Expressions

Defines a language for expressions that return a value for a single row of a table. Also gives a React-based UI for editing expressions.

Complex expressions involving joins, arithmetic or case statements can be created visually and then compiled to SQL or interpreted.

See the docs for more information.

To add a new expression

1. Add tests in ExprCompilerTests
2. Add tests in testExprs
3. Add the expression in ExprUtils
4. Update ExprCompiler
5. Update ExprEvaluator
6. Make tests pass