Added indices for entities related tables (getodk#726)

Co-authored-by: Kathleen Tuite <[email protected]>

Author: sadiqkhoja

lib/model/migrations/20230126-01-add-entity-indices.js

@@ -0,0 +1,34 @@
+// Copyright 2023 ODK Central Developers
+// See the NOTICE file at the top-level directory of this distribution and at
+// https://github.com/getodk/central-backend/blob/master/NOTICE.
+// This file is part of ODK Central. It is subject to the license terms in
+// the LICENSE file found in the top-level directory of this distribution and at
+// https://www.apache.org/licenses/LICENSE-2.0. No part of ODK Central,
+// including this file, may be copied, modified, propagated, or distributed
+// except according to the terms contained in the LICENSE file.
+
+const up = async (db) => {
+  await db.schema.table('entities', (en) => {
+    en.index([ 'datasetId', 'createdAt', 'id' ]);
+  });
+
+  await db.schema.table('entity_defs', (ed) => {
+    ed.index(['entityId', 'current']);
+    ed.index('submissionDefId');
+  });
+};
+
+
+const down = async (db) => {
+  await db.schema.table('entities', (en) => {
+    en.dropIndex([ 'datasetId', 'createdAt', 'id' ]);
+  });
+
+  await db.schema.table('entity_defs', (ed) => {
+    ed.dropIndex(['entityId', 'current']);
+    ed.dropIndex('submissionDefId');
+  });
+};
+
+module.exports = { up, down };
+