[AIRFLOW-3189] Remove schema from get_uri response if None

[zuku1985]

"None" was appended to URI if schema=None. A check was added if
schema is None.

Make sure you have checked all steps below.

Jira

• My PR addresses the following Airflow Jira issues and references them in the PR title. For example, "[AIRFLOW-XXX] My Airflow PR"
  • https://issues.apache.org/jira/browse/AIRFLOW-3189
  • 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.
  • In case you are proposing a fundamental code change, you need to create an Airflow Improvement Proposal (AIP).
  • In case you are adding a dependency, check if the license complies with the ASF 3rd Party License Policy.

Description

In DbApiHook method get_uri "None" was appended to uri when schema was not set. This PR adds check if schema is None.

• Here are some details about my PR, including screenshots of any UI changes:

Tests

• My PR adds the following unit tests OR does not need testing for this extremely good reason:
  test_get_uri_schema_not_none and test_get_uri_schema_none in TestDbApiHook

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.
  • All the public functions and the classes in the PR contain docstrings that explain what it does
  • If you implement backwards incompatible changes, please leave a note in the Updating.md so we can assign it to a appropriate release

[potiuk]

Nice one !

[codecov-io]

Codecov Report

Merging #6833 into master will decrease coverage by 0.29%.
The diff coverage is 100%.

@@           Coverage Diff            @@
##           master   #6833     +/-   ##
========================================
- Coverage   84.59%   84.3%   -0.3%     
========================================
  Files         676     676             
  Lines       38337   38361     +24     
========================================
- Hits        32433   32342     -91     
- Misses       5904    6019    +115

Impacted Files	Coverage Δ
airflow/hooks/dbapi_hook.py	91.73% <100%> (+0.21%)	⬆️
airflow/kubernetes/volume_mount.py	44.44% <0%> (-55.56%)	⬇️
airflow/kubernetes/volume.py	52.94% <0%> (-47.06%)	⬇️
airflow/kubernetes/pod_launcher.py	45.25% <0%> (-46.72%)	⬇️
...rflow/contrib/operators/kubernetes_pod_operator.py	73.73% <0%> (-24.99%)	⬇️
airflow/kubernetes/refresh_config.py	50.98% <0%> (-23.53%)	⬇️
airflow/utils/dag_processing.py	87.8% <0%> (+0.19%)	⬆️
airflow/jobs/backfill_job.py	91.59% <0%> (+0.86%)	⬆️

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[potiuk]

Nice one ! Thanks @zuku1985 !

[potiuk]

Also cherry-picked to 1.10.7