Re: Partitioning documentation example

Tom Lane wrote:
> Bruce Momjian <bruce@momjian.us> writes:
> > Because my EXECUTE example didn't work I have created a new example
> > using date_trunc(), which I think is less error-prone than the
> > comparisons done in the original example:
>
> This is not an improvement either.  You can't represent the check
> constraints that way (at least not if you want the planner to do
> constraint exclusion with them) and I don't think it's "less
> error-prone" to have a different representation in the trigger than
> you have in the constraints.

I see, so date_trunc() can't be used for constraint exclusion in the
CHECK constraint, and the trigger should match;  makes sense.

--
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://postgres.enterprisedb.com

  + If your life is a hard drive, Christ can be your backup. +