[ES|QL] ToAggregateMetricDouble function (#124595)

This commit adds a conversion function from numerics (and aggregate
metric doubles) to aggregate metric doubles.

It is most useful when you have multiple indices, where one index uses
aggregate metric double (e.g. a downsampled index) and another uses a
normal numeric type like long or double (e.g. an index prior to
downsampling).

docs/changelog/124595.yaml

@@ -0,0 +1,5 @@
+pr: 124595
+summary: '`ToAggregateMetricDouble` function'
+area: "ES|QL"
+type: enhancement
+issues: []

docs/reference/query-languages/esql/_snippets/functions/description/to_aggregate_metric_double.md

@@ -0,0 +1,6 @@
+% This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+
+**Description**
+
+Encode a numeric to an aggregate_metric_double.
+

docs/reference/query-languages/esql/_snippets/functions/layout/to_aggregate_metric_double.md

@@ -0,0 +1,20 @@
+% This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+
+## `TO_AGGREGATE_METRIC_DOUBLE` [esql-to_aggregate_metric_double]
+
+**Syntax**
+
+:::{image} ../../../images/functions/to_aggregate_metric_double.svg
+:alt: Embedded
+:class: text-center
+:::
+
+
+:::{include} ../parameters/to_aggregate_metric_double.md
+:::
+
+:::{include} ../description/to_aggregate_metric_double.md
+:::
+
+:::{include} ../types/to_aggregate_metric_double.md
+:::

docs/reference/query-languages/esql/_snippets/functions/parameters/to_aggregate_metric_double.md

@@ -0,0 +1,7 @@
+% This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+
+**Parameters**
+
+`number`
+:   Input value. The input can be a single-valued column or an expression.
+

docs/reference/query-languages/esql/_snippets/functions/types/to_aggregate_metric_double.md

@@ -0,0 +1,8 @@
+% This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+
+**Supported types**
+
+| number | result |
+| --- | --- |
+aggregate_metric_double
+

docs/reference/query-languages/esql/images/functions/to_aggregate_metric_double.svg

@@ -0,0 +1 @@
+<svg version="1.1" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" width="528" height="46" viewbox="0 0 528 46"><defs><style type="text/css">.c{fill:none;stroke:#222222;}.k{fill:#000000;font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;font-size:20px;}.s{fill:#e4f4ff;stroke:#222222;}.syn{fill:#8D8D8D;font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;font-size:20px;}</style></defs><path class="c" d="M0 31h5m332 0h10m32 0h10m92 0h10m32 0h5"/><rect class="s" x="5" y="5" width="332" height="36"/><text class="k" x="15" y="31">TO_AGGREGATE_METRIC_DOUBLE</text><rect class="s" x="347" y="5" width="32" height="36" rx="7"/><text class="syn" x="357" y="31">(</text><rect class="s" x="389" y="5" width="92" height="36" rx="7"/><text class="k" x="399" y="31">number</text><rect class="s" x="491" y="5" width="32" height="36" rx="7"/><text class="syn" x="501" y="31">)</text></svg>

docs/reference/query-languages/esql/kibana/definition/functions/to_aggregate_metric_double.json

@@ -0,0 +1,9 @@
+{
+  "comment" : "This is generated by ESQL’s AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "scalar",
+  "name" : "to_aggregate_metric_double",
+  "description" : "Encode a numeric to an aggregate_metric_double.",
+  "signatures" : [ ],
+  "preview" : false,
+  "snapshot_only" : false
+}

docs/reference/query-languages/esql/kibana/docs/functions/to_aggregate_metric_double.md

@@ -0,0 +1,7 @@
+<!--
+This is generated by ESQL’s AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### TO_AGGREGATE_METRIC_DOUBLE
+Encode a numeric to an aggregate_metric_double.
+

server/src/main/java/org/elasticsearch/TransportVersions.java

@@ -192,6 +192,7 @@ public class TransportVersions {
     public static final TransportVersion INFERENCE_MODEL_REGISTRY_METADATA = def(9_032_0_00);
     public static final TransportVersion INTRODUCE_LIFECYCLE_TEMPLATE = def(9_033_0_00);
     public static final TransportVersion INDEXING_STATS_INCLUDES_RECENT_WRITE_LOAD = def(9_034_0_00);
+    public static final TransportVersion ESQL_AGGREGATE_METRIC_DOUBLE_LITERAL = def(9_035_0_00);
 
     /*
      * STOP! READ THIS FIRST! No, really,

x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/type/DataType.java

@@ -557,7 +557,6 @@ public enum DataType {
             && t != SOURCE
             && t != HALF_FLOAT
             && t != PARTIAL_AGG
-            && t != AGGREGATE_METRIC_DOUBLE
             && t.isCounter() == false;
     }
 

x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/data/AggregateMetricDoubleBlockBuilder.java

@@ -7,9 +7,17 @@
 
 package org.elasticsearch.compute.data;
 
+import org.elasticsearch.TransportVersion;
+import org.elasticsearch.TransportVersions;
+import org.elasticsearch.common.io.stream.GenericNamedWriteable;
+import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
+import org.elasticsearch.common.io.stream.StreamInput;
+import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.core.Releasables;
 import org.elasticsearch.index.mapper.BlockLoader;
 
+import java.io.IOException;
+
 public class AggregateMetricDoubleBlockBuilder extends AbstractBlockBuilder implements BlockLoader.AggregateMetricDoubleBuilder {
 
     private DoubleBlockBuilder minBuilder;
@@ -161,11 +169,40 @@ public class AggregateMetricDoubleBlockBuilder extends AbstractBlockBuilder impl
         }
     }
 
-    public record AggregateMetricDoubleLiteral(Double min, Double max, Double sum, Integer count) {
+    public record AggregateMetricDoubleLiteral(Double min, Double max, Double sum, Integer count) implements GenericNamedWriteable {
         public AggregateMetricDoubleLiteral {
             min = min.isNaN() ? null : min;
             max = max.isNaN() ? null : max;
             sum = sum.isNaN() ? null : sum;
         }
+
+        public static final NamedWriteableRegistry.Entry ENTRY = new NamedWriteableRegistry.Entry(
+            GenericNamedWriteable.class,
+            "AggregateMetricDoubleLiteral",
+            AggregateMetricDoubleLiteral::new
+        );
+
+        @Override
+        public String getWriteableName() {
+            return "AggregateMetricDoubleLiteral";
+        }
+
+        public AggregateMetricDoubleLiteral(StreamInput input) throws IOException {
+            this(input.readOptionalDouble(), input.readOptionalDouble(), input.readOptionalDouble(), input.readOptionalInt());
+        }
+
+        @Override
+        public void writeTo(StreamOutput out) throws IOException {
+            out.writeOptionalDouble(min);
+            out.writeOptionalDouble(max);
+            out.writeOptionalDouble(sum);
+            out.writeOptionalInt(count);
+        }
+
+        @Override
+        public TransportVersion getMinimalSupportedVersion() {
+            return TransportVersions.ESQL_AGGREGATE_METRIC_DOUBLE_LITERAL;
+        }
+
     }
 }

x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/data/BlockUtils.java

@@ -285,7 +285,19 @@ public final class BlockUtils {
                 DocVector v = ((DocBlock) block).asVector();
                 yield new Doc(v.shards().getInt(offset), v.segments().getInt(offset), v.docs().getInt(offset));
             }
-            case COMPOSITE -> throw new IllegalArgumentException("can't read values from composite blocks");
+            case COMPOSITE -> {
+                CompositeBlock compositeBlock = (CompositeBlock) block;
+                var minBlock = (DoubleBlock) compositeBlock.getBlock(AggregateMetricDoubleBlockBuilder.Metric.MIN.getIndex());
+                var maxBlock = (DoubleBlock) compositeBlock.getBlock(AggregateMetricDoubleBlockBuilder.Metric.MAX.getIndex());
+                var sumBlock = (DoubleBlock) compositeBlock.getBlock(AggregateMetricDoubleBlockBuilder.Metric.SUM.getIndex());
+                var countBlock = (IntBlock) compositeBlock.getBlock(AggregateMetricDoubleBlockBuilder.Metric.COUNT.getIndex());
+                yield new AggregateMetricDoubleLiteral(
+                    minBlock.getDouble(offset),
+                    maxBlock.getDouble(offset),
+                    sumBlock.getDouble(offset),
+                    countBlock.getInt(offset)
+                );
+            }
             case UNKNOWN -> throw new IllegalArgumentException("can't read values from [" + block + "]");
         };
     }

x-pack/plugin/esql/qa/testFixtures/src/main/java/org/elasticsearch/xpack/esql/EsqlTestUtils.java

