From 1c0afb1146faffaf7fcc24ded1b96426c4c0cd92 Mon Sep 17 00:00:00 2001
From: Xiaoying Wang <xiaoying_wang@sfu.ca>
Date: Tue, 8 Oct 2024 13:16:13 -0700
Subject: [PATCH] Update Federation.md

---
 Federation.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Federation.md b/Federation.md
index 27c1039a8..d80824079 100644
--- a/Federation.md
+++ b/Federation.md
@@ -1,2 +1,10 @@
 # Enabling Query Federation
 
+We use [accio](https://github.com/sfu-db/accio) to rewrite a federated query into multiple single-source ones, and combine the result locally with [datafusion](https://github.com/apache/datafusion).
+
+To enable query federation for connectorx:
+1. Clone accio: `git@github.com:sfu-db/accio.git`.
+2. Build accio: `cd accio/rewriter && mvn package -Dmaven.test.skip=true`.
+3. Move the jar file to location `${YOUR_LOCAL_PYTHON_PATH}/site-packages/connectorx/dependencies/federated-rewriter.jar`
+4. Configure accio and set the configuration path as `FED_CONFIG_PATH`. Example configurations can be found [here](https://github.com/sfu-db/accio/tree/main/benchmark/config/tpch10_datafusion/10gbit).
+5. Run federated query using connectorx!