On 2009-10-27, Joshua Berry <yoberi@xxxxxxxxx> wrote: > I couldn't find the operator '@' for intervals and found this thread > from over six years ago: > http://archives.postgresql.org/pgsql-general/2003-09/msg00292.php > >| "Claudio Lapidus" <clapidus@xxxxxxxxxxx> writes: >| > Bruce Momjian wrote: >| >> Why would you want an abolute value of a negative interval? >| >| > Because I'm trying to match pairs of records that satisfy certain criteria, >| >| Given that we have a unary-minus operator for intervals, I see no >| conceptual objection to having an absolute-value operator (and \do shows >| that interval is the only standard datatype that has the former but not >| the latter). >| >| However, given that it doesn't seem to be a really widely useful >| operator, I think this is the kind of itch that you'll have to scratch >| yourself. Send us a patch and it'll get into the next release ... >| >| regards, tom lane > > Is this is the case now? I have some data that is related but requires > fuzzy joining on timestamps within a time interval. > > I'd like to be able to do this: > select * from enviados e, recibidos r where @ (e.fecha - r.fecha) < > interval '1 second' for this case: convert to seconds and then do abs. select * from enviados e, recibidos r where abs(extract ( epoch from (e.fecha - r.fecha) )) < 1 thanks for sparking an interesting discussion. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
