A Visual Studio Code extension that parses Business Central AL source files and compiled .app symbol packages to render an interactive ER-style diagram of table relationships.
Features
ER diagram — entity boxes with field names and data types, crow's foot notation on relation edges
Depth/focus mode — double-click any table to expand its neighbourhood; use the depth slider to control how many hops to show
Filter by name — type in the search box to immediately narrow the diagram to matching tables
Open source — click a table node to jump to its .al declaration
Base-app coverage — reads compiled .app symbol packages so relations to standard BC tables resolve correctly
Live refresh — diagram updates automatically when .al files change
Commands
Command
Description
AL Table Viz: Show All Table Relations
Opens the diagram with all tables in the workspace
AL Table Viz: Show Relations for Current Table
Opens the diagram focused on the table in the active editor (also available via right-click on .al files)
Configuration
Setting
Default
Description
alTableViz.defaultDepth
2
Number of relation hops to show in focus mode
alTableViz.showExternalTables
true
Include tables from .app symbol packages
Requirements
VS Code 1.85+
An AL workspace with .al source files (AL Language extension recommended)
Development
npm install
npm run compile # single build
npm run watch # rebuild on change
Press F5 in VS Code to launch the Extension Development Host.
