With this approach, old GUC names would be recognized in SHOW and SET commands, as well as the other ways you can set a variable by name (postgresql.conf, ALTER USER SET, etc). But only the new names would appear in SHOW ALL or the pg_settings view. Does that seem OK?
Seems OK to me, in fact maybe preferred. But I wonder if we should emit a NOTICE when old names are used with SHOW and SET commands?
Joe
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