bcquality/microsoft/knowledge/performance/use-findset-with-next.md
Jesper Schulz-Wedde 9a4198eb28 Add [all] sentinel to bc-version; apply to version-agnostic knowledge
Most of the corpus — FindSet/SetLoadFields/CalcFields patterns, permission
sets, SingleInstance codeunits, DataClassification, IsolatedStorage,
transaction scope, SecretText — describes BC platform behaviour that is
identical across supported versions. The seed [26..28] range on every
file implied a version-specificity the content does not actually have,
and there was no way to express "applies to every version" in the
schema the way [w1] and [all] already do for countries and
application-area.

Extend the v1 schema with a universal sentinel for bc-version, parallel
to the sentinels already defined for the other dimensions:

  bc-version: [all]         # applies to every BC version

[all] is mutually exclusive with explicit versions. Range shorthand
([26..28]) and explicit lists ([26, 27, 28]) continue to work for files
genuinely tied to a version-gated API or deprecation.

Update read.md (field definition, matching semantics, partial-context
rule), write.md (default to [all], use ranges only with a concrete
reason), README.md (frontmatter example), and the CI validator. All
forty existing knowledge files and the three action skills convert to
[all]; none of the current content is version-gated. Validator passes.
2026-04-23 16:00:03 +02:00

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Markdown

---
bc-version: [all]
domain: performance
keywords: [findset, next, repeat, iteration, aa0181]
technologies: [al]
countries: [w1]
application-area: [all]
---
# Use FindSet with Next for iteration
> **Seed article.** Converted from an existing performance-review prompt to bootstrap the BCQuality performance corpus. Domain stewards should expand, restructure, and refine as needed.
## Description
When iterating over a filtered set of records with repeat-until, use FindSet together with Next. CodeCop rule AA0181 requires FindSet or Find to be paired with Next; using FindFirst or FindLast as the loop starter misrepresents intent and leads to rule AA0233.
## Best Practice
Call FindSet to start the iteration and Next to advance. Guard the loop with the standard `if FindSet() then ... until Next() = 0` idiom so callers can still handle the empty-set case.
See sample: `use-findset-with-next.good.al`.
## Anti Pattern
Starting a repeat-until loop with FindFirst or FindLast reads only one row and then calls Next on an iterator that was not intended for full-set traversal. The platform pays extra work to fetch the single row and the loop silhouette is misleading to reviewers.
See sample: `use-findset-with-next.bad.al`.