| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov> |
| Cc: | "Robert Haas" <robertmhaas(at)gmail(dot)com>, "Pavel Stehule" <pavel(dot)stehule(at)gmail(dot)com>, "PostgreSQL Hackers" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Proposal: plpgsql - "for in array" statement |
| Date: | 2010-09-28 16:35:05 |
| Message-ID: | 7652.1285691705@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
"Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov> writes:
>>>> FOR var IN [array variable | array expression]
>>>> LOOP
> How about distinguishing it this way:?
> FOR var IN ARRAY array_expression LOOP
That occurred to me too, but it's got a small problem: it's not
impossible for ARRAY to be the first token of a valid scalar expression.
But I guess you could get around that if you had to by putting the ARRAY
expression inside parens, and it would be a pretty darn unusual case
anyway. So this is probably the best choice. I'm not thrilled with
David's suggestions of using FOREACH or ITERATE --- using a different
initial keyword makes it awkward to make generic statements about "all
types of FOR loop".
regards, tom lane
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