Chris Storah <cstorah(at)emis-support(dot)demon(dot)co(dot)uk> writes:
> If not, can anyone point me in the direction of the code that does the
> parsing so I can take a look - if this would be helpful!
src/backend/parser/gram.y. If you find that anything more can be moved
out of the truly-reserved or ColLabel categories and added to the ColId
category, let us know! But I think everything that's in ColLabel is
there because you get parsing conflicts otherwise ...
regards, tom lane