Source code for airflow.hooks.mysql_hook

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import MySQLdb
import MySQLdb.cursors
import json
import six

from airflow.hooks.dbapi_hook import DbApiHook

[docs]class MySqlHook(DbApiHook): """ Interact with MySQL. You can specify charset in the extra field of your connection as ``{"charset": "utf8"}``. Also you can choose cursor as ``{"cursor": "SSCursor"}``. Refer to the MySQLdb.cursors for more details. """ conn_name_attr = 'mysql_conn_id' default_conn_name = 'mysql_default' supports_autocommit = True def __init__(self, *args, **kwargs): super(MySqlHook, self).__init__(*args, **kwargs) self.schema = kwargs.pop("schema", None)
[docs] def set_autocommit(self, conn, autocommit): """ MySql connection sets autocommit in a different way. """ conn.autocommit(autocommit)
[docs] def get_autocommit(self, conn): """ MySql connection gets autocommit in a different way. :param conn: connection to get autocommit setting from. :type conn: connection object. :return: connection autocommit setting :rtype bool """ return conn.get_autocommit()
[docs] def get_conn(self): """ Returns a mysql connection object """ conn = self.get_connection(self.mysql_conn_id) conn_config = { "user": conn.login, "passwd": conn.password or '', "host": or 'localhost', "db": self.schema or conn.schema or '' } if not conn.port: conn_config["port"] = 3306 else: conn_config["port"] = int(conn.port) if conn.extra_dejson.get('charset', False): conn_config["charset"] = conn.extra_dejson["charset"] if (conn_config["charset"]).lower() == 'utf8' or\ (conn_config["charset"]).lower() == 'utf-8': conn_config["use_unicode"] = True if conn.extra_dejson.get('cursor', False): if (conn.extra_dejson["cursor"]).lower() == 'sscursor': conn_config["cursorclass"] = MySQLdb.cursors.SSCursor elif (conn.extra_dejson["cursor"]).lower() == 'dictcursor': conn_config["cursorclass"] = MySQLdb.cursors.DictCursor elif (conn.extra_dejson["cursor"]).lower() == 'ssdictcursor': conn_config["cursorclass"] = MySQLdb.cursors.SSDictCursor local_infile = conn.extra_dejson.get('local_infile', False) if conn.extra_dejson.get('ssl', False): # SSL parameter for MySQL has to be a dictionary and in case # of extra/dejson we can get string if extra is passed via # URL parameters dejson_ssl = conn.extra_dejson['ssl'] if isinstance(dejson_ssl, six.string_types): dejson_ssl = json.loads(dejson_ssl) conn_config['ssl'] = dejson_ssl if conn.extra_dejson.get('unix_socket'): conn_config['unix_socket'] = conn.extra_dejson['unix_socket'] if local_infile: conn_config["local_infile"] = 1 conn = MySQLdb.connect(**conn_config) return conn
[docs] def bulk_load(self, table, tmp_file): """ Loads a tab-delimited file into a database table """ conn = self.get_conn() cur = conn.cursor() cur.execute(""" LOAD DATA LOCAL INFILE '{tmp_file}' INTO TABLE {table} """.format(**locals())) conn.commit()
[docs] def bulk_dump(self, table, tmp_file): """ Dumps a database table into a tab-delimited file """ conn = self.get_conn() cur = conn.cursor() cur.execute(""" SELECT * INTO OUTFILE '{tmp_file}' FROM {table} """.format(**locals())) conn.commit()
@staticmethod def _serialize_cell(cell, conn): """ MySQLdb converts an argument to a literal when passing those seperately to execute. Hence, this method does nothing. :param cell: The cell to insert into the table :type cell: object :param conn: The database connection :type conn: connection object :return: The same cell :rtype: object """ return cell