mirror of
https://github.com/microsoft/BCQuality.git
synced 2026-10-05 14:46:55 +01:00
2b5550c346
Lead with a complete plugin quick start and add task-oriented usage, troubleshooting, customization, and contribution guides. Preserve the broader plugin framing, correct conflicting contract guidance, support Agents folder reviews, and align repository validation. Convert existing sample references to clickable links without changing knowledge rules. Co-authored-by: Jesper Schulz-Wedde <jesper.schulzwedde@microsoft.com> Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
26 lines
1.7 KiB
Markdown
26 lines
1.7 KiB
Markdown
---
|
|
bc-version: [all]
|
|
domain: performance
|
|
keywords: [setautocalcfields, calcfields, calcsums, flowfield, loop, per-row]
|
|
technologies: [al]
|
|
countries: [w1]
|
|
application-area: [all]
|
|
---
|
|
|
|
# Use SetAutoCalcFields when each iterated row needs a FlowField
|
|
|
|
## Description
|
|
|
|
`Record.SetAutoCalcFields` has been available since runtime 1.0 and makes the specified FlowFields calculate as records are retrieved. Microsoft's [AL database-method performance guidance](https://learn.microsoft.com/en-us/dynamics365/business-central/dev-itpro/administration/optimize-sql-al-database-methods-and-performance-on-server#setautocalcfields) uses it to remove an explicit `CalcFields` call from every iteration when each row's FlowField drives a branch. This is different from `CalcSums`, which returns a total for the filtered set rather than a value for each row.
|
|
|
|
## Best Practice
|
|
|
|
Call `SetAutoCalcFields` before `FindSet` when every returned row needs the same FlowField for a comparison, branch, or per-record action. Use `CalcSums` instead when the required result is one aggregate over the filtered set (see `calcsums-instead-of-calcfields-in-loop.md`).
|
|
|
|
See sample: [`use-setautocalcfields-for-per-row-flowfields.good.al`](use-setautocalcfields-for-per-row-flowfields.good.al).
|
|
|
|
## Anti Pattern
|
|
|
|
Calling `CalcFields` inside the loop when every iteration reads the same FlowField. Each `CalcFields` request requires a separate SQL statement unless a compatible recent result is cached. Do not replace row-specific decisions with `CalcSums`; an aggregate cannot preserve which rows met the condition.
|
|
|
|
See sample: [`use-setautocalcfields-for-per-row-flowfields.bad.al`](use-setautocalcfields-for-per-row-flowfields.bad.al).
|