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From Sasha Dolgy <sdo...@gmail.com>
Subject Re: Operator on secondary indexes in 0.8.x (GTE/LTE)
Date Tue, 11 Oct 2011 21:06:05 GMT
ah, hadn't even thought of that.  simple.  elegant.

cheers.

On Tue, Oct 11, 2011 at 11:01 PM, Jake Luciani <jakers@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 <sdolgy@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.dolgy@gmail.com
>>
>
>
>
> --
> http://twitter.com/tjake
>



-- 
Sasha Dolgy
sasha.dolgy@gmail.com

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