fix: fixed CSM-016

test/bds/csm015_missing_indexes_test.exs

@@ -0,0 +1,75 @@
+defmodule BDS.CSM015MissingIndexesTest do
+  use ExUnit.Case, async: false
+
+  alias BDS.Repo
+
+  setup do
+    :ok = Ecto.Adapters.SQL.Sandbox.checkout(BDS.Repo)
+    :ok
+  end
+
+  defp uses_index?(sql) do
+    {:ok, result} = Ecto.Adapters.SQL.query(Repo, "EXPLAIN QUERY PLAN #{sql}", [])
+
+    Enum.any?(result.rows, fn row ->
+      detail = List.last(row)
+      is_binary(detail) and String.contains?(detail, "INDEX")
+    end)
+  end
+
+  describe "foreign key indexes" do
+    test "media.project_id is indexed" do
+      assert uses_index?("SELECT id FROM media WHERE project_id = 'test'")
+    end
+
+    test "post_media.post_id is indexed" do
+      assert uses_index?("SELECT id FROM post_media WHERE post_id = 'test'")
+    end
+
+    test "post_media.media_id is indexed" do
+      assert uses_index?("SELECT id FROM post_media WHERE media_id = 'test'")
+    end
+
+    test "chat_messages.conversation_id is indexed" do
+      assert uses_index?("SELECT id FROM chat_messages WHERE conversation_id = 'test'")
+    end
+
+    test "embedding_keys.post_id is indexed" do
+      assert uses_index?("SELECT label FROM embedding_keys WHERE post_id = 'test'")
+    end
+
+    test "embedding_keys.project_id is indexed" do
+      assert uses_index?("SELECT label FROM embedding_keys WHERE project_id = 'test'")
+    end
+
+    test "dismissed_duplicate_pairs.project_id is indexed" do
+      assert uses_index?("SELECT id FROM dismissed_duplicate_pairs WHERE project_id = 'test'")
+    end
+
+    test "import_definitions.project_id is indexed" do
+      assert uses_index?("SELECT id FROM import_definitions WHERE project_id = 'test'")
+    end
+  end
+
+  describe "frequently filtered columns" do
+    test "posts.status is indexed" do
+      assert uses_index?("SELECT id FROM posts WHERE status = 'published'")
+    end
+
+    test "posts.published_at is indexed" do
+      assert uses_index?("SELECT id FROM posts WHERE published_at > 0")
+    end
+
+    test "posts.language is indexed" do
+      assert uses_index?("SELECT id FROM posts WHERE language = 'en'")
+    end
+  end
+
+  describe "db_notifications lookup" do
+    test "db_notifications entity_type + entity_id is indexed" do
+      assert uses_index?(
+               "SELECT id FROM db_notifications WHERE entity_type = 'post' AND entity_id = 'test'"
+             )
+    end
+  end
+end