Erwin Brandstetter <brsaweda@xxxxxxxxx> writes: > Hi all! > This may seem unimportant, but I still would like to know. > I have columns for timestamps without fractional digits, so I could > define them as timestamp(0). > However, there is no way fractions could ever enter anyway, because > triggers and / or checks guarantee values without fractional seconds. > Is it advantageous to define the column as timestamp(0) or simply as > timestamp? > Does the query planner or any other part of the RDBMS profit from the > additional information in the definition? > Or do I just create an overhead of useless checks or conversions > (however small)? There's no advantage to the system from knowing that, but consider that having timestamp_in force the values to be nonfractional is likely to be faster than having logic in a trigger to do it. regards, tom lane -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
