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ESQL: Add support for exponential_histogram as case value #138300

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Merged
merged 3 commits into from
Nov 20, 2025
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Merged

ESQL: Add support for exponential_histogram as case value #138300

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ESQL: Add support for exponential_histogram as case value
JonasKunz Nov 19, 2025
f2ef795
[CI] Auto commit changes from spotless
Nov 19, 2025
3db7898
Merge branch 'main' into esql-exphisto-case
JonasKunz Nov 20, 2025
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13 changes: 13 additions & 0 deletions x-pack/plugin/esql/qa/testFixtures/src/main/resources/exponential_histogram.csv-spec
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Original file line number Diff line number Diff line change
Expand Up @@ -80,6 +80,19 @@ NULL | NULL | NULL
;


histoAsCaseValue
required_capability: exponential_histogram_minmax_support

FROM exp_histo_sample
| INLINE STATS p50 = PERCENTILE(responseTime, 50) BY instance, @timestamp
| EVAL filteredHisto = CASE(p50 > 0.1, responseTime)
| INLINE STATS filteredMax = MAX(filteredHisto) BY instance, @timestamp //MAX is null if the histogram is null
| STATS filteredCount = COUNT(filteredMax)
;

filteredCount:long
3
;

ungroupedPercentiles
required_capability: exponential_histogram_percentiles_support
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6 changes: 4 additions & 2 deletions ...c/main/java/org/elasticsearch/xpack/esql/expression/function/scalar/conditional/Case.java
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Expand Up @@ -81,7 +81,8 @@ ConditionEvaluatorSupplier toEvaluator(ToEvaluator toEvaluator) {
"keyword",
"long",
"unsigned_long",
"version" },
"version",
"exponential_histogram" },
description = """
Accepts pairs of conditions and values. The function returns the value that
belongs to the first condition that evaluates to `true`.
Expand Down Expand Up @@ -126,7 +127,8 @@ public Case(
"long",
"text",
"unsigned_long",
"version" },
"version",
"exponential_histogram" },
description = "The value that’s returned when the corresponding condition is the first to evaluate to `true`. "
+ "The default value is returned when no condition matches."
) List<Expression> rest
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1 change: 0 additions & 1 deletion ...t/java/org/elasticsearch/xpack/esql/expression/function/scalar/conditional/CaseTests.java
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Expand Up @@ -66,7 +66,6 @@ public class CaseTests extends AbstractScalarFunctionTestCase {
if (Build.current().isSnapshot()) {
t.addAll(
DataType.UNDER_CONSTRUCTION.stream()
.filter(type -> type != DataType.EXPONENTIAL_HISTOGRAM) // TODO(b/133393): implement
.filter(type -> type != DataType.AGGREGATE_METRIC_DOUBLE && type != DataType.DENSE_VECTOR)
.toList()
);
Expand Down