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Re: Interval constant syntax, was Re: Interval & check clause

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On 2004.03.29 14:44 Bruno Wolff III wrote:

In postgres you shouldn't have to explicitly cast the constant to an interval as long as there isn't one than one >= operator that could be applied (depending on the eventaul type of the constant). I would really be surprized if this were to happen for >= and an interval operand on one side or the other.

It won't work with two unknown constants, if that was what you tested.
Try just casting on one side.

This is my plpgsql code


 PERFORM MATUREDATES.sname FROM MATUREDATES
    WHERE NEW.sname = MATUREDATES.sname
          AND ( NEW.birth > MATUREDATES.Matured - ''3 years''
                OR NEW.birth > MATUREDATES.Matured - ''7 years'');
  IF FOUND THEN

And this was my scratch psql test:

=> select CAST('1/1/2004' AS date) - '3 years';
ERROR:  Bad date external representation '3 years'

I am using 7.3 so maybe this has been fixed.  Or it's just the
operator, some require casts and some don't and you just have to find
out the hard way.  :(

Karl <kop@meme.com>
Free Software:  "You don't pay back, you pay forward."
                 -- Robert A. Heinlein

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TIP 9: the planner will ignore your desire to choose an index scan if your
     joining column's datatypes do not match

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