Question

I am using PostgreSQL to store business data in large amount for data warehousing purpose. I am writing views to customize the materialized tables.

I am wondering whether it is possible to set a view not updatable.

I have checked the postgresql manual, but found no specific answer.

Many thanks in advance.

Answer 1

PostgreSQL doesn’t have updatable views, you have to create RULE’s to make this possible. Without these extra rules, you can’t do an update on a view.

From the manual:

What happens if a view is named as the
target relation for an INSERT, UPDATE,
or DELETE? After doing the
substitutions described above, we will
have a query tree in which the result
relation points at a subquery
range-table entry. This will not work,
so the rewriter throws an error if it
sees it has produced such a thing.