ttanay opened a new pull request #4738: [AIRFLOW-2224] Add support CSV files in MySqlToGoogleCloudStorageOperator URL: https://github.com/apache/airflow/pull/4738 MySqlToGoogleCloudStorageOperator supported export from MySQL in newline-delimited JSON format only. Added support for export in CSV format with the option of specifying a field delimiter. Thanks to Bernardo Najlis(@bnajlis) for the original PR(#3139). I made some changes to the the original PR. Make sure you have checked _all_ steps below. ### Jira - [X] My PR addresses the following [Airflow Jira](https://issues.apache.org/jira/browse/AIRFLOW/) issues and references them in the PR title. For example, "\[AIRFLOW-XXX\] My Airflow PR" - https://issues.apache.org/jira/browse/AIRFLOW-2224 - In case you are fixing a typo in the documentation you can prepend your commit with \[AIRFLOW-XXX\], code changes always need a Jira issue. ### Description - [X] Here are some details about my PR, including screenshots of any UI changes: ### Tests - [X] My PR adds the following unit tests __OR__ does not need testing for this extremely good reason: Added tests: * test_init * test_exec_success_json * test_exec_success_csv * test_exec_success_csv_with_delimiter * test_file_splitting * test_schema_file Replaced the pre-existing test with the one @bnajlis wrote as those tests covered that case too. ### Commits - [X] My commits all reference Jira issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "[How to write a good git commit message](http://chris.beams.io/posts/git-commit/)": 1. Subject is separated from body by a blank line 1. Subject is limited to 50 characters (not including Jira issue reference) 1. Subject does not end with a period 1. Subject uses the imperative mood ("add", not "adding") 1. Body wraps at 72 characters 1. Body explains "what" and "why", not "how" ### Documentation - [X] In case of new functionality, my PR adds documentation that describes how to use it. - When adding new operators/hooks/sensors, the autoclass documentation generation needs to be added. - All the public functions and the classes in the PR contain docstrings that explain what it does ### Code Quality - [ ] Passes `flake8`
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