ERROR when table defination changes

[BaiShaoqi]

Expected behavior

 name | test_composite_table_input
------+----------------------------
 John |                        110
 Mary |                        210
(2 rows)

ERROR:  KeyError: 'bonus' (plpython.c:4960)  (seg0 slice1 10.152.10.139:25432 pid=5868) (cdbdisp.c:254)
DETAIL:
Traceback (most recent call last):
  PL/Python function "test_composite_table_input", line 2, in <module>
    return e['basesalary'] + e['bonus']
PL/Python function "test_composite_table_input"

Actual behavior

name | test_composite_table_input
------+----------------------------
Mary |                        210
John |                        110
(2 rows)

name | test_composite_table_input
------+----------------------------
John |                        110
Mary |                        210
(2 rows)

Step to reproduce the behavior

CREATE TABLE employee (
    name text,
    basesalary integer,
    bonus integer
);

INSERT INTO employee VALUES ('John', 100, 10), ('Mary', 200, 10);

CREATE OR REPLACE FUNCTION test_composite_table_input(e employee) RETURNS integer AS $$
# container: plc_python_shared
return e['basesalary'] + e['bonus']
$$ LANGUAGE plcontainer;

SELECT name, test_composite_table_input(employee.*) FROM employee;

ALTER TABLE employee DROP bonus;

SELECT name, test_composite_table_input(employee.*) FROM employee;