Computed Fields — ASL

Computed fields

Computed fields are not stored as columns. They are expanded inline during AQL compilation.

type User {
  required email: str;
  name: str;
  computed display_name := .name ?? .email;
}

type OrderItem {
  required quantity: int32;
  required unit_price: decimal;
  discount: decimal;
  computed total := (.quantity * .unit_price) - .discount;
  computed tax := .unit_price * 0.2;
}

Computed fields support arithmetic operators (+, -, *, /), unary signs (+, -), function calls, and ?? (null coalescing). They can be selected in AQL shapes and queried just like ordinary fields.