Horton

Re: [HACKERS] Modulo syntax

Bruce Momjian <maillist@candle.pha.pa.us>

View thread
From: Bruce Momjian <maillist@candle.pha.pa.us>
To: phd2@earthling.net
Cc: pgsql-hackers@postgreSQL.org
Date: 1999-03-17T16:21:41Z
Lists: pgsql-hackers 
> Hello!
> 
>    I ran the query
> update producers SET cor_id = producer_id % 9 + 1;
> 
>    and found that result is eqiuvalent to
> update producers SET cor_id = producer_id % 9;
> 
>    I added parens:
> update producers SET cor_id = (producer_id % 9) + 1;
> 
>    and got what I needed.

Looks like a bug.  We have associativity for +, -, * and /, but not %.
>From gram.y:

	%left       '+' '-'
	%left       '*' '/'

I will add '%' to that.

-- 
  Bruce Momjian                        |  http://www.op.net/~candle
  maillist@candle.pha.pa.us            |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026