enhance: support null expr

[smellthemoon]

#31728

[mergify]

@smellthemoon go-sdk check failed, comment rerun go-sdk can trigger the job again.

[mergify]

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[codecov]

Codecov Report

Attention: Patch coverage is 92.66667% with 11 lines in your changes missing coverage. Please review.

Project coverage is 81.16%. Comparing base (6b10583) to head (993e8bc).
Report is 7 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/core/src/exec/expression/NullExpr.cpp	90.41%	7 Missing ⚠️
internal/core/src/expr/ITypeExpr.h	55.55%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #38772      +/-   ##
==========================================
+ Coverage   81.13%   81.16%   +0.03%     
==========================================
  Files        1385     1387       +2     
  Lines      196059   196208     +149     
==========================================
+ Hits       159069   159250     +181     
+ Misses      31399    31375      -24     
+ Partials     5591     5583       -8     

Components	Coverage Δ
Client	79.12% <ø> (ø)
Core	69.54% <89.62%> (+0.09%)	⬆️
Go	83.13% <100.00%> (+0.02%)	⬆️

Files with missing lines	Coverage Δ
internal/core/src/common/Types.h	29.08% <ø> (ø)
...ernal/core/src/exec/expression/BinaryRangeExpr.cpp	93.01% <ø> (ø)
internal/core/src/exec/expression/Expr.cpp	94.40% <100.00%> (+0.24%)	⬆️
internal/core/src/exec/expression/NullExpr.h	100.00% <100.00%> (ø)
internal/core/src/exec/expression/UnaryExpr.cpp	84.58% <100.00%> (+0.06%)	⬆️
internal/core/src/query/PlanProto.cpp	88.79% <100.00%> (+0.34%)	⬆️
internal/core/src/query/PlanProto.h	18.51% <ø> (ø)
internal/parser/planparserv2/parser_visitor.go	86.47% <100.00%> (+0.42%)	⬆️
internal/parser/planparserv2/show_visitor.go	93.91% <100.00%> (+0.39%)	⬆️
internal/core/src/expr/ITypeExpr.h	46.12% <55.55%> (+0.28%)	⬆️
... and 1 more

... and 28 files with indirect coverage changes

[mergify]

@smellthemoon go-sdk check failed, comment rerun go-sdk can trigger the job again.

[smellthemoon]

rerun go-sdk

[tedxu]

What does this function do?

[smellthemoon]

To check if nullable is false, then the TargetBitmap is all true when is_not_null, and all false when is_null.

[mergify]

@smellthemoon E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[smellthemoon]

/run-cpu-e2e

[tedxu]

/lgtm

[tedxu]

/approve

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: smellthemoon, tedxu

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