don't include relation name in aliased expressions

[adriangb]

The logic is that if you do select col from t you get col as the output column name and not t.col in most data systems that I've used.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.17%. Comparing base (9cb9b1d) to head (befba8c).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #102      +/-   ##
==========================================
+ Coverage   84.12%   84.17%   +0.04%     
==========================================
  Files          16       16              
  Lines        1216     1213       -3     
  Branches     1216     1213       -3     
==========================================
- Hits         1023     1021       -2     
  Misses        131      131              
+ Partials       62       61       -1     

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[cetra3]

LGTM