There is some discussion in this ticket, looks like it was pushed to a later release
https://issues.apache.org/jira/browse/CASSANDRA-3647?focusedCommentId=13292781&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13292781 I cannot find any open tickets for it https://issues.apache.org/jira/browse/CASSANDRA-5918?jql=labels%20%3D%20cql%20AND%20status%20in%20(Open%2C%20%22In%20Progress%22) May be a good idea to create one and request the feature. Cheers ----------------- Aaron Morton New Zealand @aaronmorton Co-Founder & Principal Consultant Apache Cassandra Consulting http://www.thelastpickle.com On 30/10/2013, at 3:24 am, Keith Freeman <8fo...@gmail.com> wrote: > There's some rationale here: > http://mail-archives.apache.org/mod_mbox/cassandra-user/201305.mbox/%3CCAENxBwx6pcSA=cWn=dkw_52k5odw5f3xigj-zn_4bwfth+4...@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.stew...@gmail.com >
