DefineCollation() code cleanup
Reorganize the code in DefineCollation() so that the parts using the
FROM clause and the parts not doing so are more cleanly separated. No
functionality change intended.
Reviewed-by: Julien Rouhaud <rjuju123@gmail.com>
Discussion: https://www.postgresql.org/message-id/
29ae752f-80e9-8d31-601c-
62cf01cc93d8@enterprisedb.com