{
  "name": "self-loop",
  "_description": "Single-atom query with a repeated variable across two columns: edge(x, x, _). Exercises evalAtom's equality-enforcement path; the planner emits one PlanEvalAtom node and no joins.",
  "schema": {
    "edge": {
      "columns": [
        {
          "entity": "node"
        },
        {
          "entity": "node"
        },
        {
          "entity": "edge"
        }
      ]
    }
  },
  "facts": {
    "edge": [
      [
        {
          "entity": [
            "node",
            1
          ]
        },
        {
          "entity": [
            "node",
            2
          ]
        },
        {
          "entity": [
            "edge",
            1
          ]
        }
      ],
      [
        {
          "entity": [
            "node",
            2
          ]
        },
        {
          "entity": [
            "node",
            2
          ]
        },
        {
          "entity": [
            "edge",
            2
          ]
        }
      ],
      [
        {
          "entity": [
            "node",
            3
          ]
        },
        {
          "entity": [
            "node",
            3
          ]
        },
        {
          "entity": [
            "edge",
            3
          ]
        }
      ]
    ]
  },
  "atoms": [
    {
      "table": "edge",
      "values": {
        "0": {
          "var": "x"
        },
        "1": {
          "var": "x"
        }
      }
    }
  ],
  "expected_bindings": {
    "columns": [
      "x"
    ],
    "rows": [
      [
        {
          "entity": [
            "node",
            2
          ]
        }
      ],
      [
        {
          "entity": [
            "node",
            3
          ]
        }
      ]
    ]
  }
}