On Wed, Jan 21, 2009 at 02:03:03AM -0500, Tom Lane wrote:
> Roger Leigh <rleigh@codelibre.net> writes:
> > I've created a new domain (debversion) derived from TEXT, which
> > includes its own operators (< <= = >= > and <>), and also its
> > own operator class for BTREE indices.
>
> You can't realistically attach such things to a domain; try making
> a separate type, perhaps with an implicit cast to text to allow
> use of text operators for other purposes.
Ah, thanks for the clarification. So I need to use CREATE TYPE
rather than CREATE DOMAIN. Because I'm essentially just storing
a text string with different operators, can I derive a type from
TEXT (perhaps by reusing the same input, output, receive and send
functions as TEXT?) I saw the textsend and textreceive functions,
which I assume are the appropriate functions for send and receive?
Are there any for input and output which I may reuse?
Many thanks,
Roger
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