[stable-1] Various backports from community.postgres (#1789)

* postgresql modules: various backports from community.postgresql

* Add postgresql_set community/postgresql/pull/52 backport

* Fix

* Update plugins/modules/database/postgresql/postgresql_set.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update plugins/modules/database/postgresql/postgresql_set.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update changelogs/fragments/1-community-postgresql_backports.yml

Co-authored-by: Felix Fontein <felix@fontein.de>

Co-authored-by: Felix Fontein <felix@fontein.de>

tests/integration/targets/postgresql_query/tasks/postgresql_query_initial.yml

@@ -532,3 +532,68 @@
 - assert:
     that:
     - result is failed
+
+#############################################################################
+# Issue https://github.com/ansible-collections/community.postgresql/issues/45
+- name: Create table containing a decimal value
+  become_user: '{{ pg_user }}'
+  become: true
+  postgresql_query:
+    login_user: '{{ pg_user }}'
+    db: postgres
+    query: CREATE TABLE blabla (id int, num decimal)
+
+- name: Insert data
+  become_user: '{{ pg_user }}'
+  become: true
+  postgresql_query:
+    login_user: '{{ pg_user }}'
+    db: postgres
+    query: INSERT INTO blabla (id, num) VALUES (1, 1::decimal)
+
+- name: Get data
+  become_user: '{{ pg_user }}'
+  become: true
+  postgresql_query:
+    login_user: '{{ pg_user }}'
+    db: postgres
+    query: SELECT * FROM blabla
+  register: result
+
+- assert:
+    that:
+    - result.rowcount == 1
+
+#############################################################################
+# Issue https://github.com/ansible-collections/community.postgresql/issues/47
+- name: Get datetime.timedelta value
+  become_user: '{{ pg_user }}'
+  become: true
+  postgresql_query:
+    login_user: '{{ pg_user }}'
+    db: postgres
+    query: "SELECT EXTRACT(epoch from make_interval(secs => 3))"
+  register: result
+  when: postgres_version_resp.stdout is version('10', '>=')
+
+- assert:
+    that:
+    - result.rowcount == 1
+    - result.query_result[0]["date_part"] == 3
+  when: postgres_version_resp.stdout is version('10', '>=')
+
+- name: Get interval value
+  become_user: '{{ pg_user }}'
+  become: true
+  postgresql_query:
+    login_user: '{{ pg_user }}'
+    db: postgres
+    query: "SELECT make_interval(secs => 3)"
+  register: result
+  when: postgres_version_resp.stdout is version('10', '>=')
+
+- assert:
+    that:
+    - result.rowcount == 1
+    - result.query_result[0]["make_interval"] == "0:00:03"
+  when: postgres_version_resp.stdout is version('10', '>=')