message: remove fetchall() on non-select execute() calls
diff: @@ -55,11 +55,11 @@ def duckdb_cursor(request):
  connection = duckdb.connect('')
  cursor = connection.cursor()
  - cursor.execute('CREATE TABLE integers (i integer)').fetchall()
  - cursor.execute('INSERT INTO integers VALUES (0),(1),(2),(3),(4),(5),(6),(7),(8),(9),(NULL)').fetchall()
  - cursor.execute('CREATE TABLE timestamps (t timestamp)').fetchall()
  - cursor.execute("INSERT INTO timestamps VALUES ('1992-10-03 18:34:45'), ('2010-01-01 00:00:01'), (NULL)").fetchall()
  - cursor.execute("CALL dbgen(sf=0.01)").fetchall()
  + cursor.execute('CREATE TABLE integers (i integer)')
  + cursor.execute('INSERT INTO integers VALUES (0),(1),(2),(3),(4),(5),(6),(7),(8),(9),(NULL)')
  + cursor.execute('CREATE TABLE timestamps (t timestamp)')
  + cursor.execute("INSERT INTO timestamps VALUES ('1992-10-03 18:34:45'), ('2010-01-01 00:00:01'), (NULL)")
  + cursor.execute("CALL dbgen(sf=0.01)")
  return cursor
  