Add TDigest histogram as metric#139247
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elasticsearchmachine merged 10 commits intoelastic:mainfrom Dec 11, 2025
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...wnsample/src/main/java/org/elasticsearch/xpack/downsample/TDigestHistogramFieldProducer.java
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Looks good! Just some small changes on testing.
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* upstream/main: (79 commits)
Mute org.elasticsearch.test.rest.yaml.CcsCommonYamlTestSuiteIT test {p0=search/140_pre_filter_search_shards/prefilter on non-indexed date fields} elastic#139381
Adjust error bounds for bfloat16 value checks (elastic#139371)
Unmute some vector CSS tests (elastic#139370)
Do not allow `project_routing` as a query param (elastic#139206)
Unmute HalfFloat...Tests#testSynthesizeArrayRandom (elastic#139341)
Remove leniency in LinkedProjectConfig builder methods (elastic#139012)
EQL: fix project_routing (elastic#139366)
Add patch version for 9.2 index version constant (elastic#139362)
Mute org.elasticsearch.test.rest.yaml.RcsCcsCommonYamlTestSuiteIT test {p0=search.vectors/200_dense_vector_docvalue_fields/dense_vector docvalues with bfloat16} elastic#139368
ES|QL: Enable CCS tests for FORK (elastic#139302)
Restructuring the semantic_text field type page (elastic#138571)
AggregateMetricDouble fields should not build BKD indexes (elastic#138724)
Feature/count by trunc with filter (elastic#138765)
ESQL: Convert TS 500 error to 400 (elastic#139360)
[CI] Rerun failing tests for periodic build pipelines (elastic#139200)
revert muting saml test (elastic#139327)
Add TDigest histogram as metric (elastic#139247)
Links solved bugs to class cast exception changelog and unmutes errors (elastic#139340)
Ensure integer sorts are rewritten to long sorts for BWC indexes (elastic#139293)
Integrate stored fields format bloom filter with synthetic _id (elastic#138515)
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In this PR we allow the metric type
histogramto support field typehistogram(legacy histograms) and we support downsampling them using the TDigest method.Part of #136294