Coverage for airflow.operators.hive_to_mysql : 39%

import logging 

from airflow.hooks import HiveServer2Hook, MySqlHook 

from airflow.models import BaseOperator 

from airflow.utils import apply_defaults 

class HiveToMySqlTransfer(BaseOperator): 

    """ 

    Moves data from Hive to MySQL, note that for now the data is loaded 

    into memory before being pushed to MySQL, so this operator should 

    be used for smallish amount of data. 

    :param sql: SQL query to execute against the MySQL database 

    :type sql: str 

    :param mysql_table: target MySQL table, use dot notation to target a 

        specific database 

    :type mysql_table: str 

    :param mysql_conn_id: source mysql connection 

    :type mysql_conn_id: str 

    :param hiveserver2_conn_id: destination hive connection 

    :type hiveserver2_conn_id: str 

    :param mysql_preoperator: sql statement to run against mysql prior to 

        import, typically use to truncate of delete in place of the data 

        coming in, allowing the task to be idempotent (running the task 

        twice won't double load data) 

    :type mysql_preoperator: str 

    """ 

    template_fields = ('sql', 'mysql_table', 'mysql_preoperator') 

    template_ext = ('.sql',) 

    ui_color = '#a0e08c' 

    @apply_defaults 

    def __init__( 

            self, 

            sql, 

            mysql_table, 

            hiveserver2_conn_id='hiveserver2_default', 

            mysql_conn_id='mysql_default', 

            mysql_preoperator=None, 

            *args, **kwargs): 

        super(HiveToMySqlTransfer, self).__init__(*args, **kwargs) 

        self.sql = sql 

        self.mysql_table = mysql_table 

        self.mysql_conn_id = mysql_conn_id 

        self.mysql_preoperator = mysql_preoperator 

        self.hiveserver2_conn_id = hiveserver2_conn_id 

    def execute(self, context): 

        hive = HiveServer2Hook(hiveserver2_conn_id=self.hiveserver2_conn_id) 

        logging.info("Extracting data from Hive") 

        logging.info(self.sql) 

        results = hive.get_records(self.sql) 

        mysql = MySqlHook(mysql_conn_id=self.mysql_conn_id) 

        if self.mysql_preoperator: 

            logging.info("Running MySQL preoperator") 

            logging.info(self.mysql_preoperator) 

            mysql.run(self.mysql_preoperator) 

        logging.info("Inserting rows into MySQL") 

        mysql.insert_rows(table=self.mysql_table, rows=results)