Woah, I just realized it's much worse than that. I think the syntax in the
ANSI is not parsable in LALR(1) at all. Note the following:
WITH RECURSIVE foo (a,b) AS (subq) SEARCH BREADTH FIRST BY a,b,c(x,z),d(y,z) AS (subq) SELECT ...
To determine whether "c" is the name of a new <with list element> it has to
scan as far ahead as the "," before the "d". Note that "d" here is in fact not
part of the <search clause> at all, it's the name of a second <with list
element>.
bleagh.
--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com