CounterColumn should have an optional binary field so that double can be
incremented/decremented along with long
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Key: CASSANDRA-2833
URL: https://issues.apache.org/jira/browse/CASSANDRA-2833
Project: Cassandra
Issue Type: Improvement
Components: Core
Reporter: Joe Stein
Currently CounterColumn only has a long making it not feasible to track
increment/decrement of durations or other values common to analytics
represented as a double
The change I am proposing to implement, after some discussions/advice in the
irc to issues raised, is to add a new optional binary field to CounterColumn
(thrift). I was thinking we could call it *operand*
Under the hood (src/java/org/apache/cassandra/db/CounterColumn.java) I would
handle things with byte[] moving between long and double as internal helper
functions with case switch on type of operand we are setting.... might also
need an optional enum for type perhaps too so the client can let the server
know how it should materialize the bytes for when it += the value stored
The clients should continue to work as expected and folks looking to use this
can just do so.
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