Bruce Momjian <> writes:
> Oh, I didn't realize lexers would choose the longer token when given
> multiple options.

See lines 95-100 in scan.l:

 * OK, here is a short description of lex/flex rules behavior.
 * The longest pattern which matches an input string is always chosen.
 * For equal-length patterns, the first occurring in the rules list is chosen.
 * INITIAL is the starting state, to which all non-conditional rules apply.
 * Exclusive states change parsing rules while the state is active.  When in
 * an exclusive state, only those rules defined for that state apply.

                        regards, tom lane

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