http://www.datastax.com/support-forums/topic/key-type-column_name-type Software, Support, and Training for Apache Cassandra en-US Tue, 21 May 2013 13:28:55 +0000 http://bbpress.org/?v=1.0.3 q http://www.datastax.com/support-forums/search.php http://www.datastax.com/support-forums/topic/key-type-column_name-type#post-1074 Mon, 30 Jan 2012 17:29:10 +0000 nickmbailey 1074@http://www.datastax.com/support-forums/ <p>What is the exact error you are getting from the CLI? The key_validation_class should only affect your row keys and it is fine to have different validators for the column values. Column names are validated by the 'comparator' setting. </p> http://www.datastax.com/support-forums/topic/key-type-column_name-type#post-1072 Sun, 29 Jan 2012 11:54:46 +0000 Anonymous 1072@http://www.datastax.com/support-forums/ <p>same with DataStax Community Edition 1.0.7 </p> http://www.datastax.com/support-forums/topic/key-type-column_name-type#post-1071 Sun, 29 Jan 2012 10:38:41 +0000 Anonymous 1071@http://www.datastax.com/support-forums/ <p>in my example I'd like to store files in two column families: files_meta and files_data<br /> files_meta contains attributes like name, size etc<br /> files_data contains the actual raw data splitted into chunks</p> <p>I'd like to use UUIDs as ByteType keys but at the same time the column names in files_meta should be in UTF8Type</p> <p>update column family files_data<br /> with comparator = 'BytesType'<br /> and key_validation_class = 'BytesType'<br /> and column_metadata =<br /> [<br /> ];</p> <p>update column family files_meta<br /> with comparator = 'BytesType'<br /> and key_validation_class = 'BytesType'<br /> and default_validation_class = 'UTF8Type'<br /> and column_metadata =<br /> [<br /> {column_name: name, validation_class: UTF8Type},<br /> {column_name: size, validation_class: LongType},<br /> ];</p> <p>unfortunately cassandra (1.0.6) does not allow to have different key- and column_name-types? at least CLI does not like this column family definition</p> <p>I'm not sure yet if I really need that as I'm just getting started with Cassandra but it looks strange to me that the key_validation_class also accounts for the column names </p>