Unfortunately, I need to query per list items. That's why I'm running
Cassandra 2.1rc1 (offers secondary indexes for collections).
I'm also studying Dynamo, it seems to be somewhat more dynamic by nature
and allows mixed type lists. As I understood it, also Cassandra supports
dynamic schemas, but only through Thrift protocol. Also, I don't think it
changes the fact that collections need to be strongly-typed in Cassandra,
no matter what protocol is used?
Tuukka
On Tue, Jun 24, 2014 at 9:41 PM, DuyHai Doan <doanduy...@gmail.com> wrote:
> "Jeremy, with blob field (ByteBuffer), I can query exact matches (just
> encode the value in query), but greater/less than queries would not work.
> Any sort of serialization kills "native" ways to query data" --> Not
> necessarily. You still use "normal" types (uuid, string, timestamp,...) for
> clustering columns and use them for querying. For the cells where you store
> values, use blob type.
>
>
>
>
> On Tue, Jun 24, 2014 at 8:21 PM, Tuukka Mustonen <
> tuukka.musto...@gmail.com> wrote:
>
>> What if I need to query by list items?
>>
>> 1. Jeremy, with blob field (ByteBuffer), I can query exact matches (just
>> encode the value in query), but greater/less than queries would not work.
>> Any sort of serialization kills "native" ways to query data
>> 2. Even with user defined types, I would need to define separate fields
>> for each value. Running queries would be cumbersome (something like WHERE
>> items CONTAINS {'text_value': 'foobar'} or WHERE items CONTAINS
>> {'int_value': 3}. Pavel, did you mean like this?
>>
>> I'm running 2.1rc1 with python driver 2.0.2.
>>
>> Tuukka
>>
>>
>> On Tue, Jun 24, 2014 at 4:39 PM, Pavel Kogan <pavel.ko...@cortica.com>
>> wrote:
>>
>>> 1) You can use list of strings which are serialized JSONs, or use
>>> ByteBuffer with your own serialization as Jeremy suggested.
>>> 2) Use Cassandra 2.1 (not officially released yet) were there is new
>>> feature of user defined types.
>>>
>>> Pavel
>>>
>>>
>>>
>>>
>>> On Tue, Jun 24, 2014 at 9:18 AM, Jeremy Jongsma <jer...@barchart.com>
>>> wrote:
>>>
>>>> Use a ByteBuffer value type with your own serialization (we use
>>>> protobuf for complex value structures)
>>>> On Jun 24, 2014 5:30 AM, "Tuukka Mustonen" <tuukka.musto...@gmail.com>
>>>> wrote:
>>>>
>>>>> Hello,
>>>>>
>>>>> I need to store a list of mixed types in Cassandra. The list may
>>>>> contain numbers, strings and booleans. So I would need something like
>>>>> list<?>.
>>>>>
>>>>> Is this possible in Cassandra and if not, what workaround would you
>>>>> suggest for storing a list of mixed type items? I sketched a few (using a
>>>>> list per type, using list of user types in Cassandra 2.1, etc.), but I get
>>>>> a bad feeling about each.
>>>>>
>>>>> Couldn't find an "exact" answer to this through searches...
>>>>> Regards,
>>>>> Tuukka
>>>>>
>>>>> P.S. I first asked this at SO before realizing the traffic there is
>>>>> very low:
>>>>> http://stackoverflow.com/questions/24380158/storing-a-list-of-mixed-types-in-cassandra
>>>>>
>>>>>
>>>
>>
>
