Tom Lane 14f67192c2 Remove assumptions that not-equals operators cannot be in any opclass. ...

get_op_btree_interpretation assumed this in order to save some duplication
of code, but it's not true in general anymore because we added <> support
to btree_gist.  (We still assume it for btree opclasses, though.)

Also, essentially the same logic was baked into predtest.c.  Get rid of
that duplication by generalizing get_op_btree_interpretation so that it
can be used by predtest.c.

Per bug report from Denis de Bernardy and investigation by Jeff Davis,
though I didn't use Jeff's patch exactly as-is.

Back-patch to 9.1; we do not support this usage before that.

2011-07-06 14:53:16 -04:00

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