On Sun, Feb 23, 2014 at 07:50:08AM +0330, Mohsen SM wrote:
> Hello.
> I have a new type similar to varchar.
> I want to fine how did I can to calculate typemod
> and where must I calculate typemod for this type.

Well, typmods are type-specific, so there is no official way to
calculate it.  I would look at how an existing type uses typmod and copy

  Bruce Momjian  <br...@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + Everyone has their own god. +

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