feat(explore): Druid data type conversion

[nikolagigic]

SUMMARY

Data type conversion for Apache Druid engine spec. This is an addition to the base implementation of data type conversion project.
#13294

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TEST PLAN

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

[codecov]

Codecov Report

Merging #13595 (6561fdf) into master (609c359) will decrease coverage by 0.12%.
The diff coverage is 74.67%.

❗ Current head 6561fdf differs from pull request most recent head 2bf41c9. Consider uploading reports for the commit 2bf41c9 to get more accurate results

@@            Coverage Diff             @@
##           master   #13595      +/-   ##
==========================================
- Coverage   77.29%   77.16%   -0.13%     
==========================================
  Files         910      933      +23     
  Lines       46359    47386    +1027     
  Branches     5633     5928     +295     
==========================================
+ Hits        35831    36566     +735     
- Misses      10392    10672     +280     
- Partials      136      148      +12     

Flag	Coverage Δ
cypress	56.23% <44.68%> (-0.50%)	⬇️
hive	80.26% <91.64%> (+0.19%)	⬆️
mysql	80.56% <91.86%> (+0.19%)	⬆️
postgres	80.60% <91.86%> (+0.17%)	⬆️
presto	?
python	80.98% <91.86%> (+0.04%)	⬆️
sqlite	80.15% <88.22%> (+0.11%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...et-frontend/src/SqlLab/components/TableElement.jsx	88.37% <ø> (ø)
superset-frontend/src/chart/chartReducer.ts	48.59% <ø> (-15.79%)	⬇️
...ontend/src/common/hooks/usePrevious/usePrevious.ts	100.00% <ø> (ø)
...ontend/src/components/CertifiedIconWithTooltip.tsx	54.54% <0.00%> (-5.46%)	⬇️
...rset-frontend/src/components/ErrorMessage/types.ts	100.00% <ø> (ø)
...nd/src/components/SupersetResourceSelect/index.tsx	90.32% <ø> (ø)
...et-frontend/src/dashboard/actions/nativeFilters.ts	60.00% <ø> (-4.11%)	⬇️
...end/src/dashboard/components/StickyVerticalBar.tsx	100.00% <ø> (ø)
...end/src/dashboard/components/dnd/DragDroppable.jsx	97.29% <ø> (ø)
...c/dashboard/components/gridComponents/Markdown.jsx	90.90% <ø> (+0.52%)	⬆️
... and 217 more

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[villebro]

It's actually the column name that is __type, not the type. So this needs to be picked up in get_column_spec, probably by adding the column name to the signature.

[villebro]

What is the purpose of this assertion? Also, the type of the type field on BaseColumn and the child class TableColumn is String(32), i.e. should not be passed a sqla column type.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions. For admin, please label this issue .pinned to prevent stale bot from closing the issue.

[villebro]

Closing this as new work in this area has made this PR redundant.