Reference

11.1 Databases#

Database	Notes
PostgreSQL	Everything in this guide, including enum types, extensions, materialized views and plans
MySQL, MariaDB	Schemas are databases; users and roles with the server’s own flags
SQL Server	Schemas, procedures, table-valued functions, users and roles
BigQuery	A dry run tells how many bytes a statement would process before it runs; access is managed in Google Cloud
SQLite	A file in the workspace; nothing to install
MongoDB	Collections as tables; find and aggregate pipelines in the editor

11.2 This guide in Tabellum#

The same guide is inside the app, screenshots and marks included, and needs no network: tap User guide in the command palette (the search button in the title bar), or the User guide button in Help (the ? at the bottom of the menu). The chapter list switches to the desktop guide. On the website it is at tabellum.dudko.dev/manual, a page per chapter, with this PDF.

11.3 On a phone#

The phone app is the same Tabellum as on a computer, with these differences:

The workspace is inside the app, not a folder you choose.
Backups go through the database connection, not tools such as pg_dump.
There is no SSH agent; paste private keys into the tunnel instead.
Sync goes through the GitHub, GitLab or Bitbucket API.
There is no MCP server for external AI tools.
Updates come from the App Store or Google Play.

The engine that talks to the databases runs inside the app. Engine in the command palette can point the app at a Tabellum worker you host instead, for databases only that machine can reach.

11.4 If something goes wrong#

A connection fails. The message under it says what failed and what to check. “Connection refused” means nothing listens on that host and port; a timeout usually means a firewall or a VPN — or a server that only your office network can reach.
A query takes too long. Tap the red Stop button.
The agent does not answer. Check its API key and model in the agent’s settings; What was sent in the agent’s page shows each request.
A design wants to undo someone else’s change. Use Reload from the database (see Section 7).

Support: tabellum.dudko.dev/support.