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knowledge(performance): align SetLoadFields placement with AL Guidelines (#130)

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* knowledge(performance): align SetLoadFields placement with AL Guidelines (#120)

The AL Guidelines mark `SetLoadFields` placed before `SetRange`/`SetFilter`
as bad code and recommend filters first, while the BCQuality samples used
the opposite order — contradictory guidance across two Microsoft repos.

Per Learn (`Record.SetLoadFields`), "fields that are filtered upon are
always loaded", so the two orders produce an identical projection. The
upstream rule is a readability convention: keep `SetLoadFields` adjacent
to the read it governs.

- Reorder filters ahead of `SetLoadFields` in the six affected AL samples.
- State the placement convention in the Best Practice section.
- Record in Description that order does not change the projection, and
  that only a fieldless `SetLoadFields()` or a later overwriting call does.
- Add an Anti Pattern note so review agents treat the reverse order as a
  readability observation, never a performance defect.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

* Clarify partial-record projection changes

Document AddLoadFields, SetBaseLoadFields, and Reset alongside SetLoadFields so the statement-order guidance does not imply those APIs leave the projection unchanged.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: 89dba8c8-6529-4b60-956f-875a59be499d

---------

Co-authored-by: Jesper Schulz-Wedde <jesper.schulzwedde@microsoft.com>
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 89dba8c8-6529-4b60-956f-875a59be499d
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microsoft/knowledge/performance/use-setautocalcfields-for-per-row-flowfields.good.al
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@ -4,8 +4,8 @@ codeunit 50490 "Perf AutoCalcFields Good"
var
Customer: Record Customer;
begin
Customer.SetLoadFields("Credit Limit (LCY)");
Customer.SetFilter("Credit Limit (LCY)", '>0');
Customer.SetLoadFields("Credit Limit (LCY)");
Customer.SetAutoCalcFields("Balance (LCY)");
if Customer.FindSet() then
repeat