1 files changed, 31 insertions, 0 deletions
diff --git a/db/migrate/20210602155056_add_merge_request_diff_commit_users.rb b/db/migrate/20210602155056_add_merge_request_diff_commit_users.rb
new file mode 100644
index 00000000000..f99790e0eca
--- /dev/null
+++ b/db/migrate/20210602155056_add_merge_request_diff_commit_users.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+class AddMergeRequestDiffCommitUsers < ActiveRecord::Migration[6.1]
+  include Gitlab::Database::MigrationHelpers
+
+  disable_ddl_transaction!
+
+  def up
+    create_table_with_constraints :merge_request_diff_commit_users, id: :bigint do |t|
+      t.text :name
+      t.text :email
+
+      t.text_limit :name, 512
+      t.text_limit :email, 512
+
+      t.index [:name, :email], unique: true
+    end
+
+    # Names or Emails can be optional, so in some cases one of these may be
+    # null. But if both are NULL/empty, no row should exist in this table.
+    add_check_constraint(
+      :merge_request_diff_commit_users,
+      "(COALESCE(name, '') != '') OR (COALESCE(email, '') != '')",
+      :merge_request_diff_commit_users_name_or_email_existence
+    )
+  end
+
+  def down
+    drop_table :merge_request_diff_commit_users
+  end
+end