Reduce the number of Spark jobs.

[ueshin]

Addressing #1159 (comment).

[ueshin]

cc @HyukjinKwon @itholic

[softagram-bot]

Softagram Impact Report for pull/1174 (head commit: b4da219)

⭐ Change Overview

(Open in Softagram Desktop for full details)

📄 Full report

• Permalink: Full report for pull/1174

Impact Report explained. Give feedback on this report to [email protected]

[codecov-io]

Codecov Report

Merging #1174 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1174      +/-   ##
==========================================
+ Coverage   95.28%   95.28%   +<.01%     
==========================================
  Files          35       35              
  Lines        7084     7089       +5     
==========================================
+ Hits         6750     6755       +5     
  Misses        334      334

Impacted Files	Coverage Δ
databricks/koalas/base.py	96.39% <100%> (+0.04%)	⬆️
databricks/koalas/indexing.py	96.01% <100%> (+0.02%)	⬆️

---

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 c8c2214...b4da219. Read the comment docs.