{
  "name": "cartesian",
  "_description": "Two disjoint atoms over different tables. Exercises the 'stray' branch of planConjunction's spanning forest (no shared variables = no edge in the intersection graph) and the linear chain of natural-joins that fullJoinForest emits over disconnected components.",
  "schema": {
    "left": { "columns": [{"entity": "left"}] },
    "right": { "columns": [{"entity": "right"}] }
  },
  "facts": {
    "left": [
      [{"entity": ["left", 1]}],
      [{"entity": ["left", 2]}]
    ],
    "right": [
      [{"entity": ["right", 10]}],
      [{"entity": ["right", 20]}]
    ]
  },
  "atoms": [
    {"table": "left", "values": {"0": {"var": "a"}}},
    {"table": "right", "values": {"0": {"var": "b"}}}
  ],
  "expected_bindings": {
    "columns": ["a", "b"],
    "rows": [
      [{"entity": ["left", 1]}, {"entity": ["right", 10]}],
      [{"entity": ["left", 1]}, {"entity": ["right", 20]}],
      [{"entity": ["left", 2]}, {"entity": ["right", 10]}],
      [{"entity": ["left", 2]}, {"entity": ["right", 20]}]
    ]
  }
}