Re: Updated CREATE FUNCTION syntax

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От Joel Burton
Тема Re: Updated CREATE FUNCTION syntax
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Msg-id JGEPJNMCKODMDHGOBKDNKEHGCOAA.joel@joelburton.com
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Ответ на Updated CREATE FUNCTION syntax  (Peter Eisentraut <peter_e@gmx.net>)
Ответы Re: Updated CREATE FUNCTION syntax  (Peter Eisentraut <peter_e@gmx.net>)
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> -----Original Message-----
> From: pgsql-hackers-owner@postgresql.org
> [mailto:pgsql-hackers-owner@postgresql.org]On Behalf Of Peter Eisentraut
> Sent: Thursday, May 16, 2002 1:22 PM
> To: PostgreSQL Development
> Subject: [HACKERS] Updated CREATE FUNCTION syntax
>
>
> As per earlier vague hint, I'm bringing the CREATE FUNCTION syntax in line
> with SQL99.  Everything is fully backward compatible.  Here is the new
> synopsis:
>
> CREATE [OR REPLACE] FUNCTION name (args) RETURNS type
>   option [ option... ] [WITH (...)];
>
> where option is any of these in any order:
>
> AS string [,string]
> LANGUAGE name
> IMMUTABLE
> STABLE
> VOLATILE
> CALLED ON NULL INPUT        -- SQL spelling of not "strict"
> RETURNS NULL ON NULL INPUT    -- SQL spelling of "strict"
> STRICT
> [EXTERNAL] SECURITY DEFINER    -- SQL spelling of "setuid"
> [EXTERNAL] SECURITY INVOKER    -- SQL spelling of not "setuid"
> IMPLICIT CAST
>
> (The SECURITY options are noops right now, but I'm planning to implement
> them next.)
>
> The WITH (...) options are still there, but sort of less encouraged, I
> guess.

Is there any standardized way of handling the single-quotes within function
definition? Rather than doubling them up (which can make for very messy code
when your scripting language uses single quotes!), allowing another symbol
to be used, with that symbol be declared in the CREATE FUNCTION line?
Interbase uses a system like this: you can set the delimiter to anything you
want and use that instead of '.

- J.

Joel BURTON | joel@joelburton.com | joelburton.com | aim: wjoelburton
Knowledge Management & Technology Consultant



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