I'm migrating from code that uses Cassandra java driver directly to a spring-data-cassandra. Old code used com.datastax.driver.core.PreparedStatement#setIdempotent to mark some queries as idempotent (that provides performance/latency bonus in some cases)
Is there any way to set this property when working through spring-data-cassandra or through spring-cql? I would expect it to be an option for @Query annotation, or a separate annotation on query method, or at least a part of QueryOptions
The only related thing I found is https://jira.spring.io/browse/DATACASS-403 , looks like org.springframework.cassandra.core.CachedPreparedStatementCreator that is used at CassandraTemplate, does not support idempotent flag (and even resets this flag for manually-built queries). Moreover, I did not find any mention at 2.0 spring-data-cassandra branch on github
No, it's not planned for 2.0 yet because the caching is broken and the whole point of idempotent query is to make it cacheable.
There won't be a built in support for this flag until caching issues are fixed. When I looked at this issue, https://jira.spring.io/browse/DATACASS-291 was the main culprit (IMHO) that was blocking this flag from being usable