Обсуждение: is_nullable column of information_schema.columns table
The following documentation comment has been logged on the website: Page: https://www.postgresql.org/docs/12/infoschema-columns.html Description: is_nullable column of information_schema.columns table does not show correct values for columns of views. For tables that column shows correct values whether a column is nullable or not. I think the documentation should include this information although better solution is to correct that error.
On Sat, Dec 28, 2019 at 08:19:51PM +0000, PG Doc comments form wrote: > The following documentation comment has been logged on the website: > > Page: https://www.postgresql.org/docs/12/infoschema-columns.html > Description: > > is_nullable column of information_schema.columns table does not show correct > values for columns of views. For tables that column shows correct values > whether a column is nullable or not. I think the documentation should > include this information although better solution is to correct that error. Can you show us an example query with the output? Thanks. Also, which Postgres version? -- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + As you are, so once was I. As I am, so you will be. + + Ancient Roman grave inscription +
On Sat, 2019-12-28 at 20:19 +0000, PG Doc comments form wrote: > Page: https://www.postgresql.org/docs/12/infoschema-columns.html > Description: > > is_nullable column of information_schema.columns table does not show correct > values for columns of views. For tables that column shows correct values > whether a column is nullable or not. I think the documentation should > include this information although better solution is to correct that error. All columns of a view are defined as nullable, whether they can assume that value or not. PostgreSQL does not attempt to deduce the nullability of columns from the view definition. So the information in information_schema.columns is correct. Remember that nullability does not imply that there are actually NULL values. Yours, Laurenz Albe -- Cybertec | https://www.cybertec-postgresql.com