Re: Unqualified name not resolved in function called from materialized view (17.4)

On Tue, 2025-03-11 at 19:45 +1100, Peter Wright wrote:
> PostgreSQL version: 17.4
> Operating system: Ubuntu 24.04, x86_64, kernel 6.8.0-51-generic
> Description:
> 
> Given a file "break_it.sql" containing this SQL:
> 
>   SELECT version();
>   CREATE VIEW things AS SELECT 1 AS id, 'rock' AS thing_name;
>   CREATE FUNCTION num_things() RETURNS INTEGER AS $$ SELECT COUNT(1) FROM things; $$ LANGUAGE SQL STABLE;
>   CREATE MATERIALIZED VIEW thing_report AS SELECT num_things() AS number_of_things;
> 
> Running the following commands with the environment pointing at a PostgreSQL 17.4 server:
> 
>   psql:break_it.sql:4: ERROR:  relation "things" does not exist
>   LINE 1:  SELECT COUNT(1) FROM things;
>                                 ^
>   QUERY:   SELECT COUNT(1) FROM things;
>   CONTEXT:  SQL function "num_things" during inlining
> 
> 
> Running the same commands with the environment pointing at a PostgreSQL 16.8
> server does *not* report an error

That is not a bug, it is intentional.
See the first entry in the list of incompatibilities
https://www.postgresql.org/docs/current/release-17.html#RELEASE-17-MIGRATION

You should fix the function.

Yours,
Laurenz Albe