Invalidate PL/Python functions with composite type argument when the

type changes.

The invalidation will cause the type information to be refetched, and
everything will work.

Jan Urbański, reviewed by Alex Hunsaker

src/pl/plpython/sql/plpython_types.sql

@@ -279,6 +279,49 @@ $$ LANGUAGE plpythonu;
 SELECT * FROM test_type_conversion_array_error();
 
 
+---
+--- Composite types
+---
+
+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 $$
+return e['basesalary'] + e['bonus']
+$$ LANGUAGE plpythonu;
+
+SELECT name, test_composite_table_input(employee.*) FROM employee;
+
+ALTER TABLE employee DROP bonus;
+
+SELECT name, test_composite_table_input(employee.*) FROM employee;
+
+ALTER TABLE employee ADD bonus integer;
+UPDATE employee SET bonus = 10;
+
+SELECT name, test_composite_table_input(employee.*) FROM employee;
+
+CREATE TYPE named_pair AS (
+    i integer,
+    j integer
+);
+
+CREATE OR REPLACE FUNCTION test_composite_type_input(p named_pair) RETURNS integer AS $$
+return sum(p.values())
+$$ LANGUAGE plpythonu;
+
+SELECT test_composite_type_input(row(1, 2));
+
+ALTER TYPE named_pair RENAME TO named_pair_2;
+
+SELECT test_composite_type_input(row(1, 2));
+
+
 --
 -- Prepared statements
 --