Re: Informix and OUTER join syntax

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org>
Subject: Re: Informix and OUTER join syntax
Date: 2000-01-12 20:43:10
Message-ID: 200001122044.PAA13564@candle.pha.pa.us
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> Looking in the Informix manuals, I now see how they handle complex outer
> joins:
>
> SELECT *
> FROM tab1, OUTER(tab2, tab3)
> WHERE tab1.col1 = tab2.col1 AND
> tab2.col1 = tab3.col1
>
> It does the tab2, tab3 join first, then _outer_ joins to tab1.
> Interesting.

Here is another example that does a double outer join:

SELECT *
FROM tab1, OUTER(tab2, OUTER tab3)
WHERE tab1.col1 = tab2.col1 AND
tab2.col1 = tab3.col1

It does the tab2, tab3 as an _outer_ join first, then _outer_ joins to
tab1. Even more interesting.

Can someone show me this in ANSI syntax?

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