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SQL style null-on-empty semantics for Sum and Mean - #9113

Merged

mhk197 merged 18 commits into

mk/unify-sums-v2

Aug 7, 2026

Commits on Aug 7, 2026
- Use canonical partial state for Sum
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  61bf257
- Encode Sum partial shape in aggregate options
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  a3e5f33
- Simplify grouped aggregate benchmark helpers
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  09a1b4c
- Preserve cached stat validation outside Sum
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  1a78215
- Special-case Sum stat result dtype
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  784c690
- Restore cached Sum fast path
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  31ca2c2
- clean
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  8dadbdd
- Validate canonical Sum partial state
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  7dc9887
- Narrow Sum helper visibility
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  4f60d67
- fix
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  b36dab0
- fix
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  daaad48
- Use canonical Sum partials at runtime
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  37dbbb6
- Optimize grouped sum finalization
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  0bc5ac5
- Update null-on-empty Sum expectations
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  25d8216
- fix
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  86f1af8
- fix
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  1664756
- perf: avoid grouped sum bitmap appends
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  bf3c8f5
- perf: streamline sum partial handling
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  e2b15cb