feat: add connector for CouchbaseDB

[ayush33143314]

SUMMARY

Add support for couchbase db. https://www.couchbase.com/products/analytics/

TESTING INSTRUCTIONS

mannual Testing

ADDITIONAL INFORMATION

• [ ] Has associated issue:
• [ ] Required feature flags:
• [ ] Changes UI
• [ ] Includes DB Migration (follow approval process in SIP-59)
  • [ ] Migration is atomic, supports rollback & is backwards-compatible
  • [ ] Confirm DB migration upgrade and downgrade tested
  • [ ] Runtime estimates and downtime expectations provided
• [ ] Introduces new feature or API
• [ ] Removes existing feature or API

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 60.82474% with 38 lines in your changes missing coverage. Please review.

Project coverage is 70.34%. Comparing base (76d897e) to head (9c8016a). Report is 966 commits behind head on master.

Files with missing lines	Patch %	Lines
superset/db_engine_specs/couchbasedb.py	60.82%	38 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #29225      +/-   ##
==========================================
+ Coverage   60.48%   70.34%   +9.85%     
==========================================
  Files        1931     1970      +39     
  Lines       76236    78585    +2349     
  Branches     8568     8973     +405     
==========================================
+ Hits        46114    55279    +9165     
+ Misses      28017    21108    -6909     
- Partials     2105     2198      +93     

Flag	Coverage Δ
hive	49.12% <54.63%> (-0.05%)	:arrow_down:
javascript	58.05% <ø> (+0.33%)	:arrow_up:
mysql	77.00% <54.63%> (?)
postgres	77.08% <54.63%> (?)
presto	53.71% <54.63%> (-0.10%)	:arrow_down:
python	83.65% <60.82%> (+20.16%)	:arrow_up:
sqlite	76.57% <54.63%> (?)
unit	59.67% <60.82%> (+2.05%)	:arrow_up:

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[john-bodley]

Thanks @ayush33143314 for adding the engine. Would you also mind:

• Adding unit/integration tests (where necessary)
• Updating the various documentation which outlines which engines we support etc.

[rusackas]

Thank you for this! Would it also be possible to add a docs entry here?

[ayush-couchbase]

Thank you for this! Would it also be possible to add a docs entry here?

Hi , yes, I am preparing the doc, I will submit doc along with tests in next patchset. Sorry for this patch. It is still in progress.

[rusackas]

Ahh, ok, thanks! Feel free to add [WIP] to the title and/or convert it to a draft PR if you need a while to keep working on it, just so others don't assume it's ready for review like I did. Thanks again!

[ayush-couchbase]

@hughhhh @john-bodley Please review my latest patch, and guide me if I need to make any change. Thank you

[huangang]

Looking forward to this PR being merged

[rusackas]

Feel free to add the logo, too! They can appear on the website and readme.