4 Commits

Author	SHA1	Message	Date
Bruce Momjian	65e806cba1	pgindent run for 9.0	2010-02-26 02:01:40 +00:00
Bruce Momjian	0239800893	Update copyright for the year 2010.	2010-01-02 16:58:17 +00:00
Tom Lane	0cb65564e5	Add exclusion constraints, which generalize the concept of uniqueness to ... support any indexable commutative operator, not just equality. Two rows violate the exclusion constraint if "row1.col OP row2.col" is TRUE for each of the columns in the constraint. Jeff Davis, reviewed by Robert Haas	2009-12-07 05:22:23 +00:00
Tom Lane	25d9bf2e3e	Support deferrable uniqueness constraints. ... The current implementation fires an AFTER ROW trigger for each tuple that looks like it might be non-unique according to the index contents at the time of insertion. This works well as long as there aren't many conflicts, but won't scale to massive unique-key reassignments. Improving that case is a TODO item. Dean Rasheed	2009-07-29 20:56:21 +00:00