[ https://issues.apache.org/jira/browse/CASSANDRA-7423?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jonathan Ellis updated CASSANDRA-7423: -------------------------------------- Summary: Allow updating individual subfields of UDT (was: make user defined types useful for non-trivial use cases) > Allow updating individual subfields of UDT > ------------------------------------------ > > Key: CASSANDRA-7423 > URL: https://issues.apache.org/jira/browse/CASSANDRA-7423 > Project: Cassandra > Issue Type: Improvement > Components: API, Core > Reporter: Tupshin Harper > Labels: cql > > Since user defined types were implemented in CASSANDRA-5590 as blobs (you > have to rewrite the entire type in order to make any modifications), they > can't be safely used without LWT for any operation that wants to modify a > subset of the UDT's fields by any client process that is not authoritative > for the entire blob. > When trying to use UDTs to model complex records (particularly with nesting), > this is not an exceptional circumstance, this is the totally expected normal > situation. > The use of UDTs for anything non-trivial is harmful to either performance or > consistency or both. > edit: to clarify, i believe that most potential uses of UDTs should be > considered anti-patterns until/unless we have field-level r/w access to > individual elements of the UDT, with individual timestamps and standard LWW > semantics -- This message was sent by Atlassian JIRA (v6.2#6252)