[multistage][bugfix] fix literal query return multiple duplicate results

[walterddr]

this fixes #11821

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (d1cc17c) 61.53% compared to head (76cdf46) 61.50%.
Report is 5 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #12240      +/-   ##
============================================
- Coverage     61.53%   61.50%   -0.03%     
  Complexity      207      207              
============================================
  Files          2416     2416              
  Lines        131177   131181       +4     
  Branches      20245    20247       +2     
============================================
- Hits          80717    80685      -32     
- Misses        44570    44601      +31     
- Partials       5890     5895       +5     

Flag	Coverage Δ
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integration1	<0.01% <0.00%> (ø)
integration2	0.00% <0.00%> (ø)
java-11	61.49% <100.00%> (+<0.01%)	⬆️
java-21	27.70% <0.00%> (-33.69%)	⬇️
skip-bytebuffers-false	61.50% <100.00%> (-0.03%)	⬇️
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temurin	61.50% <100.00%> (-0.03%)	⬇️
unittests	61.50% <100.00%> (-0.03%)	⬇️
unittests1	46.59% <100.00%> (-0.04%)	⬇️
unittests2	27.69% <0.00%> (-0.01%)	⬇️

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[xiangfu0]

lgtm, can you add one example in integration tests and quickstart?

[walterddr]

lgtm, can you add one example in integration tests and quickstart?

this one is trivial and i dont think we need an integration test. we will once we support a more complex literal join table type queries.