Jorge Godoy escribió:

> I mean, if I wanted to do the above but instead of Sunday or Monday as the
> starting day I'd like using Fridays or Wednesdays...
> 
> Is it possible?  Writing a new function shouldn't be too hard -- it's a matter
> of truncating the week on a day and shifting the date forward or backward --,
> but something like a "SET bow=5" (to make the API consistent with the 'dow'
> that already exists) would be really great!

Is it not just a matter of adding a constant and then taking modulo 7?

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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