From 9f86462a543252d8be98e5ac66d7b21f612427fa Mon Sep 17 00:00:00 2001
From: Francis Cao <franciscao@gmail.com>
Date: Mon, 3 Aug 2026 16:51:14 -0700
Subject: [PATCH] add CH performance projections

---
 .../14_add_performance_projections.sql        | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 db/clickhouse/migrations/14_add_performance_projections.sql

diff --git a/db/clickhouse/migrations/14_add_performance_projections.sql b/db/clickhouse/migrations/14_add_performance_projections.sql
new file mode 100644
index 000000000..d1ec05d68
--- /dev/null
+++ b/db/clickhouse/migrations/14_add_performance_projections.sql
@@ -0,0 +1,28 @@
+-- Add projections for website activity feeds and event property filters.
+-- Note: these are intentionally not materialized here to avoid a large
+-- backfill during migration on production-sized datasets.
+
+ALTER TABLE umami.website_event
+ADD PROJECTION website_event_activity_projection (
+    SELECT *
+    ORDER BY (
+        website_id,
+        created_at,
+        event_id
+    )
+);
+
+ALTER TABLE umami.event_data
+ADD PROJECTION event_data_property_filter_projection (
+    SELECT *
+    ORDER BY (
+        website_id,
+        data_key,
+        data_type,
+        string_value,
+        number_value,
+        date_value,
+        created_at,
+        event_id
+    )
+);