At 12:15 PM 12/08/2004, Tom Lane wrote:
>You might need to bite the bullet and implement a flex
>lexer.
I'd like to avoid this if I can; AFAICT, for statement detection on
pg_restore, I can require white space before the $tag. Since I also skip
over all quoted text, the bodies of functions are ignored. The only issues
will be attribute names with ' $' in them, but they will be quoted as well
(so ignored).
So to recognize a tag, I look for a '$' after white space, and assume it's
a tag start. If I subsequently read an invalid tag char, I just go back
into scan mode on that character and assume the '$...' was some other valid
sql element.
From other threads, it sounds like removing the statement detection code
entirely is not an option.
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