feat: add option to load big/wide tables

[betodealmeida]

SUMMARY

This PR adds a new CLI option to load big/wide tables into Superset. The goal is to create tables with synthetic data that help developers test new features and DB migrations in realistic scenarios.

This first PR just adds a function called add_data that generates the data given a schema. When running superset load-examples -b it will also create a wide table with 100 columns, to help test SQL Lab (which behaves differently if the table has more than 50 columns).

The next steps include adding more tables, as well as implementing functionality to add more rows to the Superset models, to help benchmark DB migrations.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

N/A

TEST PLAN

Ran superset load-examples -b -t and verified that the table wide_table was created, with 1000 rows and 100 columns.

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 #13448 (37f76e1) into master (974f447) will decrease coverage by 5.80%.
The diff coverage is 41.85%.

@@            Coverage Diff             @@
##           master   #13448      +/-   ##
==========================================
- Coverage   77.14%   71.34%   -5.81%     
==========================================
  Files         865      825      -40     
  Lines       44961    41180    -3781     
  Branches     5415     4260    -1155     
==========================================
- Hits        34686    29378    -5308     
- Misses      10152    11802    +1650     
+ Partials      123        0     -123     

Flag	Coverage Δ
cypress	57.17% <41.85%> (-1.38%)	⬇️
hive	79.96% <ø> (?)
javascript	?
mysql	80.29% <ø> (?)
postgres	80.33% <ø> (?)
presto	79.99% <ø> (?)
python	80.82% <ø> (+0.01%)	⬆️
sqlite	79.95% <ø> (?)

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

Impacted Files	Coverage Δ
...erset-frontend/src/SqlLab/components/SouthPane.jsx	64.10% <ø> (-17.95%)	⬇️
...et-frontend/src/SqlLab/components/TableElement.jsx	5.88% <0.00%> (-80.64%)	⬇️
...end/src/SqlLab/components/TemplateParamsEditor.jsx	23.80% <ø> (ø)
...et-frontend/src/SqlLab/reducers/getInitialState.js	50.00% <ø> (ø)
superset-frontend/src/SqlLab/reducers/sqlLab.js	17.47% <0.00%> (-23.10%)	⬇️
...src/SqlLab/utils/reduxStateToLocalStorageHelper.js	61.53% <ø> (-38.47%)	⬇️
superset-frontend/src/chart/ChartContainer.jsx	100.00% <ø> (ø)
...-frontend/src/common/components/Collapse/index.tsx	94.73% <ø> (ø)
...ontend/src/common/components/InfoTooltip/index.tsx	33.33% <ø> (ø)
...set-frontend/src/common/components/Modal/Modal.tsx	100.00% <ø> (ø)
... and 650 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 974f447...e3aba40. Read the comment docs.

[eschutho]

this is a bit of a nit, but for consistency, do you think it's better to have default False values on all of these or allow nulls?

[betodealmeida]

In this case click is adding the default values when parsing the CLI options, but I'll add some default values to the function signature as well.

[eschutho]

This is awesome!