CXN Execution Engine

general CXN execution engine

Get Started

const { execute } = require("cxn-engine")
const cds = require("@sap/cds-compiler");
const compileCXN = cds.parse.expr;

const ctx = {
  a: ["1", "2", 3, 4],
  b: [{ c: 1 }, { c: 2, name: "a name" }, { c: 3 }],
  c: { d: [{ e: { f: { value: 1 } } }] }
};

expect(execute(compileCXN("a"), ctx)).toBe(ctx.a);
expect(execute(compileCXN("a[0]"), ctx)).toBe(ctx.a[0]);
expect(execute(compileCXN("a[2]"), ctx)).toBe(ctx.a[2]);
expect(execute(compileCXN("b[c=2]"), ctx)).toStrictEqual([ctx.b[1]]);
expect(execute(compileCXN("first(b[c=2])"), ctx)).toBe(ctx.b[1]);
expect(execute(compileCXN("b[c=2].name"), ctx)).toBe(ctx.b[1].name);
expect(execute(compileCXN("c.d[0].e.f.value"), ctx)).toBe(ctx.c.d[0].e.f.value);

Operators

• [x] Logic
  • [ ] Deep Equal
• [x] Numeric
  • [x] Numeric Common Order (* and / should be calculated firstly)
• [x] Compare
• [x] Like/Between
• [x] NOT
• [x] IN
• [x] IS
• [x] EXISTS

Reference Evaluation

• [x] Chain
• [x] Deep
• [ ] Where

Built-in Functions

• [x] first
• [x] last
• [x] sum
• [x] avg
• [x] min
• [x] max
• [ ] assign
• [x] append (covered by Array.prototype.concat)
• [ ] groupBy
• [x] uuid
• [x] nanoid
• [x] Array.prototype.*
• [x] Date.prototype.*
• [x] Number.prototype.*
• [x] String.prototype.*

Param Binding

• [ ] param binding

Security

• [ ] disable prototype access
• [ ] execution timeout

CHANGELOG

LICENSE