diff --git a/keyserver/src/responders/website-responders.js b/keyserver/src/responders/website-responders.js
--- a/keyserver/src/responders/website-responders.js
+++ b/keyserver/src/responders/website-responders.js
@@ -95,6 +95,7 @@
   +cssInclude: string,
   +olmFilename: string,
   +sqljsFilename: string,
+  +commQueryExecutorFilename: string,
   +opaqueURL: string,
 };
 let assetInfo: ?AssetInfo = null;
@@ -110,6 +111,7 @@
       cssInclude: '',
       olmFilename: '',
       sqljsFilename: '',
+      commQueryExecutorFilename: '',
       opaqueURL: 'http://localhost:8080/opaque-ke.wasm',
     };
     return assetInfo;
@@ -134,6 +136,7 @@
       `,
       olmFilename: manifest['olm.wasm'],
       sqljsFilename: webworkersManifest['sql-wasm.wasm'],
+      commQueryExecutorFilename: webworkersManifest['comm_query_executor.wasm'],
       opaqueURL: `compiled/${manifest['comm_opaque2_wasm_bg.wasm']}`,
     };
     return assetInfo;
@@ -494,8 +497,15 @@
     };
   })();
 
-  const { jsURL, fontsURL, cssInclude, olmFilename, sqljsFilename, opaqueURL } =
-    await assetInfoPromise;
+  const {
+    jsURL,
+    fontsURL,
+    cssInclude,
+    olmFilename,
+    sqljsFilename,
+    opaqueURL,
+    commQueryExecutorFilename,
+  } = await assetInfoPromise;
 
   // prettier-ignore
   res.write(html`
@@ -604,6 +614,7 @@
           var baseURL = "${baseURL}";
           var olmFilename = "${olmFilename}";
           var sqljsFilename = "${sqljsFilename}";
+          var commQueryExecutorFilename = "${commQueryExecutorFilename}";
           var opaqueURL = "${opaqueURL}";
         </script>
         <script src="${jsURL}"></script>
diff --git a/web/database/database-module-provider.js b/web/database/database-module-provider.js
--- a/web/database/database-module-provider.js
+++ b/web/database/database-module-provider.js
@@ -11,6 +11,7 @@
 } from '../types/worker-types.js';
 
 declare var sqljsFilename: string;
+declare var commQueryExecutorFilename: string;
 declare var preloadedState: AppState;
 
 const databaseStatuses = Object.freeze({
@@ -59,6 +60,7 @@
           sqljsFilePath: `${origin}${SQLJS_FILE_PATH}`,
           sqljsFilename,
           encryptionKey,
+          commQueryExecutorFilename,
         });
         this.status = databaseStatuses.initSuccess;
         console.info('Database initialization success');
diff --git a/web/database/worker/db-worker.js b/web/database/worker/db-worker.js
--- a/web/database/worker/db-worker.js
+++ b/web/database/worker/db-worker.js
@@ -19,6 +19,7 @@
   type WorkerRequestProxyMessage,
   workerWriteRequests,
 } from '../../types/worker-types.js';
+import Module from '../_generated/comm-query-executor.js';
 import { migrate, setupSQLiteDB } from '../queries/db-queries.js';
 import {
   getAllDrafts,
@@ -59,11 +60,30 @@
 let persistNeeded: boolean = false;
 let persistInProgress: boolean = false;
 
+const defaultCommQueryExecutorFilename = 'comm_query_executor.wasm';
+
 async function initDatabase(
   sqljsFilePath: string,
   sqljsFilename: ?string,
+  commQueryExecutorFilename: ?string,
   encryptionKeyJWK?: ?SubtleCrypto$JsonWebKey,
 ) {
+  const dbModule = Module({
+    locateFile: function () {
+      if (commQueryExecutorFilename) {
+        return `${sqljsFilePath}/${commQueryExecutorFilename}`;
+      }
+      return `${sqljsFilePath}/${defaultCommQueryExecutorFilename}`;
+    },
+  });
+
+  try {
+    const result = dbModule.CommQueryExecutor.testDBOperation();
+    console.log(result);
+  } catch (e) {
+    console.error(e);
+  }
+
   if (encryptionKeyJWK) {
     encryptionKey = await importJWKKey(encryptionKeyJWK);
   } else {
@@ -210,6 +230,7 @@
     await initDatabase(
       message.sqljsFilePath,
       message.sqljsFilename,
+      message.commQueryExecutorFilename,
       message.encryptionKey,
     );
     return undefined;
diff --git a/web/types/worker-types.js b/web/types/worker-types.js
--- a/web/types/worker-types.js
+++ b/web/types/worker-types.js
@@ -36,6 +36,7 @@
   +type: 1,
   +sqljsFilePath: string,
   +sqljsFilename: ?string,
+  +commQueryExecutorFilename: ?string,
   +encryptionKey?: ?SubtleCrypto$JsonWebKey,
 };