The following bug has been logged on the website:
Bug reference: 16549
Logged by: Sławomir Nowakiewicz
Email address: slawomir.nowakiewicz@rubix.com
PostgreSQL version: 12.1
Operating system: Linux
Description:
"CASE" try to cast a string to integer when a condition is not met. I
checked this function also on PostgreSQL 11.2 - the result is the same.
BEGIN;
CREATE TABLE public.temp_data_type
(
data_type_name text NOT NULL,
data_type_storage_type text NOT NULL DEFAULT ''::text
);
INSERT INTO public.temp_data_type
VALUES
('INTEGER','int'),
('LOOKUP_TABLE','string');
CREATE OR REPLACE FUNCTION public.temp_item_attribute_create(p_datatype
text, p_values text[])
RETURNS integer
LANGUAGE 'plpgsql'
VOLATILE
AS $BODY$
DECLARE
value_int integer;
i integer;
BEGIN
i:=1;
--RAISE NOTICE 'datatype: %', p_datatype;
--RAISE NOTICE 'attribute.values[i]: %',p_values[i];
value_int := CASE WHEN p_datatype::TEXT IN (SELECT data_type_name FROM
temp_data_type WHERE data_type_storage_type = 'int') THEN
p_values[i]::INTEGER
ELSE
NULL::INTEGER
END;
RETURN value_int;
END;
$BODY$;
ALTER FUNCTION public.temp_item_attribute_create(text,text[])
OWNER TO postgres;
SELECT temp_item_attribute_create('LOOKUP_TABLE','{SHELL}');
--ROLLBACK;
ERROR: 22P02: invalid input syntax for type integer: "SHELL"
CONTEXT: SQL statement "SELECT CASE WHEN p_datatype::TEXT IN (SELECT
data_type_name FROM temp_data_type WHERE data_type_storage_type = 'int')
THEN
p_values[i]::INTEGER
ELSE
NULL::INTEGER
END"
PL/pgSQL function temp_item_attribute_create(text,text[]) line 10 at
assignment
LOCATION: pg_strtoint32, numutils.c:259
