presto-main/src/main/java/io/prestosql/operator/scalar/ConcatFunction.java/ConcatFunction/checkedAdd
class ConcatFunction:    @UsedByGeneratedCode
    public static int checkedAdd(int x, int y)
    {
        try {
            return addExact(x, y);
        }
        catch (ArithmeticException e) {
            throw new PrestoException(INVALID_FUNCTION_ARGUMENT, "Concatenated string is too large");
        }
    }