Support timeFormat extraction function for Druid as filter field

[dinsaw]

CATEGORY

Choose one

• Bug Fix
• Enhancement (new features, refinement)
• Refactor
• Add tests
• Build / Development Environment
• Documentation

SUMMARY

The timeFormat extraction function works as group by field but does not work as filter field.

{
  "type": "extraction",
  "dimension": "__time",
  "outputName": "dayOfMonth",
  "extractionFn":{
    "type" : "timeFormat",
    "format" : "d",
    "timeZone" : "Asia/Kolkata",
    "locale" : "en"
  }
}

If we use this custom column as filter field, Superset gives Unsupported extraction function: timeFormat error.

FIX:

I have used existing TimeFormatExtraction from pydruid to support this.

TEST PLAN

• Create custom druid column as mentioned above.
• Use the column as filter in any chart. We have checked this for Line Chart and Big number with Trendline Chart

ADDITIONAL INFORMATION

• Has associated issue:
• Changes UI
• Requires DB Migration.
• Confirm DB Migration upgrade and downgrade tested.
• Introduces new feature or API
• Removes existing feature or API

REVIEWERS

[codecov-io]

Codecov Report

Merging #8728 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #8728      +/-   ##
==========================================
+ Coverage   65.57%   65.57%   +<.01%     
==========================================
  Files         482      482              
  Lines       24083    24085       +2     
  Branches     2763     2763              
==========================================
+ Hits        15792    15794       +2     
  Misses       8111     8111              
  Partials      180      180

Impacted Files	Coverage Δ
superset/connectors/druid/models.py	82.35% <100%> (+0.04%)	⬆️

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