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Drop unverified claim about where-filtered relations

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The Table Relations Metadata mapping of where(...) filters to
Condition Field No. is not documented and could not be verified; the
rule does not depend on it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Michael Dieringer 2026-10-01 23:35:21 +02:00
parent 01967ff808
commit 89411ef60a
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microsoft/knowledge/data-modeling/tablerelation-field-length-must-match-related-field.md
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@ -20,7 +20,7 @@ The length Business Central's own relation check expects depends on whether the
- **At least one unconditional relation**, either a plain `TableRelation = X` or an unconditional branch: the field must have the **exact** length of the longest related field and the same type. - **At least one unconditional relation**, either a plain `TableRelation = X` or an unconditional branch: the field must have the **exact** length of the longest related field and the same type.
- **Only conditional relations** (`if (...) X else if (...) Y`): the field must be **at least** as long as the longest related field. A longer field is accepted. - **Only conditional relations** (`if (...) X else if (...) Y`): the field must be **at least** as long as the longest related field. A longer field is accepted.
A `where(...)` filter on a relation doesn't make it conditional. For the type, the check requires the related field's type, or `Text` when the related fields mix `Code` and `Text`. Only under all-conditional relations, and only when the required type is `Code`, may the field be `Text` instead. For the type, the check requires the related field's type, or `Text` when the related fields mix `Code` and `Text`. Only under all-conditional relations, and only when the required type is `Code`, may the field be `Text` instead.
The check skips any field that sets `ValidateTableRelation = false` or `TestTableRelation = false`. The Base Application sets `ValidateTableRelation = false` on filter and totaling fields, which hold a filter expression rather than one key value. Such a field may be longer than the related field. A field that is shorter than the related field is still a defect even with either property set to `false`, because a real related value still overflows it at runtime. The check skips any field that sets `ValidateTableRelation = false` or `TestTableRelation = false`. The Base Application sets `ValidateTableRelation = false` on filter and totaling fields, which hold a filter expression rather than one key value. Such a field may be longer than the related field. A field that is shorter than the related field is still a defect even with either property set to `false`, because a real related value still overflows it at runtime.