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From aaron morton <aa...@thelastpickle.com>
Subject Re: Varchar indexed column and IN(...)
Date Sun, 23 Sep 2012 21:30:39 GMT
> If this is intended behavior, could somebody please point me to where this is
> documented? 
It is intended. 

The docs don't make it totally clear though:
<clause> syntax is:

<primary key name> { = | < | > | <= | >= } <key_value>
<primary key name> IN (<key_value> [,...])

http://www.datastax.com/docs/1.1/references/cql/SELECT

the key_value means only the primary key field.

Cheers

-----------------
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com

On 23/09/2012, at 6:58 AM, Sergei Petrunia <psergey@askmonty.org> wrote:

> Hello,
> 
> Does CQL's IN(...) predicate have the same meaning as SQL's IN(...)? I'm 
> asking this, because I get results that I cannot explain:
> 
> cqlsh:xpl1> select * from t1 where col2='bar1';
> pk   | col1 | col2
> ------+------+------
> pk1b | foo1 | bar1
>  pk1 | foo1 | bar1
> pk1a | foo1 | bar1
> pk1c | foo1 | bar1
> 
> cqlsh:xpl1> select * from t1 where col2 in ('bar1', 'bar2') ;
> cqlsh:xpl1> 
> 
> The first query shows there are records with col2='bar1'. I would expect the
> second query return a superset of what the first query returned. However, it
> returns nothing!
> 
> If this is intended behavior, could somebody please point me to where this is
> documented? 
> 
> == Complete example == 
> # Repeatable on Cassandra 1.1.4 or 1.1.5:
> 
> [cqlsh 2.2.0 | Cassandra 1.1.5 | CQL spec 3.0.0 | Thrift protocol 19.32.0]
> Use HELP for help.
> cqlsh> 
> cqlsh> create keyspace xpl1 WITH strategy_class ='SimpleStrategy' and strategy_options:replication_factor=1;
> cqlsh> use xpl1;
> cqlsh:xpl1> create table t1 (pk varchar primary key, col1 varchar, col2 varchar);
> cqlsh:xpl1> create index t1_c1 on t1(col1);
> cqlsh:xpl1> create index t1_c2 on t1(col2);
> cqlsh:xpl1> insert into t1  (pk, col1, col2) values ('pk1','foo1','bar1');
> cqlsh:xpl1> insert into t1  (pk, col1, col2) values ('pk1a','foo1','bar1');
> cqlsh:xpl1> insert into t1  (pk, col1, col2) values ('pk1b','foo1','bar1');
> cqlsh:xpl1> insert into t1  (pk, col1, col2) values ('pk1c','foo1','bar1');
> cqlsh:xpl1> insert into t1  (pk, col1, col2) values ('pk2','foo2','bar2');
> cqlsh:xpl1> insert into t1  (pk, col1, col2) values ('pk3','foo3','bar3');
> cqlsh:xpl1> select * from t1 where col2='bar1';
> pk   | col1 | col2
> ------+------+------
> pk1b | foo1 | bar1
>  pk1 | foo1 | bar1
> pk1a | foo1 | bar1
> pk1c | foo1 | bar1
> 
> cqlsh:xpl1> select * from t1 where col2 in ('bar1', 'bar2') ;
> cqlsh:xpl1> 
> 
> BR
> Sergei
> -- 
> Sergei Petrunia, Software Developer
> Monty Program AB, http://askmonty.org
> Blog: http://s.petrunia.net/blog


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