postgresql_privs: fix the module mistakes a procedure for a function (#996)

* postgresql_privs: fix the module mistakes a procedure for a function

* add changelog fragment

* fix

changelogs/fragments/996-postgresql_privs_fix_function_handling.yml

@@ -0,0 +1,2 @@
+bugfixes:
+- postgresql_privs - fix the module mistakes a procedure for a function (https://github.com/ansible-collections/community.general/issues/994).

plugins/modules/database/postgresql/postgresql_privs.py

@@ -514,6 +514,7 @@ class Connection(object):
 
         self.connection = psycopg2.connect(**kw)
         self.cursor = self.connection.cursor()
+        self.pg_version = self.connection.server_version
 
     def commit(self):
         self.connection.commit()
@@ -561,10 +562,15 @@ class Connection(object):
     def get_all_functions_in_schema(self, schema):
         if not self.schema_exists(schema):
             raise Error('Schema "%s" does not exist.' % schema)
-        query = """SELECT p.proname, oidvectortypes(p.proargtypes)
-                    FROM pg_catalog.pg_proc p
-                    JOIN pg_namespace n ON n.oid = p.pronamespace
-                    WHERE nspname = %s"""
+
+        query = ("SELECT p.proname, oidvectortypes(p.proargtypes) "
+                 "FROM pg_catalog.pg_proc p "
+                 "JOIN pg_namespace n ON n.oid = p.pronamespace "
+                 "WHERE nspname = %s")
+
+        if self.pg_version >= 110000:
+            query += " and p.prokind = 'f'"
+
         self.cursor.execute(query, (schema,))
         return ["%s(%s)" % (t[0], t[1]) for t in self.cursor.fetchall()]
 
@@ -1120,7 +1126,7 @@ def main():
 
     except psycopg2.Error as e:
         conn.rollback()
-        module.fail_json(msg=to_native(e.message))
+        module.fail_json(msg=to_native(e))
 
     if module.check_mode or not changed:
         conn.rollback()

tests/integration/targets/postgresql_privs/tasks/postgresql_privs_general.yml

@@ -653,6 +653,35 @@
     login_user: "{{ db_user3 }}"
     login_password: password
 
+# Issue https://github.com/ansible-collections/community.general/issues/994
+- name: Create a procedure for tests
+  postgresql_query:
+    query: "CREATE PROCEDURE mock_procedure() LANGUAGE SQL AS $$ SELECT 1; $$;"
+    db: "{{ db_name }}"
+    login_user: "{{ db_user3 }}"
+    login_password: password
+  when: postgres_version_resp.stdout is version('11', '>=')
+
+# Issue https://github.com/ansible-collections/community.general/issues/994
+- name: Try to run module against a procedure, not function
+  postgresql_privs:
+    type: function
+    state: present
+    privs: ALL
+    roles: "{{ db_user2 }}"
+    objs: ALL_IN_SCHEMA
+    schema: public
+    db: "{{ db_name }}"
+    login_user: "{{ db_user3 }}"
+    login_password: password
+  register: result
+  when: postgres_version_resp.stdout is version('11', '>=')
+
+- assert:
+    that:
+    - result is not changed
+  when: postgres_version_resp.stdout is version('11', '>=')
+
 #################################################
 # Test ALL_IN_SCHEMA for 'partioned tables type #
 #################################################