CHANGELOG.md: Add note about ORDER BY

Since we are paging through the results by limit/offset we need to
be sure that we are returning results deterministically.

CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+### Changed
+- Add ORDER BY to /items resource to make sure results are returned
+deterministically
+
 ## [1.3.2] - 2020-11-18
 ### Fixed
 - Minor issue with limit parameter (> 0)

dspace_statistics_api/app.py

@@ -31,7 +31,7 @@ class AllItemsResource:
 
                 # get statistics and use limit and offset to page through results
                 cursor.execute(
-                    "SELECT id, views, downloads FROM items LIMIT %s OFFSET %s",
+                    "SELECT id, views, downloads FROM items ORDER BY id LIMIT %s OFFSET %s",
                     [limit, offset],
                 )