What it turns out is hard to determine is whether the column was stored
externally. To do that you have to rely on the trick of checking
pg_column_size(table.*) and that only works if it's the only column likely to
be stored externally.
-- Gregory Stark EnterpriseDB http://www.enterprisedb.com Get trained by Bruce Momjian - ask me about
EnterpriseDB'sPostgreSQL training!
