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Re: UNION JOIN vs UNION SELECT

From: Thomas Lockhart <lockhart(at)alumni(dot)caltech(dot)edu>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-hackers(at)postgreSQL(dot)org
Subject: Re: UNION JOIN vs UNION SELECT
Date: 2000-08-28 15:51:50
Message-ID: 39AA8A96.198289AC@alumni.caltech.edu (view raw or flat)
Thread:
Lists: pgsql-hackers
> I noticed you've got some really ugly stuff in gram.y to handle
>         SELECT * FROM foo UNION JOIN bar
> I think it's time to bite the bullet and put in a lookahead filter.
> What say you?

*sigh* Probably right. The UNION vs UNION JOIN stuff illustrates it
pretty well. I haven't tried assigning precedence levels to these tokens
or to those subclauses; would that help to resolve the conflicts?

                  - Thomas

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