From 8f12eb6f88e08389a81916c9075887522f60c91d Mon Sep 17 00:00:00 2001 From: Jesper Schulz-Wedde Date: Wed, 2 Sep 2026 14:34:11 +0200 Subject: [PATCH] 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 --- .../performance/use-setloadfields-for-partial-records.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/microsoft/knowledge/performance/use-setloadfields-for-partial-records.md b/microsoft/knowledge/performance/use-setloadfields-for-partial-records.md index 1dcb8ba..a8d134f 100644 --- a/microsoft/knowledge/performance/use-setloadfields-for-partial-records.md +++ b/microsoft/knowledge/performance/use-setloadfields-for-partial-records.md @@ -11,11 +11,11 @@ application-area: [all] ## Description -`SetLoadFields(...)` declares the subset of normal fields the next read should materialize, "reducing data read and transfer thereby improving performance significantly." Per the upstream guidance, "the gains scale with the amount of rows read, so for loops that read many rows `SetLoadFields` is even more important." Primary-key fields, `SystemId`, and system audit fields are loaded automatically, "and fields that are filtered on are also automatically included" — those do not need to appear in the list. `SetLoadFields` only affects `FieldClass = Normal`; it does not narrow FlowFields or FlowFilters. Its position relative to `SetRange`/`SetFilter` does not change the projection: filtered fields are added to the load set at read time either way. Only a fieldless `SetLoadFields()` — which resets the selection to all readable normal fields — or a later `SetLoadFields(...)` overwriting an earlier one changes what is loaded. +`SetLoadFields(...)` declares the subset of normal fields the next read should materialize, "reducing data read and transfer thereby improving performance significantly." Per the upstream guidance, "the gains scale with the amount of rows read, so for loops that read many rows `SetLoadFields` is even more important." Primary-key fields, `SystemId`, and system audit fields are loaded automatically, "and fields that are filtered on are also automatically included" — those do not need to appear in the list. `SetLoadFields` only affects `FieldClass = Normal`; it does not narrow FlowFields or FlowFilters. Its position relative to `SetRange`/`SetFilter` does not change the projection: filtered fields are added to the load set at read time either way. Projection-changing operations are separate: `AddLoadFields(...)` expands the selection, a later `SetLoadFields(...)` or `SetBaseLoadFields()` overwrites it, and `Reset()` or a fieldless `SetLoadFields()` restores all readable normal fields. ## Best Practice -Before a `Get`, `FindSet`, or `FindFirst` that the procedure follows by reading only a handful of the table's fields, call `SetLoadFields` listing exactly those fields. The pattern `SetLoadFields(...); if Record.Get(...) then ...` is the upstream-endorsed shape. Place the call immediately before the read, after any `SetRange`/`SetFilter`, so a reader can see at a glance which read the selection governs and so no intervening statement can reset it. Skip `SetLoadFields` when the table has few fields (under ten), when the code reads most of them (above 60 %), when the loop runs ten or fewer iterations, or when the table is exempt for other reasons (`singleton-setup-tables-need-no-access-optimization.md`, `temporary-tables-have-no-database-cost.md`). For report dataitems, use `AddLoadFields` in `OnPreDataItem` instead (see `addloadfields-in-report-onpredataitem.md`). +Before a `Get`, `FindSet`, or `FindFirst` that the procedure follows by reading only a handful of the table's fields, call `SetLoadFields` listing exactly those fields. The pattern `SetLoadFields(...); if Record.Get(...) then ...` is the upstream-endorsed shape. Place the call immediately before the read, after any `SetRange`/`SetFilter`, so a reader can see at a glance which read the selection governs and any projection-changing operation is easy to spot. Skip `SetLoadFields` when the table has few fields (under ten), when the code reads most of them (above 60 %), when the loop runs ten or fewer iterations, or when the table is exempt for other reasons (`singleton-setup-tables-need-no-access-optimization.md`, `temporary-tables-have-no-database-cost.md`). For report dataitems, use `AddLoadFields` in `OnPreDataItem` instead (see `addloadfields-in-report-onpredataitem.md`). See sample: `use-setloadfields-for-partial-records.good.al`.