incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Sylvain Lebresne <sylv...@datastax.com>
Subject Re: Using composite column names in the CLI
Date Tue, 17 May 2011 08:44:37 GMT
Provided you're working on a branch that has CASSANDRA-2231 applied (that's
either the cassandra-0.8.1 branch or trunk), this work 'out of the box':

The setup will look like:
[default@unknown] create keyspace test;
[default@unknown] use test;
[default@test] create column family testCF with
comparator='CompositeType(AsciiType, IntegerType(reversed=true),
IntegerType)' and default_validation_class=AsciiType;

Then:
[default@test] set testCF[a]['foo:24:24'] = 'v1';
Value inserted.
[default@test] set testCF[a]['foo:42:24'] = 'v2';
Value inserted.
[default@test] set testCF[a]['foobar:42:24'] = 'v3';
Value inserted.
[default@test] set testCF[a]['boobar:42:24'] = 'v4';
Value inserted.
[default@test] set testCF[a]['boobar:42:42'] = 'v5';
Value inserted.
[default@test] get testCF[a];
=> (column=boobar:42:24, value=v4, timestamp=1305621115813000)
=> (column=boobar:42:42, value=v5, timestamp=1305621125563000)
=> (column=foo:42:24, value=v2, timestamp=1305621096473000)
=> (column=foo:24:24, value=v1, timestamp=1305621085548000)
=> (column=foobar:42:24, value=v3, timestamp=1305621110813000)
Returned 5 results.

--
Sylvain

On Tue, May 17, 2011 at 9:20 AM, David Boxenhorn <david@taotown.com> wrote:
> This is what I'm talking about
>
> https://issues.apache.org/jira/browse/CASSANDRA-2231
>
> The on-disk format is
>
> <(short)length><constituent><end byte = 0><(short)length><constituent><end
> byte = 0>...
>
> I would like to be able to input these kinds of keys into the CLI, something
> like
>
> set cf[key]['constituent1':'constituent2':'constituent3'] = val
>
>
> On Tue, May 17, 2011 at 2:15 AM, Sameer Farooqui <cassandralabs@gmail.com>
> wrote:
>>
>> Cassandra wouldn't know that the column name is composite of two different
>> things. So you could just request the column names and values for a specific
>> key like this and then just look at the column names that get returned:
>> [default@MyKeyspace] get DemoCF[ascii('key_42')];
>> => (column=CA_SanJose, value=50, timestamp=1305236885112000)
>> => (column=CA_PaloAlto, value=49, timestamp=1305236885192000)
>> => (column=FL_Orlando, value=45, timestamp=1305236885280000)
>> => (column=NY_NYC, value=40, timestamp=1305236885361000)
>>
>> And I'm not sure what you mean by inputting composite column names. You
>> just input them like any other column name:
>> [default@MyKeyspace] set DemoCF['key_42']['CA_SanJose']='51';
>> Value inserted.
>>
>>
>>
>>
>> On Mon, May 16, 2011 at 2:34 PM, Aaron Morton <aaron@thelastpickle.com>
>> wrote:
>>>
>>> What do you mean by composite column names?
>>>
>>> Do the data type functions supported by get and set help? Or the assume
>>> statement?
>>>
>>> Aaron
>>> On 17/05/2011, at 3:21 AM, David Boxenhorn <david@taotown.com> wrote:
>>>
>>> > Is there a way to view composite column names in the CLI?
>>> >
>>> > Is there a way to input them (i.e. in the set command)?
>>> >
>>
>
>

Mime
View raw message