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"""把第二轮 DeepSeek 出的 6 个大库和 2025 道题并进来(cn-sqlite-round2.zip,照 deepseek_tasks.md 做的)。

    python scripts/import_round2.py --src <解压出来的 cn-sqlite-full 目录>

zip 是在旧版项目上做的,只取两样:schemas/hard2/*.sql 和 data/hard2_train.jsonl。
- property_mgmt、car_service 的主键是复数(communities_id),引用它的外键却是单数(community_id),
  car_service 里还同时有 lead_technician_id 和 lead_technicians_id。统一改成单数,建表语句和 SQL 一起改
- 改名前后结果必须一模一样:同一份数据建两个库,一个 ALTER TABLE RENAME COLUMN,老 SQL 跑老库、新 SQL 跑新库,逐条比
- 题目写到 data/round2/raw/<库名>.jsonl(db / question / sql / difficulty / type),还没筛,
  不进训练;check_round2.py 筛完才写到 data/new/
"""

import argparse
import json
import re
import sqlite3
from collections import Counter
from pathlib import Path

ROOT = Path(__file__).resolve().parent.parent

RENAME = {
    "property_mgmt": {
        "communities_id": "community_id", "buildings_id": "building_id", "units_id": "unit_id",
        "houses_id": "house_id", "owners_id": "owner_id", "owner_house_relations_id": "owner_house_relation_id",
        "tenants_id": "tenant_id", "lease_contracts_id": "lease_contract_id", "fee_bills_id": "fee_bill_id",
        "payments_id": "payment_id", "repair_orders_id": "repair_order_id", "repair_workers_id": "repair_worker_id",
        "repair_assignments_id": "repair_assignment_id",
    },
    "car_service": {
        "stores_id": "store_id", "vehicle_models_id": "vehicle_model_id", "owners_id": "owner_id",
        "vehicles_id": "vehicle_id", "sales_orders_id": "sales_order_id", "technicians_id": "technician_id",
        "repair_orders_id": "repair_order_id", "repair_items_id": "repair_item_id", "parts_id": "part_id",
        "part_issues_id": "part_issue_id", "insurance_claims_id": "insurance_claim_id",
        "technician_assignments_id": "technician_assignment_id", "lead_technicians_id": "lead_technician_id",
    },
}
LABEL = {"中等": "中", "每组前 N/并列": "每组前N/并列", "反连接": "反连接/存在性"}


def rename(text: str, mapping: dict[str, str]) -> str:
    for old, new in mapping.items():
        text = re.sub(rf"\b{old}\b", new, text)
    return text


def rows_of(conn: sqlite3.Connection, sql: str):
    return conn.execute(sql).fetchall()


def main() -> None:
    ap = argparse.ArgumentParser()
    ap.add_argument("--src", required=True, help="cn-sqlite-round2.zip 解压出来的 cn-sqlite-full 目录")
    args = ap.parse_args()
    src = Path(args.src)

    out_schema = ROOT / "schemas" / "hard2"
    out_schema.mkdir(parents=True, exist_ok=True)
    old_db, new_db = {}, {}
    for f in sorted((src / "schemas" / "hard2").glob("*.sql")):
        db, ddl = f.stem, f.read_text(encoding="utf-8")
        mapping = RENAME.get(db, {})
        (out_schema / f.name).write_text(rename(ddl, mapping), encoding="utf-8")
        seed = (src / "seeds" / "hard2" / f.name).read_text(encoding="utf-8")
        old_db[db] = sqlite3.connect(":memory:")
        old_db[db].executescript(ddl + seed)
        new_db[db] = sqlite3.connect(":memory:")
        new_db[db].executescript(ddl + seed)
        for t, in new_db[db].execute("select name from sqlite_master where type='table'").fetchall():
            for col in [c[1] for c in new_db[db].execute(f'pragma table_info("{t}")')]:
                if col in mapping:
                    new_db[db].execute(f'ALTER TABLE "{t}" RENAME COLUMN "{col}" TO "{mapping[col]}"')
        # 改完的建表语句和 ALTER 出来的库得是同一个结构,不然下面的比对没意义
        want = sqlite3.connect(":memory:")
        want.executescript(rename(ddl, mapping))
        shape = lambda c: sorted((t, tuple(x[1] for x in c.execute(f'pragma table_info("{t}")')))
                                 for t, in c.execute("select name from sqlite_master where type='table'"))
        assert shape(want) == shape(new_db[db]), db

    items, mismatch, broken = [], 0, 0
    for line in (src / "data" / "hard2_train.jsonl").read_text(encoding="utf-8").splitlines():
        r = json.loads(line)
        db = r["db"]
        user, sql = r["messages"][1]["content"], r["messages"][2]["content"].strip()
        question = user.rsplit("\n\n问题:", 1)[1].strip()
        new_sql = rename(sql, RENAME.get(db, {}))
        try:
            same = rows_of(old_db[db], sql) == rows_of(new_db[db], new_sql)
        except sqlite3.Error as exc:
            print("跑不通:", db, exc, new_sql[:80])
            broken += 1
            continue
        if not same:
            print("改名后结果变了:", db, question)
            mismatch += 1
            continue
        items.append({"db": db, "question": question, "sql": new_sql,
                      "difficulty": LABEL.get(r.get("difficulty"), r.get("difficulty")),
                      "type": LABEL.get(r.get("type"), r.get("type"))})

    by_db = Counter(it["db"] for it in items)
    (ROOT / "data" / "round2" / "raw").mkdir(parents=True, exist_ok=True)
    for db in by_db:
        out = ROOT / "data" / "round2" / "raw" / f"{db}.jsonl"
        out.write_text("".join(json.dumps(it, ensure_ascii=False) + "\n" for it in items if it["db"] == db),
                       encoding="utf-8")
    print(f"导入 {len(items)} 条(跑不通 {broken},改名后结果变了 {mismatch})", dict(by_db))


if __name__ == "__main__":
    main()