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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# MySQL Connector/Python - MySQL driver written in Python.
# Copyright (c) 2009, 2013, Oracle and/or its affiliates. All rights reserved.
# MySQL Connector/Python is licensed under the terms of the GPLv2
# <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
# MySQL Connectors. There are special exceptions to the terms and
# conditions of the GPLv2 as it is applied to this software, see the
# FOSS License Exception
# <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
from datetime import time
import mysql.connector
"""
Example using MySQL Connector/Python showing:
* How to save timestamps including microseconds
* Check the MySQL server version
NOTE: This only works with MySQL 5.6.4 or greater. This example will work
with earlier versions, but the microseconds information will be lost.
Story: We keep track of swimmers in a freestyle 4x 100m relay swimming event
with millisecond precision.
"""
CREATE_TABLE = """
CREATE TABLE relay_laps (
teamid TINYINT UNSIGNED NOT NULL,
swimmer TINYINT UNSIGNED NOT NULL,
lap TIME(3),
PRIMARY KEY (teamid, swimmer)
) ENGINE=InnoDB
"""
def main(config):
output = []
cnx = mysql.connector.Connect(**config)
if cnx.get_server_version() < (5,6,4):
output.append(
"MySQL {} does not support fractional precision"\
" for timestamps.".format(cnx.get_server_info()))
return output
cursor = cnx.cursor()
try:
cursor.execute("DROP TABLE IF EXISTS relay_laps")
except:
# Ignoring the fact that it was not there
pass
cursor.execute(CREATE_TABLE)
teams = {}
teams[1] = [
(1, time(second=47, microsecond=510000)),
(2, time(second=47, microsecond=20000)),
(3, time(second=47, microsecond=650000)),
(4, time(second=46, microsecond=60000)),
]
insert = "INSERT INTO relay_laps (teamid,swimmer,lap) VALUES (%s,%s,%s)"
for team, swimmers in teams.items():
for swimmer in swimmers:
cursor.execute(insert, (team, swimmer[0], swimmer[1]))
cnx.commit()
cursor.execute("SELECT * FROM relay_laps")
for row in cursor:
output.append("{: 2d} | {: 2d} | {}".format(*row))
try:
cursor.execute("DROP TABLE IF EXISTS relay_laps")
except:
# Ignoring the fact that it was not there
pass
cursor.close()
cnx.close()
return output
if __name__ == '__main__':
#
# Configure MySQL login and database to use in config.py
#
from config import Config
config = Config.dbinfo().copy()
out = main(config)
print('\n'.join(out))
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