"=?ISO-8859-1?B?UGFuZG9yYQ==?=" <yeyukui@xxxxxx> writes: > The pg_wchar.h file comments "We must avoid renumbering any backend encoding until libpq's major version number is increased beyond 5", Can I add a new server-side encoding, GBK18030, and place it after PG_KOI8U in PG10.6? What is GBK18030? If it's related to either GBK or GB18030, then it'd be unsafe to use as a server encoding because it's not a strict ASCII superset (that is, it has multibyte characters in which not all bytes have the high bit set). The lack of room for a new server encoding in the pg_enc enum has seemed like a mostly hypothetical problem because of that restriction. regards, tom lane
