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 <mailto:liam.stew...@gmail.com>
