Sidharth created CASSANDRA-4920: ----------------------------------- Summary: Add Collation to abstract type to provide standard sort order for Strings Key: CASSANDRA-4920 URL: https://issues.apache.org/jira/browse/CASSANDRA-4920 Project: Cassandra Issue Type: Improvement Components: API, Core Affects Versions: 1.2.0 beta 1 Reporter: Sidharth
Adding a way to sort UTF8 based on a standard order(collation) is very useful. Say for example you have wide rows where you cannot use cassandra's standard indexes(secondary/primary index). Lets say each column had a string value that was either one of alphanumeric or purely numeric. Now lets say I want to index these values in a materialized views so I could look up things by range of values (range makes sense as a standard ordering over my alpha numeric and numeric strings i.e. "12" < "10000"). More specifically I add these values into a CompositeType and SliceRange over them for the index to work and I dont really care weather its a alpha or a numeric, it should be in the order that follows collation semantics as follows: 1) If the string is a numeric then it should be comparable like a numeric 2) If its a alpha then it should be comparable like a normal string. 3) If its a alhpa-numeric then a contiguos sequence of numbers in the string should be compared as numbers like "c10" > "c2". 4) UTF8 type strings assumed everywhere. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira