3.0.0 : Reconstructed Database System.

tools/inspect_sqlite_schema.py

@@ -0,0 +1,63 @@
+import sqlite3
+from pathlib import Path
+
+
+def _connect(db_path: Path) -> sqlite3.Connection:
+    conn = sqlite3.connect(str(db_path))
+    conn.row_factory = sqlite3.Row
+    return conn
+
+
+def _list_tables(conn: sqlite3.Connection) -> list[str]:
+    cur = conn.execute(
+        "SELECT name FROM sqlite_master WHERE type='table' AND name NOT LIKE 'sqlite_%' ORDER BY name"
+    )
+    return [r["name"] for r in cur.fetchall()]
+
+
+def _table_columns(conn: sqlite3.Connection, table: str) -> list[tuple[int, str, str, int, str, int]]:
+    cur = conn.execute(f"PRAGMA table_info({table})")
+    rows = cur.fetchall()
+    return [(r[0], r[1], r[2], r[3], r[4], r[5]) for r in rows]
+
+
+def inspect(db_path: Path, tables: list[str] | None = None) -> None:
+    print(f"\n=== {db_path} ===")
+    if not db_path.exists():
+        print("NOT FOUND")
+        return
+    conn = _connect(db_path)
+    try:
+        all_tables = _list_tables(conn)
+        print(f"tables={len(all_tables)}")
+        if tables is None:
+            tables = all_tables
+        for t in tables:
+            if t not in all_tables:
+                print(f"\n-- {t} (missing)")
+                continue
+            cols = _table_columns(conn, t)
+            print(f"\n-- {t} cols={len(cols)}")
+            for cid, name, ctype, notnull, dflt, pk in cols:
+                print(f"{cid:>3}  {name:<40} {ctype:<12} notnull={notnull} pk={pk} dflt={dflt}")
+    finally:
+        conn.close()
+
+
+if __name__ == "__main__":
+    base_dir = Path(__file__).resolve().parents[1]
+    l2 = base_dir / "database" / "L2" / "L2.db"
+    l3 = base_dir / "database" / "L3" / "L3.db"
+    web = base_dir / "database" / "Web" / "Web_App.sqlite"
+
+    inspect(
+        l3,
+        tables=[
+            "dm_player_features",
+            "dm_player_match_history",
+            "dm_player_map_stats",
+            "dm_player_weapon_stats",
+        ],
+    )
+    inspect(web)
+    inspect(l2, tables=["dim_players", "fact_matches", "fact_match_players", "fact_match_rounds"])