BUG #18097: Immutable expression not allowed in generated at
От | PG Bug reporting form |
---|---|
Тема | BUG #18097: Immutable expression not allowed in generated at |
Дата | |
Msg-id | 18097-ebb179674f22932f@postgresql.org обсуждение исходный текст |
Ответы |
Re: BUG #18097: Immutable expression not allowed in generated at
|
Список | pgsql-bugs |
The following bug has been logged on the website: Bug reference: 18097 Logged by: Jim Keener Email address: jim@jimkeener.com PostgreSQL version: 15.0 Operating system: Linux Description: Given this table: CREATE TABLE test_table ( id bigint GENERATED ALWAYS AS IDENTITY PRIMARY KEY, created_at timestamptz NOT NULL DEFAULT now() ); The following work: * alter table test_table add created_local_y text GENERATED ALWAYS AS (EXTRACT(isoyear FROM created_at AT TIME ZONE 'America/New_York')) STORED; * alter table test_table add created_local_w text GENERATED ALWAYS AS (EXTRACT(week FROM created_at AT TIME ZONE 'America/New_York')) STORED; * alter table test_table add created_local text GENERATED ALWAYS AS (EXTRACT(isoyear FROM created_at AT TIME ZONE 'America/New_York')::text || '|' || EXTRACT(week FROM created_at AT TIME ZONE 'America/New_York')::text) STORED; * CREATE INDEX ON test_table ((EXTRACT(isoyear FROM created_at AT TIME ZONE 'America/New_York') || '|' || EXTRACT(week FROM created_at AT TIME ZONE 'America/New_York'))); However, the following DOES NOT work with an error of (ERROR: generation expression is not immutable): * alter table test_table add created_local text GENERATED ALWAYS AS (EXTRACT(isoyear FROM created_at AT TIME ZONE 'America/New_York') || '|' || EXTRACT(week FROM created_at AT TIME ZONE 'America/New_York')) STORED; Given that casting shouldn't "increase" the immutability of an expression, and expression indexes need also be immutable afaik, I think that there is a bug somewhere here? Thank you, Jim
В списке pgsql-bugs по дате отправления: