> ## Documentation Index
> Fetch the complete documentation index at: https://docs.bytebase.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Bytebase 3.18.1 - May 28, 2026

> Improvements and Bug Fixes

## 🎄 Enhancements

* **Plan detail page improvements.**

  * **Refreshed layout.** Cleaner layout with at-a-glance plan-check status across all specs and consistent database-target display through every phase.
  * **Release-backed plan flow simplified.** Release-backed (GitOps) plans now show only two phases — CHANGES and DEPLOY — with minor UI refinements throughout.

* **SaaS: MCP discovery works against Bytebase Cloud.** MCP clients (Claude Code, Cursor, etc.) can now complete the OAuth flow against `cloud.bytebase.com` without manual configuration.

* **PostgreSQL** — Compatible with pgbouncer transaction pooling (statement cache disabled) and PostgreSQL 18 (built-ins like `uuidv7()` and 80+ others are recognized by SQL analysis and schema diff).

* **TiDB** — DML rollback / prior-backup preview now works. Queries against columns added out-of-band trigger the standard metadata-resync-and-retry path (matching MySQL / PostgreSQL).

* **gh-ost migrations honor the configured data-source SSH tunnel** for both the MySQL connection and the binlog reader.

* **Query data source** — Non-read-only automatic SQL Editor queries now use the admin data source when the query data policy allows it. Read-only queries are unaffected.

* **Demo mode removed.** The `--demo` server flag has been removed. This mode was for internal demos (it loads a baked-in SQL dump and a sample admin) and was never intended for production use — if you have `--demo` in your startup script, drop it and configure instances and users normally.

## 🐞 Bug Fixes

* Workload identities are distinguished from service accounts in the members table, and the graphical CEL expression editor is restored for project member role grants.

* Large target sets in the issue / plan target overflow view no longer freeze or mis-render.

* The plan list creator filter actually returns users now, and the review badge ("Bypassed" / "Under Review") reads consistently with plan detail.

* **PostgreSQL** — Multi-host failover honors Bytebase's configured TLS material on every host, not just the primary.

* The Sync Database success toast renders the actual database name instead of the literal `{{name}}` placeholder.

## 🏗️ Terraform Update

* **Terraform provider 3.18.1 required** — Marks the webhook URL as write-only and adds `APP_IM` support to `bytebase_setting`. See [Migration Guide](https://github.com/bytebase/terraform-provider-bytebase/blob/main/migration/3.18.1.md).

## ⚙️ Install and Upgrade

* [Fresh install](/get-started/self-host/deploy-with-docker)

* [Upgrade](/get-started/self-host/upgrade)

*Before upgrading: 1) Back up the [metadata](https://www.bytebase.com/docs/administration/back-up-restore-metadata/) — in-place downgrade is not supported. 2) Do not run multiple containers on the same data directory. 3) Terraform users: upgrade Bytebase server first, then apply the new Terraform config.*