Hello
PostgreSQL 14 added the feature: "Allow
SQL-language
functions and
procedures to use
SQL-standard function bodies."
Unfortunately the bodies of such routines are not visible in the column routine_definition of the view INFORMATION_SCHEMA.routines. In case of these routines the field contains the empty string instead of the routine body.
Please observe the difference:
START TRANSACTION;
CREATE OR REPLACE FUNCTION f_fahrenheit_celsius_old(numeric) RETURNS numeric AS $$
SELECT round((($1 - 32.0) * 5.0 / 9.0),3); $$ LANGUAGE sql
IMMUTABLE STRICT LEAKPROOF;
CREATE OR REPLACE FUNCTION f_fahrenheit_celsius_new(numeric) RETURNS numeric
LANGUAGE sql IMMUTABLE STRICT LEAKPROOF
RETURN round((($1 - 32.0) * 5.0 / 9.0),3);
SELECT
routine_schema,
routine_name,
routine_definition
FROM INFORMATION_SCHEMA.routines
WHERE routine_name IN ('f_fahrenheit_celsius_old','f_fahrenheit_celsius_new');
ROLLBACK;
Best regards
Erki Eessaar