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Re: LinuxTag wrapup

From: Andreas Pflug <pgadmin(at)pse-consulting(dot)de>
To: Dennis Bjorklund <db(at)zigo(dot)dhs(dot)org>
Cc: PostgreSQL Development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: LinuxTag wrapup
Date: 2004-07-03 17:15:55
Message-ID: 40E6E9CB.5090106@pse-consulting.de (view raw or flat)
Thread:
Lists: pgsql-hackers
Dennis Bjorklund wrote:

>
>Having two parsers would be a nightmare to maintain.
>  
>
Probably. It just came to my mind because one visitor mentioned he would 
look at the bison stuff to do it himself. I meant to enable him to do so 
if he likes (and can) without hacking the core product.

>If anything one could have one parser that handles oracle syntax and give
>errors on such constructs unless some variable is set.
>
>The question is how much of the problems that are pure syntax and what 
>needs deeper changes. My guess is that just changing some syntax will not 
>be enough to make many oracle program work.
>
>  
>
That's true, it's the question how much can be offered without too much 
effort.
I'm not too deep in oracle stuff, what comes to my mind is
- outer join syntax (parser thing)
- sequences usage (parser too)
- maybe stored procedure call, with a wrapper to convert output 
parameters to a composite return value.

There's certainly no point supporting any weird ddl command, so there's 
still porting work to be done when migrating.

Regards,
Andreas



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