Create an explicit concept of collations that work for any encoding.
Use collencoding = -1 to represent such a collation in pg_collation. We need this to make the "default" entry work sanely, and a later patch will fix the C/POSIX entries to be represented this way instead of duplicating them across all encodings. All lookup operations now search first for an entry that's database-encoding-specific, and then for the same name with collencoding = -1. Also some incidental code cleanup in collationcmds.c and pg_collation.c.
Showing
想要评论请 注册 或 登录