@@ -20,6 +20,7 @@ import org.elasticsearch.common.bytes.BytesReference;
 import org.elasticsearch.common.regex.Regex;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.util.BigArrays;
+import org.elasticsearch.compute.data.AggregateMetricDoubleBlockBuilder;
 import org.elasticsearch.compute.data.BlockFactory;
 import org.elasticsearch.compute.data.BlockUtils;
 import org.elasticsearch.compute.data.BytesRefBlock;
@@ -788,6 +789,12 @@ public final class EsqlTestUtils {
             case CARTESIAN_POINT -> CARTESIAN.asWkb(ShapeTestUtils.randomPoint());
             case GEO_SHAPE -> GEO.asWkb(GeometryTestUtils.randomGeometry(randomBoolean()));
             case CARTESIAN_SHAPE -> CARTESIAN.asWkb(ShapeTestUtils.randomGeometry(randomBoolean()));
+            case AGGREGATE_METRIC_DOUBLE -> new AggregateMetricDoubleBlockBuilder.AggregateMetricDoubleLiteral(
+                randomDouble(),
+                randomDouble(),
+                randomDouble(),
+                randomInt()
+            );
             case NULL -> null;
             case SOURCE -> {
                 try {
@@ -798,8 +805,9 @@ public final class EsqlTestUtils {
                     throw new UncheckedIOException(e);
                 }
             }
-            case UNSUPPORTED, OBJECT, DOC_DATA_TYPE, TSID_DATA_TYPE, PARTIAL_AGG, AGGREGATE_METRIC_DOUBLE ->
+            case UNSUPPORTED, OBJECT, DOC_DATA_TYPE, TSID_DATA_TYPE, PARTIAL_AGG -> throw new IllegalArgumentException(
-                throw new IllegalArgumentException("can't make random values for [" + type.typeName() + "]");
+                "can't make random values for [" + type.typeName() + "]"
+            );
         }, type);
     }
 

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/action/EsqlCapabilities.java

@@ -896,7 +896,12 @@ public class EsqlCapabilities {
         /**
          * Non full text functions do not contribute to score
          */
-        NON_FULL_TEXT_FUNCTIONS_SCORING;
+        NON_FULL_TEXT_FUNCTIONS_SCORING,
+
+        /**
+         * Support for to_aggregate_metric_double function
+         */
+        AGGREGATE_METRIC_DOUBLE_CONVERT_TO(AGGREGATE_METRIC_DOUBLE_FEATURE_FLAG);
 
         private final boolean enabled;
 

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/expression/ExpressionWritables.java

@@ -14,6 +14,7 @@ import org.elasticsearch.xpack.esql.expression.function.aggregate.AggregateWrita
 import org.elasticsearch.xpack.esql.expression.function.fulltext.FullTextWritables;
 import org.elasticsearch.xpack.esql.expression.function.scalar.ScalarFunctionWritables;
 import org.elasticsearch.xpack.esql.expression.function.scalar.convert.FromBase64;
+import org.elasticsearch.xpack.esql.expression.function.scalar.convert.ToAggregateMetricDouble;
 import org.elasticsearch.xpack.esql.expression.function.scalar.convert.ToBase64;
 import org.elasticsearch.xpack.esql.expression.function.scalar.convert.ToBoolean;
 import org.elasticsearch.xpack.esql.expression.function.scalar.convert.ToCartesianPoint;
@@ -180,6 +181,7 @@ public class ExpressionWritables {
         entries.add(StY.ENTRY);
         entries.add(Tan.ENTRY);
         entries.add(Tanh.ENTRY);
+        entries.add(ToAggregateMetricDouble.ENTRY);
         entries.add(ToBase64.ENTRY);
         entries.add(ToBoolean.ENTRY);
         entries.add(ToCartesianPoint.ENTRY);

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/expression/function/EsqlFunctionRegistry.java

