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Add BC performance knowledge from OptimAL learnings (#198)

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* Add BC performance knowledge from OptimAL learnings

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

* Address review feedback on performance guidance

Clarify predicate-supporting keys versus covering queries, demonstrate proven cache reuse, and evaluate the updated partial-load and bulk-update rules.

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

---------

Co-authored-by: Jesper Schulz-Wedde <jesper.schulzwedde@microsoft.com>
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
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Jesper Schulz-Wedde 2026-09-29 17:21:28 +02:00 • committed by GitHub
parent 56ce52a9c7
commit 87ba36e650
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37 changed files with 920 additions and 37 deletions
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38
microsoft/knowledge/performance/design-covering-keys-from-read-pattern.bad.al Normal file
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table 50360 "Perf Read Entry"
{
DataClassification = CustomerContent;
fields
{
field(1; "Entry No."; Integer) { }
field(2; "Customer No."; Code[20]) { }
field(3; "Posting Date"; Date) { }
field(4; "Item No."; Code[20]) { }
field(5; Quantity; Decimal) { }
field(6; Description; Text[100]) { }
}
keys
{
key(PK; "Entry No.") { Clustered = true; }
key(ByDescription; Description, "Item No.", "Posting Date") { }
key(ByQuantity; Quantity, "Customer No.") { }
}
}
codeunit 50361 "Perf Read Entry Bad"
{
procedure SumNonblankItems(CustomerNo: Code[20]; FromDate: Date; ToDate: Date) Total: Decimal
var
Entry: Record "Perf Read Entry";
begin
Entry.SetRange("Customer No.", CustomerNo);
Entry.SetRange("Posting Date", FromDate, ToDate);
Entry.SetLoadFields("Item No.", Quantity);
if Entry.FindSet() then
repeat
if Entry."Item No." <> '' then
Total += Entry.Quantity;
until Entry.Next() = 0;
end;
}