I was going to ask you about the `n` methods. Is there some constant in the postgres code I can pass as the `size_t n` for these methods? I know this is a security risk (and, yes, in this case I was just copying the existing structure), but I also didn't want to introduce a one-off limitation on token length if it didn't exist elsewhere in postgres.

Maybe there's some limit on identifiers I can use as the limit on the length of string comparisons?