Re: plpgsql: numeric assignment to an integer variable errors out

The following plpgsql function errors out with cvs head:

CREATE function test_assign() returns void
AS
$$ declare x int;
BEGIN
x := 9E3/2;
END
$$ LANGUAGE 'plpgsql';

postgres=# select test_assign();
ERROR:  invalid input syntax for integer: "4500.0000000000000000"
CONTEXT:  PL/pgSQL function "test_assign" line 3 at assignment

We do have an existing cast from numeric to type integer. But here basically we convert the value to string in exec_cast_value before calling int4in. And then use of strtol in pg_atoi leads to this complaint. Guess converting the value to string is not always a good strategy.