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[9.3] T digest field type docs #140478 #141368

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elasticsearchmachine merged 1 commit intoelastic:9.3from
not-napoleon:backport/9.3/pr-140478
Jan 27, 2026
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[9.3] T digest field type docs #140478 #141368
elasticsearchmachine merged 1 commit intoelastic:9.3from
not-napoleon:backport/9.3/pr-140478

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This adds documentation for the new t-digest field type.

backport of #140478

Adds documentation for the T-Digest field type, and makes a small change to the Exponential Histogram field type docs for consistency.

While working on this, we decided the initial way of specifying the digest type for the t-digest field was overly complex, and moved to a simpler set of choices.  That code change is also included in this mostly docs update.
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Co-authored-by: Liam Thompson <[email protected]>
Co-authored-by: elasticsearchmachine <[email protected]>

 Conflicts:
	docs/reference/elasticsearch/mapping-reference/exponential-histogram.md
	docs/reference/elasticsearch/toc.yml
	docs/reference/query-languages/esql/limitations.md
@not-napoleon not-napoleon added >enhancement backport auto-merge-without-approval Automatically merge pull request when CI checks pass (NB doesn't wait for reviews!) :StorageEngine/Mapping The storage related side of mappings v9.3.1 labels Jan 27, 2026
@elasticsearchmachine elasticsearchmachine merged commit fece86b into elastic:9.3 Jan 27, 2026
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@not-napoleon not-napoleon deleted the backport/9.3/pr-140478 branch January 27, 2026 16:47
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