> create table messages(
> body text,
> username text,
> tags set<text>
> PRIMARY keys(username,tags)
> )
This statement is syntactically invalid, also you cannot use a collection type
in the primary key.
> 1) I should be able to query by username and get all the messages for a
> particular username
yes.
> 2) I should be able to query by tags and username ( likes select * from
> messages where username='xya' and tags in ('awesome','phone'))
No.
> 3) I should be able to query all messages by day and order by desc and limit
> to some value
No.
> Could you guys please let me know if creating a secondary index on the tags
> field?
No, it’s not supported.
> Or what would be the best way to model this data.
You need to describe the problem and how you want to read the data. I suggest
taking a look at the data modelling videos from Patrick here
http://planetcassandra.org/Learn/CassandraCommunityWebinars
Cheers
-----------------
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 10/12/2013, at 8:57 am, Shrikar archak <[email protected]> wrote:
> Hi Data Model Experts,
> I have a few questions with data modelling for a particular application.
>
> example
> create table messages(
> body text,
> username text,
> tags set<text>
> PRIMARY keys(username,tags)
> )
>
>
> Requirements
> 1) I should be able to query by username and get all the messages for a
> particular username
> 2) I should be able to query by tags and username ( likes select * from
> messages where username='xya' and tags in ('awesome','phone'))
> 3) I should be able to query all messages by day and order by desc and limit
> to some value
>
>
> Could you guys please let me know if creating a secondary index on the tags
> field?
> Or what would be the best way to model this data.
>
> Thanks,
> Shrikar
