Re: [GENERAL] User defined function

From: greg(at)proterians(dot)net
To: Moray McConnachie <moray(dot)mcconnachie(at)computing-services(dot)oxford(dot)ac(dot)uk>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: [GENERAL] User defined function
Date: 1999-10-15 14:29:37
Message-ID: Pine.LNX.4.05.9910151625370.22928-100000@proterians.net
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> I need to write a function to return the first of december of the year
> previous to the current year. Part of my problem is I'm not sure how
> to escape quotes in function definitions. I am looking at something
> along the lines of
>
> CREATE FUNCTION startofregyear(date) RETURNS date AS '
> SELECT text_datetime('01/12/' float8_text(datepart('year',$1)-1))
> AS answer;
> ' LANGUAGE 'SQL';
>
> but clearly this won't work because of the large number of single
> quotes. I've tried escaping the quotes in the SELECT line with
> backslashes, but that doesn't seem to do it.
>
> Can anyone tell me if this function should work, once I sort out the
> escaping?
>
try using double quotas...

CREATE FUNCTION startofregyear(date) RETURNS date AS '
SELECT text_datetime(''01/12/'' float8_text(datepart(''year'',$1)-1))
AS answer;
' LANGUAGE 'SQL';

It should work...

--Greg--

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