Re: [HACKERS] Enhancing PGSQL to be compatible with Informix SQL

> > Thomas has tried to explain the ANSI syntax for outer joins, and I must
> > say I am quite confused by it.  A simple OUTER added before the column
> > name would be a quick and simple way to do outers, perhap get them into
> > 7.0, and allow new users to do outers without having to learn the quite
> > complex ANSI syntax.
> > 
> > At least that was my idea.
> 
> First, I'm for getting OUTER JOINs in ASAP...but, I'm a little concerned
> with thought of throwing in what *sounds* like a 'stop gap' measure...
> 
> Just to clarify..."A simple OUTER added before the column" would be a
> PostgreSQL-ism?  Sort of like Oracle and all the rest have their own
> special traits?  Eventually, the plan is to implement OJs as "SQL92 spec",
> and leave our -ism in for backwards compatibility?

Yes, OUTER is an Informix-ism.  Oracle uses *=.  I think the first is
easier to add and makes more sense for us.  *= could be defined by
someone as an operator, and overloading our already complex operator
code to do *= for OUTER may be too complex for people to understand.

It would be:

	SELECT *
	FROM tab1, OUTER tab2
	WHERE tab1.col1 = tab2.col2


-- 
  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