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ec59b6deb8
constant ORDER/GROUP BY entries properly: http://archives.postgresql.org/pgsql-hackers/2001-04/msg00457.php The original solution to that was in fact no good, as demonstrated by today's report from Martin Pitt: http://archives.postgresql.org/pgsql-bugs/2008-01/msg00027.php We can't use the column-number-reference format for a constant that is a resjunk targetlist entry, a case that was unfortunately not thought of in the original discussion. What we can do instead (which did not work at the time, but does work in 7.3 and up) is to emit the constant with explicit ::typename decoration, even if it otherwise wouldn't need it. This is sufficient to keep the parser from thinking it's a column number reference, and indeed is probably what the user must have done to get such a thing into the querytree in the first place. |
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