kaxil commented on a change in pull request #6578: [AIRFLOW-5907] Add S3 to MySql Operator URL: https://github.com/apache/airflow/pull/6578#discussion_r398034873
########## File path: airflow/providers/mysql/operators/s3_to_mysql.py ########## @@ -0,0 +1,84 @@ +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. + +import os +from typing import Optional + +from airflow.models import BaseOperator +from airflow.providers.amazon.aws.hooks.s3 import S3Hook +from airflow.providers.mysql.hooks.mysql import MySqlHook +from airflow.utils.decorators import apply_defaults + + +class S3ToMySqlTransfer(BaseOperator): + """ + Loads a file from S3 into a MySQL table. + + :param s3_source_key: The path to the file (S3 key) that will be loaded into MySQL. + :type s3_source_key: str + :param mysql_table: The MySQL table into where the data will be sent. + :type mysql_table: str + :param mysql_extra_options: MySQL options to specify exactly how to load the data. + :type mysql_extra_options: Optional[str] + :param aws_conn_id: The S3 connection that contains the credentials to the S3 Bucket. + :type aws_conn_id: str + :param mysql_conn_id: The MySQL connection that contains the credentials to the MySQL data base. + :type mysql_conn_id: str + """ + + template_fields = ('s3_source_key', 'mysql_table',) + template_ext = () + ui_color = '#f4a460' + + @apply_defaults + def __init__(self, + s3_source_key: str, + mysql_table: str, + *args, + mysql_extra_options: Optional[str] = None, + aws_conn_id: str = 'aws_default', + mysql_conn_id: str = 'mysql_default', + **kwargs) -> None: + super(S3ToMySqlTransfer, self).__init__(*args, **kwargs) + self.s3_source_key = s3_source_key + self.mysql_table = mysql_table + self.mysql_extra_options = mysql_extra_options or '' + self.aws_conn_id = aws_conn_id + self.mysql_conn_id = mysql_conn_id + + def execute(self, context: dict) -> None: + """ + Executes the transfer operation from S3 to MySQL. + + :param context: The context that is being provided when executing. + :type context: dict + """ + self.log.info('Loading %s to MySql table %s...', self.s3_source_key, self.mysql_table) + + s3_hook = S3Hook(aws_conn_id=self.aws_conn_id) + file = s3_hook.download_file(key=self.s3_source_key) + + try: + mysql = MySqlHook(mysql_conn_id=self.mysql_conn_id) + mysql.bulk_load_custom( + table=self.mysql_table, + tmp_file=file, + extra_options=self.mysql_extra_options + ) + finally: + # Remove file downloaded from s3 to be idempotent. + os.remove(file) Review comment: Makes sense, got it. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
