Alvaro Herrera <alvhe...@alvh.no-ip.org> writes: > Do we *have* to provide support for arbitrary numbers of digits, though? > We could provide support for only %.3t and %.6t specifically, and not > worry about other cases (error: width not supported).
If I were coding it, I would allow only exactly 1 digit (%.Nt) to simplify the parsing side of things and bound the required buffer size. Without having written it, it's not clear to me whether further restricting the set of supported values would save much code. I will point out, though, that throwing an error during log_line_prefix processing will lead straight to infinite recursion. regards, tom lane