Developers can define indexes that span fields from a base table and its table extensions

Microsoft 365 roadmap 573315 · Development · generally available · roadmap status “Launched”, phase General Availability

What Microsoft says

The new data model for storing fields from table extensions allows developers to define keys across fields from the base table and table extensions.

Dates

• General availability: October CY2026 (2026 release wave 2)
• Public preview: not given
• On the roadmap since 2026-09-30, last changed 2026-09-30

Covered by

Matched by Haiku among videos and Learn pages in the same galaxy system, checked against the roadmap ids and the evidence text. Every link below was reviewed by Opus.

Videos

• What’s new in AL and Tools (2026 release wave 2): Mixed extension and base field SQL indexes at 15:39
• Creating TableExtensions in BC29 like we’re back in NAV (But Business Central): Cross-app keys in table extensions at 4:07
• Business Central 29.0: Major Change to Table Extensions & SQL.: Cross-field indexes spanning base and extension tables at 12:31
• What’s new: Server and Database (2026 release wave 2): Cross-table indexes at 6:37

Source: Microsoft 365 roadmap. Status words follow the roadmap.