Updates pivot on rebase and join tests

[rchowell]

Updates pivot on rebase and join tests

• Do your changes comply with the Contributing Guidelines
  and Code Style Guidelines? [YES/NO]
  Yes

License Information

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[github-actions]

Conformance comparison report

	Base (35377df)	b199e87	+/-
% Passing	92.54%	92.54%	0.00%
✅ Passing	5384	5384	0
❌ Failing	434	434	0
🔶 Ignored	0	0	0
Total Tests	5818	5818	0

Number passing in both: 5384

Number failing in both: 434

Number passing in Base (35377df) but now fail: 0

Number failing in Base (35377df) but now pass: 0

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (partiql-eval@35377df). Click here to learn what that means.

Additional details and impacted files

@@               Coverage Diff               @@
##             partiql-eval    #1316   +/-   ##
===============================================
  Coverage                ?   49.26%           
  Complexity              ?     1046           
===============================================
  Files                   ?      166           
  Lines                   ?    13396           
  Branches                ?     2504           
===============================================
  Hits                    ?     6600           
  Misses                  ?     6139           
  Partials                ?      657           

Flag	Coverage Δ
CLI	11.86% <0.00%> (?)
EXAMPLES	80.28% <0.00%> (?)
LANG	54.71% <0.00%> (?)

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