Horton

Re: [HACKERS] subquery syntax broken

Vadim B. Mikheev <vadim@sable.krasnoyarsk.su>

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From: "Vadim B. Mikheev" <vadim@sable.krasnoyarsk.su>
To: "Thomas G. Lockhart" <lockhart@alumni.caltech.edu>
Cc: Bruce Momjian <maillist@candle.pha.pa.us>, hackers@postgresql.org
Date: 1998-02-03T08:34:58Z
Lists: pgsql-hackers 
Thomas G. Lockhart wrote:
> 
> > I believe it has to do with the fact that '=' has right precedence.
> > Thomas, can you comment.  Maybe we need to %right 'Op' at that point so
> > it doesn't shift too early?
> 
> No, the single-character operators each need their own code in the parser.
> Check near line 2980 in the parser for examples from the "a_expr" syntax. You
> just need to replicate the subselect "Op" definition blocks and substitute
> each of '=', '<', and '>' in the copies. The existing "Op" code handles the

Don't forget about ALL/ANY modifiers, too...

> multi-character operators such as '<=' and '>='...

Vadim