Filter bigint values on insert Postgresql - postgresql

Question

I have 2 tables in Postgresql with the same schema, the only difference is that in one of the table id field is of type bigint. Schema of the table I need to fill with data looks like this:
create table test_int_table(
id int,
description text,
hash_code int
);
I need to copy the data from test_table with bigint id to public.test_int_table. And some of the values which are bigger than id range should be filtered out. How can I track those values without hardcoding the range?
I can do something like this, but I would like to build more generic solution:
insert into test_int_table
select * from test_table as test
where test.id not between 2147483647 and 9223372036854775808
By generic I mean without constraints on the columns names and their number. So that in case, I have multiple columns of bigint type in other tables how can I filter all of their columns values generically (without specifying a column name)?

Answer 1

There is no generic solution, as far as I can tell.
But I would write it as
INSERT INTO test_int_table
SELECT *
FROM test_table AS t
WHERE t.id BETWEEN -2147483647 AND 2147483647;

Answer 2

You can do something like this if you want to track :
Create a function like this :
CREATE OR REPLACE FUNCTION convert_to_integer(v_input bigint)
RETURNS INTEGER AS $$
DECLARE v_int_value INTEGER DEFAULT NULL;
BEGIN
BEGIN
v_int_value := v_input::INTEGER;
EXCEPTION WHEN OTHERS THEN
RAISE NOTICE 'Invalid integer value: "%". Returning NULL.', v_input;
RETURN NULL;
END;
RETURN v_int_value;
END;
$$ LANGUAGE plpgsql;
and write a query like this :
INSERT INTO test_int_table SELECT * FROM test_table AS t WHERE convert_to_integer(t.id) is not null;
Or you can modify a function to return 0.