“foo_bar”: “hello”} and then you can select ‘foo_bar’. > Ditto for additional levels. And if you want each of the intermediate > levels, pick a serialization format such as JSON or BSON in addition to the > flattened leaf values. Anything in your use case(s) that doesn’t cover? > > > > -- Jack Krupansky > > > > From: Kevin Burton > > Sent: Friday, June 13, 2014 8:17 PM > > To: user@cassandra.apache.org > > Subject: Pattern to store maps of maps... > > > > So the cassandra map support in CQL is nice but it's got me wanting > deeper nesting. > > > > For example { "foo": { "bar": "hello" } } > > > > … but that's not possible with CQL. > > > > Of course… one solution is something like avro, and then store your > entire record as a blob. > > > > I guess that's not TOO bad but that means all my data is somewhat opaque > to cqlsh. > > > > What are my options here? What are you guys doing to work around this > problem? > > > > -- > > > > Founder/CEO Spinn3r.com > > Location: San Francisco, CA > > Skype: burtonator > > blog: http://burtonator.wordpress.com > > … or check out my Google+ profile > > > > War is peace. Freedom is slavery. Ignorance is strength. Corporations > are people. > > > > > > > > -- > > > > Founder/CEO Spinn3r.com > > Location: San Francisco, CA > > Skype: burtonator > > blog: http://burtonator.wordpress.com > > … or check out my Google+ profile > > > > War is peace. Freedom is slavery. Ignorance is strength. Corporations > are people. > > > >
