scanner/parser for FOREIGN KEY

Hi,

we still need the enhancement of the scanner/parser combo to
enable FOREIGN KEY specification as column constraint (the
due to shift/reduce disabled NOT DEFERRABLE part).

IMHO this must be done before going into BETA. As discussed,
a little token lookup/queueing between lex and yacc can do
the trick. I'd like to add a slightly generic method for it,
so the lookahead function can be reused if we sometimes get
trapped again with a similar problem.

Do we have a consensus to implement it that way now?

Jan

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