[multistage] add cast function

[walterddr]

No description provided.

[codecov-commenter]

Codecov Report

Merging #9384 (69d05b4) into master (c5a2ec5) will decrease coverage by 25.69%.
The diff coverage is 64.70%.

@@              Coverage Diff              @@
##             master    #9384       +/-   ##
=============================================
- Coverage     62.80%   37.11%   -25.70%     
+ Complexity     4569      194     -4375     
=============================================
  Files          1873     1885       +12     
  Lines        100061   100429      +368     
  Branches      15241    15280       +39     
=============================================
- Hits          62848    37270    -25578     
- Misses        32502    60052    +27550     
+ Partials       4711     3107     -1604     

Flag	Coverage Δ
integration1	26.10% <0.00%> (+0.07%)	⬆️
integration2	24.85% <0.00%> (+0.01%)	⬆️
unittests1	?
unittests2	15.37% <64.70%> (?)

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

Impacted Files	Coverage Δ
...che/pinot/query/planner/logical/RexExpression.java	74.35% <64.70%> (-1.84%)	⬇️
...in/java/org/apache/pinot/spi/utils/BytesUtils.java	0.00% <0.00%> (-100.00%)	⬇️
.../java/org/apache/pinot/spi/utils/BooleanUtils.java	0.00% <0.00%> (-100.00%)	⬇️
...java/org/apache/pinot/spi/trace/BaseRecording.java	0.00% <0.00%> (-100.00%)	⬇️
...java/org/apache/pinot/spi/trace/NoOpRecording.java	0.00% <0.00%> (-100.00%)	⬇️
...ava/org/apache/pinot/spi/config/table/FSTType.java	0.00% <0.00%> (-100.00%)	⬇️
...ava/org/apache/pinot/spi/config/user/RoleType.java	0.00% <0.00%> (-100.00%)	⬇️
...ava/org/apache/pinot/spi/data/MetricFieldSpec.java	0.00% <0.00%> (-100.00%)	⬇️
...ava/org/apache/pinot/spi/utils/NullValueUtils.java	0.00% <0.00%> (-100.00%)	⬇️
...java/org/apache/pinot/common/tier/TierFactory.java	0.00% <0.00%> (-100.00%)	⬇️
... and 1234 more

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[siddharthteotia]

@walterddr can you rebase please