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@vvereen vvereen commented Jun 1, 2026

Thank you for contributing to Microsoft Fabric documentation

Fill out these items before submitting your pull request:

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Kelly Gremban

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Learn Build status updates of commit 0c9ed1c:

✅ Validation status: passed

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docs/fundamentals/direct-lake-how-it-works.md ✅Succeeded
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vvereen commented Jun 1, 2026

@microsoft-github-policy-service agree [company="{Microsoft}"]

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Learn Build status updates of commit 0c9ed1c:

✅ Validation status: passed

File Status Preview URL Details
docs/fundamentals/direct-lake-how-it-works.md ✅Succeeded
docs/fundamentals/media/direct-lake-how-it-works/direct-lake-behavior-setting.png ✅Succeeded

For more details, please refer to the build report.

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Hi @vvereen - It looks like you accidentally opened this PR in the public repo. PMs should work in the private repo, per the Microsoft Docs contributor guide. We can keep this PR open for review and merge, but would you make future content updates in the private repo? Thank you!

**

@kgremban

Can you review the proposed changes?

IMPORTANT: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
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@vvereen please read the following Contributor License Agreement(CLA). If you agree with the CLA, please reply with the following information.

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Approved, but some changes suggested to improve formatting and clarity.

Comment thread docs/fundamentals/direct-lake-how-it-works.md Outdated
Comment thread docs/fundamentals/direct-lake-how-it-works.md Outdated
Comment thread docs/fundamentals/direct-lake-how-it-works.md Outdated
vvereen and others added 3 commits June 1, 2026 18:21
Co-authored-by: Kelly Gremban <kgremban@microsoft.com>
Co-authored-by: Kelly Gremban <kgremban@microsoft.com>
Co-authored-by: Kelly Gremban <kgremban@microsoft.com>
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Learn Build status updates of commit 746bba2:

✅ Validation status: passed

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docs/fundamentals/direct-lake-how-it-works.md ✅Succeeded
docs/fundamentals/media/direct-lake-how-it-works/direct-lake-behavior-setting.png ✅Succeeded

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Learn Build status updates of commit fd87e1b:

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> If possible, you should always design your solution—or size your capacity—to avoid DirectQuery fallback. That's because it might result in slower query performance.

You can control fallback of your Direct Lake semantic models by setting its _DirectLakeBehavior_ property. This setting only applies to Direct Lake on SQL endpoints. Direct Lake on OneLake doesn't support DirectQuery fallback. For more information, see [Model.DirectLakeBehavior Property](/dotnet/api/microsoft.analysisservices.tabular.model.directlakebehavior).
Direct Lake on OneLake does not support DirectQuery fallback and operates only in DirectLakeOnly mode. If you need to avoid fallback entirely, consider using Direct Lake on OneLake. Direct Lake on Onelake is the recommended Direct Lake flavor for new semantic model applications.
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If you need to avoid fallback entirely, consider using Direct Lake on OneLake.

a bit weird sentence if i am being honest, best if we remove it entirely, in this case less is more :)

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Agreed, we can remove it.

- Number of row groups is within limit
- Number of rows is within limit
- The semantic model has been refreshed (framed) since the underlying Delta tables were created or modified.
- The capacity is not under memory pressure.
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not true

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I can remove rows 100 & 101, are the rest are still accurate? Apologies pulled these two from community blog posts.


Queries use Direct Lake mode only when *all* of the following conditions are satisfied:

- No tables referenced by the semantic model have SQL [row-level security (RLS)](direct-lake-security-integration.md) defined at the SQL analytics endpoint.
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those are conditions for using VertiPlans in DirectLake SQL.. it miscommunicates things to customers.

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Would naming the section "Conditions for avoiding DirectQuery fallback" be better?

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vvereen commented Jun 2, 2026

Hi @vvereen - It looks like you accidentally opened this PR in the public repo. PMs should work in the private repo, per the Microsoft Docs contributor guide. We can keep this PR open for review and merge, but would you make future content updates in the private repo? Thank you!

**

@kgremban

Can you review the proposed changes?

IMPORTANT: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged" @MicrosoftDocs/public-repo-pr-review-team

@v-regandowner, @kgremban Apologies, I have not used this process before but will ensure to use the Private Repo next time. As there are changes needed and potential new ownership, would it be best if we close and reopen on the Private Repo?

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Hi @vvereen - It looks like you accidentally opened this PR in the public repo. PMs should work in the private repo, per the Microsoft Docs contributor guide. We can keep this PR open for review and merge, but would you make future content updates in the private repo? Thank you!
**
@kgremban
Can you review the proposed changes?
IMPORTANT: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.
#label:"aq-pr-triaged" @MicrosoftDocs/public-repo-pr-review-team

@v-regandowner, @kgremban Apologies, I have not used this process before but will ensure to use the Private Repo next time. As there are changes needed and potential new ownership, would it be best if we close and reopen on the Private Repo?

@vvereen It'd be best to have these moved to private so the content can be staged and validated by the current validation rules.

After you make your changes in the private repo, review the articles on staging, and fix any validation issues, you can add the sign-off comment to let PR reviewers know that the updates are ready to be merged.

cc: @kgremban

Removed and renamed 2 things based on comments
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Learn Build status updates of commit bb38f83:

✅ Validation status: passed

File Status Preview URL Details
docs/fundamentals/direct-lake-how-it-works.md ✅Succeeded
docs/fundamentals/media/direct-lake-how-it-works/direct-lake-behavior-setting.png ✅Succeeded

For more details, please refer to the build report.

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