From bb56b362a755b5e07dfd364db59e1c02cd21690e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tim=20M=C3=B6hlmann?= <tim+github@zitadel.com>
Date: Fri, 2 May 2025 13:40:22 +0200
Subject: [PATCH] perf(eventstore): add instance position index (#9837)

# Which Problems Are Solved

Some projection queries took a long time to run. It seems that 1 or more
queries couldn't make proper use of the `es_projection` index. This
might be because of a specific complexity aggregate_type and event_type
arguments, making the index unfeasible for postgres.

# How the Problems Are Solved

Following the index recommendation, add and index that covers just
instance_id and position.

# Additional Changes

- none

# Additional Context

- Related to https://github.com/zitadel/zitadel/issues/9832
---
 cmd/setup/54.go  | 27 +++++++++++++++++++++++++++
 cmd/setup/54.sql |  1 +
 2 files changed, 28 insertions(+)
 create mode 100644 cmd/setup/54.go
 create mode 100644 cmd/setup/54.sql

diff --git a/cmd/setup/54.go b/cmd/setup/54.go
new file mode 100644
index 0000000000..3dd2f60abe
--- /dev/null
+++ b/cmd/setup/54.go
@@ -0,0 +1,27 @@
+package setup
+
+import (
+	"context"
+	_ "embed"
+
+	"github.com/zitadel/zitadel/internal/database"
+	"github.com/zitadel/zitadel/internal/eventstore"
+)
+
+var (
+	//go:embed 54.sql
+	instancePositionIndex string
+)
+
+type InstancePositionIndex struct {
+	dbClient *database.DB
+}
+
+func (mig *InstancePositionIndex) Execute(ctx context.Context, _ eventstore.Event) error {
+	_, err := mig.dbClient.ExecContext(ctx, instancePositionIndex)
+	return err
+}
+
+func (mig *InstancePositionIndex) String() string {
+	return "54_instance_position_index"
+}
diff --git a/cmd/setup/54.sql b/cmd/setup/54.sql
new file mode 100644
index 0000000000..1dca8c7575
--- /dev/null
+++ b/cmd/setup/54.sql
@@ -0,0 +1 @@
+CREATE INDEX CONCURRENTLY IF NOT EXISTS es_instance_position ON eventstore.events2 (instance_id, position);