{
  "node_id": "pg-eeb777ca54434480a06bfe7fc5e7d3ca",
  "keywords": [
    "索引",
    " 约束",
    "constraints",
    "index"
  ],
  "children": [],
  "export": [
    "primary_key.json",
    "unique.json",
    "unique_2.json"
  ],
  "keywords_must": [
    "索引",
    " 约束",
    "constraints",
    "index"
  ],
  "keywords_forbid": []
}