From 575986a4486aa1a486b6da77b01a3e2e99f5dc51 Mon Sep 17 00:00:00 2001
From: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>
Date: Mon, 6 Apr 2026 15:24:01 -0700
Subject: [PATCH 1/2] perf(db): add published_at composite index for frontend
 listing queries

Adds idx_{table}_deleted_published_id on (deleted_at, published_at DESC, id DESC)
to all ec_* content tables. The frontend listing query orders by published_at but
no existing index covers it, causing full table scans on D1 (~15,883 rows per query
on a 16k post site).

Also registers migration 033 (optimize_content_indexes) which existed on disk but
was missing from the StaticMigrationProvider.

Fixes #277
---
 .../migrations/034_published_at_index.ts      | 29 +++++++++++++++++++
 .../core/src/database/migrations/runner.ts    |  2 ++
 packages/core/src/schema/registry.ts          |  5 ++++
 3 files changed, 36 insertions(+)
 create mode 100644 packages/core/src/database/migrations/034_published_at_index.ts

diff --git a/packages/core/src/database/migrations/034_published_at_index.ts b/packages/core/src/database/migrations/034_published_at_index.ts
new file mode 100644
index 000000000..d7cbc6750
--- /dev/null
+++ b/packages/core/src/database/migrations/034_published_at_index.ts
@@ -0,0 +1,29 @@
+import type { Kysely } from "kysely";
+import { sql } from "kysely";
+
+import { listTablesLike } from "../dialect-helpers.js";
+
+export async function up(db: Kysely<unknown>): Promise<void> {
+	const tableNames = await listTablesLike(db, "ec_%");
+
+	for (const tableName of tableNames) {
+		const table = { name: tableName };
+
+		await sql`
+			CREATE INDEX ${sql.ref(`idx_${table.name}_deleted_published_id`)}
+			ON ${sql.ref(table.name)} (deleted_at, published_at DESC, id DESC)
+		`.execute(db);
+	}
+}
+
+export async function down(db: Kysely<unknown>): Promise<void> {
+	const tableNames = await listTablesLike(db, "ec_%");
+
+	for (const tableName of tableNames) {
+		const table = { name: tableName };
+
+		await sql`DROP INDEX IF EXISTS ${sql.ref(`idx_${table.name}_deleted_published_id`)}`.execute(
+			db,
+		);
+	}
+}
diff --git a/packages/core/src/database/migrations/runner.ts b/packages/core/src/database/migrations/runner.ts
index 838c6b38a..51d43621d 100644
--- a/packages/core/src/database/migrations/runner.ts
+++ b/packages/core/src/database/migrations/runner.ts
@@ -34,6 +34,7 @@ import * as m030 from "./030_widen_scheduled_index.js";
 import * as m031 from "./031_bylines.js";
 import * as m032 from "./032_rate_limits.js";
 import * as m033 from "./033_optimize_content_indexes.js";
+import * as m034 from "./034_published_at_index.js";
 
 const MIGRATIONS: Readonly<Record<string, Migration>> = Object.freeze({
 	"001_initial": m001,
@@ -68,6 +69,7 @@ const MIGRATIONS: Readonly<Record<string, Migration>> = Object.freeze({
 	"031_bylines": m031,
 	"032_rate_limits": m032,
 	"033_optimize_content_indexes": m033,
+	"034_published_at_index": m034,
 });
 
 /** Total number of registered migrations. Exported for use in tests. */
diff --git a/packages/core/src/schema/registry.ts b/packages/core/src/schema/registry.ts
index 97d8a2763..4b6666bac 100644
--- a/packages/core/src/schema/registry.ts
+++ b/packages/core/src/schema/registry.ts
@@ -595,6 +595,11 @@ export class SchemaRegistry {
 			CREATE INDEX ${sql.ref(`idx_${tableName}_deleted_created_id`)}
 			ON ${sql.ref(tableName)} (deleted_at, created_at DESC, id DESC)
 		`.execute(conn);
+
+		await sql`
+			CREATE INDEX ${sql.ref(`idx_${tableName}_deleted_published_id`)}
+			ON ${sql.ref(tableName)} (deleted_at, published_at DESC, id DESC)
+		`.execute(conn);
 	}
 
 	/**

From beefc8ae5e96451277ddbde6c050c756bd9047e2 Mon Sep 17 00:00:00 2001
From: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>
Date: Mon, 6 Apr 2026 15:27:37 -0700
Subject: [PATCH 2/2] docs: add changeset for published_at index

---
 .changeset/shaky-berries-stay.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/shaky-berries-stay.md

diff --git a/.changeset/shaky-berries-stay.md b/.changeset/shaky-berries-stay.md
new file mode 100644
index 000000000..e327c0d07
--- /dev/null
+++ b/.changeset/shaky-berries-stay.md
@@ -0,0 +1,5 @@
+---
+"emdash": patch
+---
+
+Adds composite index on (deleted_at, published_at DESC, id DESC) to eliminate full table scans for frontend listing queries that order by published_at.