Обсуждение: INFORMATION_SCHEMA.routine_column_usage
Hello
Here
it is stated that "The view
routine_column_usage is meant to identify all columns that are used by a function or procedure. This information is currently not tracked by PostgreSQL."However, this claim is incorrect because the view provides information about the column usage of SQL functions that have SQL-standard function body.
CREATE TABLE Person (person_id SERIAL,
given_name VARCHAR(50) NOT NULL,
reg_time TIMESTAMP(0) NOT NULL DEFAULT LOCALTIMESTAMP(0),
CONSTRAINT pk_person PRIMARY KEY (person_id));
CREATE FUNCTION f_reg_person(p_given_name Person.given_name%TYPE)
RETURNS Person.person_id%TYPE
LANGUAGE SQL SECURITY DEFINER
BEGIN ATOMIC
INSERT INTO Person (given_name) VALUES (p_given_name)
RETURNING person_id;
END;
SELECT * FROM Information_schema.routine_column_usage;
Returns information about two columns - person_id and given_name.
Perhaps the better wording is:
The view
routine_column_usage is meant to identify all columns that are used by a function or procedure. This information is tracked by PostgreSQL in case of routines that have SQL-standard function body.Best regards
Erki Eessaar
> Here > https://www.postgresql.org/docs/current/infoschema-routine-column-usage.html <https://www.postgresql.org/docs/current/infoschema-routine-column-usage.html> > > it is stated that "The view |routine_column_usage| is meant to identify > all columns that are used by a function or procedure. This information > is currently not tracked by PostgreSQL." > > However, this claim is incorrect because the view provides information > about the column usage of SQL functions that have SQL-standard function > body. Correct, the documentation was not updated when this was added. A few other views are similarly affected. How about this attached patch.
Вложения
On 29.11.23 15:01, Peter Eisentraut wrote: >> Here >> https://www.postgresql.org/docs/current/infoschema-routine-column-usage.html <https://www.postgresql.org/docs/current/infoschema-routine-column-usage.html> >> >> it is stated that "The view |routine_column_usage| is meant to >> identify all columns that are used by a function or procedure. This >> information is currently not tracked by PostgreSQL." >> >> However, this claim is incorrect because the view provides information >> about the column usage of SQL functions that have SQL-standard >> function body. > > Correct, the documentation was not updated when this was added. A few > other views are similarly affected. How about this attached patch. Fix committed.