Bug reference: 14545 Logged by: Prajval Poojari Email address: ppoojari@erwin.com PostgreSQL version: 9.5.6 Operating system: Windows 10 Pro Description:
Hi i ran a simple select query as "select pa.parameter_mode from information_schema as pa where pa.parameter_mode = 'VARIADIC' " and the DB returned me a null list. I had already created a function with the parameter mode as VARIADIC. Just wondering if there is some other specific way to retrieve this mode.
I just get an error when I try that - I think you are missing the "parameters" table specification.
CREATE FUNCTION variadictest(VARIADIC vargs text[])
RETURNS text
AS $$
SELECT 'test'::text;
$$
LANGUAGE sql;
# select data_type from information_schema.parameters WHERE specific_name ~ 'variadictest';
-> "ARRAY"
While imperfect locating any ARRAY data_type argument positioned last would be accurate if potentially imprecise (i.e., possible false positives).
There may be (probably is) a PostgreSQL-specific catalog that will contain the desired level of detail. Information Schema is "least common denominator" in nature which may explain the lack of specificity here.
