Aggregate operation of user-defined type cannot be specified

[nuko-yokohama]

Aggregate operation of user-defined type cannot be specified (commit e150d964df7e3aeb768e4bae35d15764f8abd284)

A SELECT statement using the MIN() and MAX() functions can be executed on a user-defined type column that implements the aggregate functions MIN () and MAX (). However, if the same SELECT statement is specified in the AS clause of CREATE INCREMENTAL MATERIALIZED VIEW, the following error will occur.

SELECT MIN(data) data_min, MAX(data) data_max FROM foo;
 data_min | data_max
----------+----------
 1/3      | 2/3
(1 row)

CREATE INCREMENTAL MATERIALIZED VIEW foo_min_imv AS SELECT MIN(data) data_min FROM foo;
psql:extension-agg.sql:14: ERROR:  aggregate function min is not supported
CREATE INCREMENTAL MATERIALIZED VIEW foo_max_imv AS SELECT MAX(data) data_max FROM foo;
psql:extension-agg.sql:15: ERROR:  aggregate function max is not supported

Does query including user-defined type aggregate operation not supported by INCREMENTAL MATERIALIZED VIEW?

An execution example is shown below.

[ec2-user@ip-10-0-1-10 ivm]$ cat extension-agg.sql
--
-- pg_fraction: https://github.com/nuko-yokohama/pg_fraction
--
DROP EXTENSION IF EXISTS pg_fraction CASCADE;
DROP TABLE IF EXISTS foo CASCADE;

CREATE EXTENSION IF NOT EXISTS pg_fraction;
\dx
\dT+ fraction

CREATE TABLE foo (id int, data fraction);
INSERT INTO foo (id, data) VALUES (1,'2/3'),(2,'1/3'),(3,'1/2');
SELECT MIN(data) data_min, MAX(data) data_max FROM foo;
CREATE INCREMENTAL MATERIALIZED VIEW foo_min_imv AS SELECT MIN(data) data_min FROM foo;
CREATE INCREMENTAL MATERIALIZED VIEW foo_max_imv AS SELECT MAX(data) data_max FROM foo;

SELECT MIN(id) id_min, MAX(id) id_max FROM foo;
CREATE INCREMENTAL MATERIALIZED VIEW foo_id_imv AS SELECT MIN(id) id_min, MAX(id) id_max FROM foo;

Best regards.

[nuko-yokohama]

The improvement of the message was confirmed. Thanks.