---
id: object/table/5378
type: object
title: Table 5378 "Synth. Relation Mapping Buffer"
summary: Table 5378 "Synth. Relation Mapping Buffer" in Base Application. 27 fields. Introduced in BC24, still in BC30.
tier: official
language: en
tags:
  - table
  - base application
versions:
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  last_changed: null
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review:
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generated:
  at: "2026-10-11T00:31:51.816Z"
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evidence:
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    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/Integration/Dataverse/SynthRelationMappingBuffer.Table.al
    title: src/Layers/W1/BaseApp/Integration/Dataverse/SynthRelationMappingBuffer.Table.al (releases/29.x)
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object_type: table
object_id: 5378
name: Synth. Relation Mapping Buffer
namespace: null
app: Base Application
extends: null
first_version: "24"
last_version: "30"
present_in:
  - "24"
  - "25"
  - "26"
  - "27"
  - "28"
  - "29"
  - "30"
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source_major: "29"
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counts:
  fields: 27
  procedures: 0
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relations:
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  pages: 4
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---

# Table 5378 "Synth. Relation Mapping Buffer"

> Table 5378 "Synth. Relation Mapping Buffer" in Base Application. 27 fields. Introduced in BC24, still in BC30.

Base Application · BC24-30 · [source at ea08af5e](https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/Integration/Dataverse/SynthRelationMappingBuffer.Table.al) · facts from BC29

## Properties

| Property | Value |
|---|---|
| TableType | Temporary |
| DataClassification | CustomerContent |

## Fields

Explanation: the field's ToolTip in the code; without one, the ToolTip of a page control bound to the field (marked via the page); without that, its Caption (marked caption) when that differs from the name.

| No. | Name | Type | Explanation | Notes |
|---|---|---|---|---|
| 1 | Synth. Relation Name | Text[100] | Specifies the name of the synthetic relation. <small>via [Page 5478 "Synthetic Relation Details"](../page/5478.md)</small> |  |
| 2 | Rel. Native Entity Name | Text[100] | Specifies the name of the native entity. <small>via [Page 5478 "Synthetic Relation Details"](../page/5478.md)</small> |  |
| 3 | Rel. Virtual Entity Name | Text[100] | Specifies the name of the virtual entity. <small>via [Page 5478 "Synthetic Relation Details"](../page/5478.md)</small> |  |
| 4 | Virtual Table Caption | Text[200] | Specifies the virtual table name. <small>via [Page 5375 "Synth. Relation Mapping"](../page/5375.md)</small> |  |
| 5 | Virtual Table Logical Name | Text[100] | Specifies the virtual table logical name. <small>via [Page 5375 "Synth. Relation Mapping"](../page/5375.md)</small> |  |
| 6 | Syncd. Table Name | Text[80] | Specifies the integration table name. <small>via [Page 5375 "Synth. Relation Mapping"](../page/5375.md)</small> |  |
| 7 | Syncd. Table External Name | Text[248] | Specifies the integration table external name. <small>via [Page 5375 "Synth. Relation Mapping"](../page/5375.md)</small> |  |
| 8 | Syncd. Table Id | Integer | — |  |
| 9 | Syncd. Field 1 Name | Text[80] | Specifies the integration field name. <small>via [Page 5375 "Synth. Relation Mapping"](../page/5375.md)</small> |  |
| 10 | Syncd. Field 1 External Name | Text[100] | Specifies the name of the native field used for the relation. <small>via [Page 5478 "Synthetic Relation Details"](../page/5478.md)</small> |  |
| 11 | Syncd. Field 1 Id | Integer | — |  |
| 12 | Virtual Table Column 1 Caption | Text[200] | Specifies the name of the virtual table's column. <small>via [Page 5375 "Synth. Relation Mapping"](../page/5375.md)</small> |  |
| 13 | Virtual Table Column 1 Name | Text[100] | Specifies the name of the field in the virtual table used for the relation. <small>via [Page 5478 "Synthetic Relation Details"](../page/5478.md)</small> |  |
| 14 | Syncd. Field 2 Name | Text[80] | — |  |
| 15 | Syncd. Field 2 External Name | Text[100] | Specifies the name of the native field used for the relation. <small>via [Page 5478 "Synthetic Relation Details"](../page/5478.md)</small> |  |
| 16 | Syncd. Field 2 Id | Integer | — |  |
| 17 | Virtual Table Column 2 Caption | Text[200] | — |  |
| 18 | Virtual Table Column 2 Name | Text[100] | Specifies the name of the field in the virtual table used for the relation. <small>via [Page 5478 "Synthetic Relation Details"](../page/5478.md)</small> |  |
| 19 | Syncd. Field 3 Name | Text[80] | — |  |
| 20 | Syncd. Field 3 External Name | Text[100] | Specifies the name of the native field used for the relation. <small>via [Page 5478 "Synthetic Relation Details"](../page/5478.md)</small> |  |
| 21 | Syncd. Field 3 Id | Integer | — |  |
| 22 | Virtual Table Column 3 Caption | Text[200] | — |  |
| 23 | Virtual Table Column 3 Name | Text[100] | Specifies the name of the field in the virtual table used for the relation. <small>via [Page 5478 "Synthetic Relation Details"](../page/5478.md)</small> |  |
| 24 | Relation Id | Guid | — |  |
| 25 | Relation Created | Boolean | — |  |
| 26 | Virtual Table Phys. Name | Text[100] | Specifies the virtual table physical name. <small>via [Page 5375 "Synth. Relation Mapping"](../page/5375.md)</small> |  |
| 27 | Virtual Table API Page Id | Integer | Specifies the virtual table API page ID in Business Central. <small>via [Page 5375 "Synth. Relation Mapping"](../page/5375.md)</small> |  |

## Keys

- PK: Synth. Relation Name, Virtual Table Logical Name, Syncd. Table Id, Syncd. Field 1 Id, Syncd. Field 2 Id, Syncd. Field 3 Id, Virtual Table Column 1 Name, Virtual Table Column 2 Name, Virtual Table Column 3 Name (clustered)

## Pages and codeunits on this table

- [Page 5374 "New Synthetic Relation Wiz."](../page/5374.md) (source table)
- [Page 5375 "Synth. Relation Mapping"](../page/5375.md) (source table)
- [Page 5376 "Synthetic Relations"](../page/5376.md) (source table)
- [Page 5478 "Synthetic Relation Details"](../page/5478.md) (source table)

## Across versions

- Present in: BC24-30
- Changed (declaration) in: none

Source: AL metadata extracted from the code (names, ids, signatures, properties); no code bodies (D10).

## Ask your agent

Procedure bodies are not stored here (D10). For a procedure body or the calls of one procedure, ask bc-code-atlas (external, by Stefan Maron, MIT; default corpus w1-28), which the bc-observatory plugin connects: `bcatlas_resolve_node(object_type: "table", object_name: "Synth. Relation Mapping Buffer")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.