1 files changed, 19 insertions, 0 deletions
diff --git a/db/migrate/20190910103144_replace_events_index_on_group_id_with_partial_index.rb b/db/migrate/20190910103144_replace_events_index_on_group_id_with_partial_index.rb
new file mode 100644
index 00000000000..40a7454fd20
--- /dev/null
+++ b/db/migrate/20190910103144_replace_events_index_on_group_id_with_partial_index.rb
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class ReplaceEventsIndexOnGroupIdWithPartialIndex < ActiveRecord::Migration[5.2]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index(:events, :group_id, where: 'group_id IS NOT NULL', name: 'index_events_on_group_id_partial')
+    remove_concurrent_index_by_name(:events, 'index_events_on_group_id')
+  end
+
+  def down
+    add_concurrent_index(:events, :group_id, name: 'index_events_on_group_id')
+    remove_concurrent_index_by_name(:events, 'index_events_on_group_id_partial')
+  end
+end