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Concat two int values ​​in postgresql

I have 7 integer values ​​(with 3,1,3,4,4,5,4 digits respectively), and I have to combine them into a single integer (i.e. a 24-digit number). I tried to do it like this

create or replace function gen_id(int,int,int,int,int,int,int) returns bigint as $$
declare
    id bigint;
begin
    id = $1 * 1000000000000000000000 + $2 * 100000000000000000000 + $3 * 100000000000000000 + $4 * 10000000000000 + $5 * 1000000000 + $6 * 10000 + $7;
    return id;
end;
$$ language plpgsql;

select * from gen_id(100,1,101,1000,1001,10001,1000);

But when I execute it, I get the error: bigint is out of range. Is there any other better way to do this?
thank

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2 answers

What about:

SELECT CAST(CAST(num1 AS text)||CAST(num2 AS text)||... AS numeric(24,0))

If you have your identifiers in some table, you can do:

SELECT CAST(string_agg(CAST(num AS text), '') AS numeric(24,0)) FROM srctab;
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How can I combine a string into an integer

SELECT REPLACE(STR(ISNULL(MAX(usuarioid) + 1, 1), 6), ' ', '0') FROM usuarios

usuarioid - line + 1

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