simple, elegant, and less performant than just doing a range scan
without the index. :)
On Tue, Oct 11, 2011 at 4:06 PM, Sasha Dolgy <sdo...@gmail.com> wrote:
> ah, hadn't even thought of that. simple. elegant.
> cheers.
>
> On Tue, Oct 11, 2011 at 11:01 PM, Jake Luciani <jak...@gmail.com> wrote:
>>
>> This hasn't changed in AFAIK, In Brisk we had the same problem in CFS so
>> we created a sentinel value that all rows shared then it works.
>> CASSANDRA-2915 should fix it.
>> On Tue, Oct 11, 2011 at 4:48 PM, Sasha Dolgy <sdo...@gmail.com> wrote:
>>>
>>> I was trying to get a range of rows based on a secondary_index that was
>>> defined. Any rows where age was greater than or equal to ... it didn't
>>> work. Is this a continued limitation? Did a quick look in JIRA, couldn't
>>> find anything.
>>> The output from "help get;" on the cli contains the following, which led
>>> me to believe it was a limitation on Cassandra 0.7.x and not on 0.8.x ...
>>> get <cf> where <col> <operator> <value> [
>>> and <col> <operator> <value> and ...] [limit <limit>];
>>> get <cf> where <col> <operator> <function>(<value>) [
>>> and <col> <operator> <function> and ...] [limit <limit>];
>>> - operator: Operator to test the column value with. Supported operators
>>> are
>>> =, >, >=, <, <= .
>>> In Cassandra 0.7 at least one = operator must be present.
>>> [default@sdo] get user where age >= 18;
>>> No indexed columns present in index clause with operator EQ
>>> [default@sdo] get user where gender = 1 and age >= 18
>>> (returns results)
>>> Tested this behavior on 0.8.2, 0.8.6 and now 0.8.7 ...
>>> create column family user
>>> with column_type = 'Standard'
>>> and comparator = 'UTF8Type'
>>> and default_validation_class = 'BytesType'
>>> and key_validation_class = 'BytesType'
>>> and memtable_operations = 0.24843749999999998
>>> and memtable_throughput = 53
>>> and memtable_flush_after = 1440
>>> and rows_cached = 0.0
>>> and row_cache_save_period = 0
>>> and keys_cached = 200000.0
>>> and key_cache_save_period = 14400
>>> and read_repair_chance = 1.0
>>> and gc_grace = 864000
>>> and min_compaction_threshold = 4
>>> and max_compaction_threshold = 32
>>> and replicate_on_write = true
>>> and row_cache_provider = 'ConcurrentLinkedHashCacheProvider'
>>> and column_metadata = [
>>> {column_name : 'gender',
>>> validation_class : LongType,
>>> index_name : 'user_gender_idx',
>>> index_type : 0},
>>> {column_name : 'year',
>>> validation_class : LongType,
>>> index_name : 'user_year_idx',
>>> index_type : 0}];
>>>
>>>
>>> --
>>> Sasha Dolgy
>>> sasha.do...@gmail.com
>>
>>
>>
>> --
>> http://twitter.com/tjake
>
>
>
> --
> Sasha Dolgy
> sasha.do...@gmail.com
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
