Added test

Author: aidanharan

CHANGELOG.md

@@ -2,17 +2,17 @@
 
 #### Fixed
 
-- [#1262](https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/pull/1262) Fix distinct alias when multiple databases used
+- [#1262](https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/pull/1262) Fix distinct alias when multiple databases used.
 
 ## v8.0.0
 
 #### Changed
 
-- [#1216](https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/pull/1216) Refactor adapter interface to match abstract adapter
-- [#1225](https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/pull/1225) Drop support to Ruby 3.1
+- [#1216](https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/pull/1216) Refactor adapter interface to match abstract adapter.
+- [#1225](https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/pull/1225) Drop support to Ruby 3.1.
 
 #### Fixed
 
-- [#1215](https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/pull/1215) Fix mismatched foreign key errors
+- [#1215](https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/pull/1215) Fix mismatched foreign key errors.
 
 Please check [7-2-stable](https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/blob/7-2-stable/CHANGELOG.md) for previous changes.

test/cases/adapter_test_sqlserver.rb

@@ -616,4 +616,13 @@ def setup
       assert_equal Task.where("starting < ?", DateTime.current).count, 1
     end
   end
+
+  describe "distinct select query" do
+    it "generated SQL does not contain unnecessary alias projection" do
+      sqls = capture_sql do
+        Post.includes(:comments).joins(:comments).first
+      end
+      assert_no_match(/AS alias_0/, sqls.first)
+    end
+  end
 end