Thanks for the explanation(s). I'm going to give a "Create your first java app for Cassandra" webinar on Wednesday, and I was trying to embrace schema creation in CQL, but didn't want to have to use CompositeType's right off the bat. (I'll go with compact storage)
I think I can explain away the empty row/column, but we should probably publicize that. I can see that question coming up on every client/api user list. (hector, astyanax, etc.) -brian --- Brian O'Neill Lead Architect, Software Development Health Market Science The Science of Better Results 2700 Horizon Drive King of Prussia, PA 19406 M: 215.588.6024 @boneill42 <http://www.twitter.com/boneill42> healthmarketscience.com This information transmitted in this email message is for the intended recipient only and may contain confidential and/or privileged material. If you received this email in error and are not the intended recipient, or the person responsible to deliver it to the intended recipient, please contact the sender at the email above and delete this email and any attachments and destroy any copies thereof. Any review, retransmission, dissemination, copying or other use of, or taking any action in reliance upon, this information by persons or entities other than the intended recipient is strictly prohibited. On 12/10/12 3:16 AM, "Sylvain Lebresne" <sylv...@datastax.com> wrote: >There is some more details in >http://www.datastax.com/dev/blog/thrift-to-cql3 but to answer your >questions: > > >> Question 1: >> What is the empty column/value? > > >The technical reasons are here: >https://issues.apache.org/jira/browse/CASSANDRA-4361. But basically, it's >a >CQL3 implementation detail. > >Question 2: >> It also appears as though the column names are CompositeType even >> though there is only one component: > > >Yes, it is the case, and the reason is that this is required to accept >collections (even if you don't use collection initially, not using a >composite means you wouldn't be able to add some later). If you explicitly >don't want a compositeType underneath, you'll need to use the 'WITH >COMPACT >STORAGE' option (in which case you will not be able to use collections >obviously). > >-- >Sylvain
