7.2 items

Here is a small list of big TODO items.  I was wondering which ones
people were thinking about for 7.2?

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* Add replication of distributed databases [replication]o automatic fallovero load balancingo master/slave replicationo
multi-masterreplicationo partition data across serverso sample implementation in contrib/rservo queries across
databasesor servers (two-phase commit)
 
* Point-in-time data recovery using backup and write-ahead log
* Allow row re-use without vacuum (Vadim)
* Add the concept of dataspaces/tablespaces [tablespaces]
* Allow better control over user privileges [privileges]
* Allow elog() to return error codes, module name, file name, line number, not just messages [elog]
* Allow international error message support and add error codes [elog]
* Make binary/file in/out interface for TOAST columns
* Large object interface improvements
* Allow inherited tables to inherit index, UNIQUE constraint, and primary key [inheritance]
* Add ALTER TABLE DROP COLUMN feature [drop]
* Add ALTER TABLE ... DROP CONSTRAINT
* Automatically drop constraints/functions when object is dropped

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