[AIRFLOW-3490] BigQueryHook's Ability to Patch Table/View

[ryanyuan]

Add patch_table() to BQHook, and its unit tests

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Jira

• My PR addresses the following Airflow-3490 issues and references them in the PR title.

Description

• Here are some details about my PR, including screenshots of any UI changes:
  Add patch_table() to BigQueryBaseCursor in BigQueryHook so that it has ability to patch tables and patch views.

Tests

• My PR adds the following unit tests OR does not need testing for this extremely good reason:
  tests.contrib.hooks.test_bigquery_hook:TestBigQueryBaseCursor.test_patch_table
  tests.contrib.hooks.test_bigquery_hook:TestBigQueryBaseCursor.test_patch_view

Commits

• 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":
  1. Subject is separated from body by a blank line
  2. Subject is limited to 50 characters (not including Jira issue reference)
  3. Subject does not end with a period
  4. Subject uses the imperative mood ("add", not "adding")
  5. Body wraps at 72 characters
  6. Body explains "what" and "why", not "how"

Documentation

• 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

[ryanyuan]

Hi @kaxil, could you please review this?
The Travis just threw some random errors. First time it failed in python2 docker with sqlite. The second time it failed in python3 k8s with postgres.

[codecov-io]

Codecov Report

Merging #4299 into master will decrease coverage by 3.83%.
The diff coverage is 88.88%.

@@            Coverage Diff             @@
##           master    #4299      +/-   ##
==========================================
- Coverage   78.59%   74.76%   -3.84%     
==========================================
  Files         204      428     +224     
  Lines       16453    29638   +13185     
==========================================
+ Hits        12932    22159    +9227     
- Misses       3521     7479    +3958

Impacted Files	Coverage Δ
airflow/contrib/hooks/bigquery_hook.py	57.5% <88.88%> (ø)
airflow/www/blueprints.py	92.85% <0%> (-7.15%)	⬇️
airflow/operators/dagrun_operator.py	94.73% <0%> (-1.42%)	⬇️
airflow/utils/cli_action_loggers.py	73.33% <0%> (-0.87%)	⬇️
airflow/bin/cli.py	64.76% <0%> (-0.27%)	⬇️
airflow/www_rbac/utils.py	73.95% <0%> (-0.14%)	⬇️
airflow/api/common/experimental/mark_tasks.py	97.6% <0%> (-0.06%)	⬇️
airflow/models/__init__.py	92.54% <0%> (-0.06%)	⬇️
airflow/www_rbac/app.py	97.05% <0%> (-0.03%)	⬇️
airflow/www/app.py	98.95% <0%> (-0.02%)	⬇️
... and 246 more

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[kaxil]

This needs to support more than just updating schema as done by the api https://cloud.google.com/bigquery/docs/reference/rest/v2/tables/patch.

[ryanyuan]

@kaxil Updated. Please review.

[kaxil]

Suggested change

	:param dataset_id: The dataset containing the tableto be patched.
	:param dataset_id: The dataset containing the table to be patched.

[ryanyuan]

@kaxil Changed.

[kaxil]

I have updated this as project_id can be None as we take that info from the connection.

Can you update the tests accordingly.

[kaxil]

Thanks @ryanyuan

[ryanyuan]

Thanks @ryanyuan

Thank you @kaxil