Susan Hurst <susan.hurst@brookhurstdata.com> writes:
> What is the trick for displaying column comments in views?
> The query below works as expected when the table_schema includes tables,
> however it shows nothing when the table_schema contains only views.
No surprise, since you're using pg_statio_all_tables as the source of
tables, and that contains, well, only tables.
I'm not quite sure why you'd choose that view anyway. Personally I'd
have gone directly to pg_class, and then probably filtered on relkind
if there were things I didn't want to see. Or you could use
information_schema.tables.
Also, I'm too lazy to check on how information_schema.columns defines
"ordinal_position", but I wonder if it tries to leave out dropped
columns, or might do so in future. That puts this join condition
at risk: "pd.objsubid = c.ordinal_position".
You'd likely be better off to join pg_class and pg_attribute to
pg_description, rather than working with proxies for them.
https://www.postgresql.org/docs/current/catalogs.html
regards, tom lane