Benchmark BCP under default (FULL) recovery; report active recovery model

Drop the ALTER DATABASE SET RECOVERY SIMPLE so BCP is measured under full
logging, and print the active recovery model for interpretability.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: rad-pat

tests/sqlserver_test.py

@@ -1489,17 +1489,19 @@ def test_performance(cursor: pyodbc.Cursor):
     N_BULK = 100_000
     BATCH = 20_000
 
-    # AUTOCOMMIT so BCP commits as it goes and ALTER DATABASE can run.
+    # AUTOCOMMIT so BCP commits as it goes.
     cursor.connection.autocommit = True
 
-    # Minimal logging requires a non-FULL recovery model. Best-effort: ignore
-    # failures (e.g. insufficient permissions) so the benchmark still runs.
+    # NOTE: recovery model left at the database default (FULL on a fresh DB) to
+    # measure BCP under full logging. Report the active recovery model so the
+    # numbers are interpretable.
     try:
-        dbname = cursor.execute("SELECT DB_NAME()").fetchval()
-        cursor.execute(f"ALTER DATABASE [{dbname}] SET RECOVERY SIMPLE")
-        print(f"recovery model set to SIMPLE for [{dbname}]")
+        rm = cursor.execute(
+            "SELECT recovery_model_desc FROM sys.databases WHERE database_id = DB_ID()"
+        ).fetchval()
+        print(f"recovery model: {rm}")
     except pyodbc.Error as e:
-        print(f"could not set SIMPLE recovery (continuing): {e}")
+        print(f"could not read recovery model (continuing): {e}")
 
     cursor.execute("DROP TABLE IF EXISTS test_perf")
     cursor.execute("""