Server Side Operations
----------------------
Key: CASSANDRA-1215
URL: https://issues.apache.org/jira/browse/CASSANDRA-1215
Project: Cassandra
Issue Type: New Feature
Components: Core
Reporter: Edward Capriolo
Cassandra values are byte arrays. To operate on these byte arrays a client will
have to get the value from a server, modify it , and retransmit the value back
to be set. This is NOT a request for atomic operations, however some types of
atomic operations may be possible after vector clocks are implemented.
Regardless of vector clocks or atomic operations, some common string operations
would still be useful.
These type of functions may include:
{noformat}
append
substring
increment
indexof
{noformat}
Operations that work on lists would be more challenging again because Cassandra
does not know or care what the underlying column data is, but those could be
specified in the method call.
{noformat}
pop (String delimieter )
itemat(String delimeter, item i)
{noformat}
or possibly described in the schema (I do not like this idea but wanted to
mention it)
{noformat}
<ColumnFamily valueDelimeter"\t"> {noformat}
Also theoretically a user could pass an object implementing an interface or a
string that is a "little language" that operates on the data to return some
result or change the data.
I would like to discuss the merits of such features, and if we decide these
would be useful I would like to work on implementing them. I can not assign
myself this ticket otherwise I would have.
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