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From Keith Freeman <8fo...@gmail.com>
Subject Re: CQL & selecting individual items from a map
Date Tue, 29 Oct 2013 14:24:51 GMT
There's some rationale here: 
http://mail-archives.apache.org/mod_mbox/cassandra-user/201305.mbox/%3CCAENxBwx6pcSA=cWn=dKW_52K5odw5F3Xigj-zn_4BwFth+4ruA@mail.gmail.com%3E

And I'm sure part of the reason is the 64k size limit: maps (and sets 
and lists) are limited to 64k total size 
(http://wiki.apache.org/cassandra/CassandraLimitations), so it wouldn't 
be very read-efficient to load individual elements.

On 10/28/2013 08:03 PM, Liam Stewart wrote:
> I was wondering if anybody could explain the rationale behind 
> disallowing selection of individual elements from a map in CQL and why 
> an entire map must be retrieved at once when items are stored as 
> distinct columns? Are there any plans to allow individual selection?
>
> -- 
> Liam Stewart :: liam.stewart@gmail.com <mailto:liam.stewart@gmail.com>


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