@@ -42,6 +42,7 @@ import org.elasticsearch.xpack.esql.expression.function.scalar.conditional.Case;
 import org.elasticsearch.xpack.esql.expression.function.scalar.conditional.Greatest;
 import org.elasticsearch.xpack.esql.expression.function.scalar.conditional.Least;
 import org.elasticsearch.xpack.esql.expression.function.scalar.convert.FromBase64;
+import org.elasticsearch.xpack.esql.expression.function.scalar.convert.ToAggregateMetricDouble;
 import org.elasticsearch.xpack.esql.expression.function.scalar.convert.ToBase64;
 import org.elasticsearch.xpack.esql.expression.function.scalar.convert.ToBoolean;
 import org.elasticsearch.xpack.esql.expression.function.scalar.convert.ToCartesianPoint;
@@ -376,6 +377,7 @@ public class EsqlFunctionRegistry {
             // conversion functions
             new FunctionDefinition[] {
                 def(FromBase64.class, FromBase64::new, "from_base64"),
+                def(ToAggregateMetricDouble.class, ToAggregateMetricDouble::new, "to_aggregate_metric_double", "to_aggregatemetricdouble"),
                 def(ToBase64.class, ToBase64::new, "to_base64"),
                 def(ToBoolean.class, ToBoolean::new, "to_boolean", "to_bool"),
                 def(ToCartesianPoint.class, ToCartesianPoint::new, "to_cartesianpoint"),

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/expression/function/scalar/convert/ToAggregateMetricDouble.java

@@ -0,0 +1,563 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+package org.elasticsearch.xpack.esql.expression.function.scalar.convert;
+
+import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
+import org.elasticsearch.common.io.stream.StreamInput;
+import org.elasticsearch.compute.data.AggregateMetricDoubleBlockBuilder;
+import org.elasticsearch.compute.data.Block;
+import org.elasticsearch.compute.data.BlockFactory;
+import org.elasticsearch.compute.data.CompositeBlock;
+import org.elasticsearch.compute.data.DoubleBlock;
+import org.elasticsearch.compute.data.DoubleVector;
+import org.elasticsearch.compute.data.IntBlock;
+import org.elasticsearch.compute.data.IntVector;
+import org.elasticsearch.compute.data.LongBlock;
+import org.elasticsearch.compute.data.LongVector;
+import org.elasticsearch.compute.data.Page;
+import org.elasticsearch.compute.data.Vector;
+import org.elasticsearch.compute.operator.DriverContext;
+import org.elasticsearch.compute.operator.EvalOperator;
+import org.elasticsearch.core.Releasable;
+import org.elasticsearch.core.Releasables;
+import org.elasticsearch.search.aggregations.metrics.CompensatedSum;
+import org.elasticsearch.xpack.esql.core.expression.Expression;
+import org.elasticsearch.xpack.esql.core.tree.NodeInfo;
+import org.elasticsearch.xpack.esql.core.tree.Source;
+import org.elasticsearch.xpack.esql.core.type.DataType;
+import org.elasticsearch.xpack.esql.expression.function.FunctionInfo;
+import org.elasticsearch.xpack.esql.expression.function.Param;
+import org.elasticsearch.xpack.esql.type.EsqlDataTypeConverter;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+
+import static org.elasticsearch.xpack.esql.core.expression.TypeResolutions.ParamOrdinal.DEFAULT;
+import static org.elasticsearch.xpack.esql.core.expression.TypeResolutions.isType;
+import static org.elasticsearch.xpack.esql.core.type.DataType.AGGREGATE_METRIC_DOUBLE;
+import static org.elasticsearch.xpack.esql.core.type.DataType.DOUBLE;
+import static org.elasticsearch.xpack.esql.core.type.DataType.INTEGER;
+import static org.elasticsearch.xpack.esql.core.type.DataType.LONG;
+import static org.elasticsearch.xpack.esql.core.type.DataType.UNSIGNED_LONG;
+
+public class ToAggregateMetricDouble extends AbstractConvertFunction {
+
+    private static final Map<DataType, AbstractConvertFunction.BuildFactory> EVALUATORS = Map.ofEntries(
+        Map.entry(AGGREGATE_METRIC_DOUBLE, (source, fieldEval) -> fieldEval),
+        Map.entry(DOUBLE, DoubleFactory::new),
+        Map.entry(INTEGER, IntFactory::new),
+        Map.entry(LONG, LongFactory::new),
+        Map.entry(UNSIGNED_LONG, UnsignedLongFactory::new)
+    );
+
+    public static final NamedWriteableRegistry.Entry ENTRY = new NamedWriteableRegistry.Entry(
+        Expression.class,
+        "ToAggregateMetricDouble",
+        ToAggregateMetricDouble::new
+    );
+
+    @FunctionInfo(returnType = "aggregate_metric_double", description = "Encode a numeric to an aggregate_metric_double.")
+    public ToAggregateMetricDouble(
+        Source source,
+        @Param(
+            name = "number",
+            type = { "double", "long", "unsigned_long", "integer", "aggregate_metric_double" },
+            description = "Input value. The input can be a single-valued column or an expression."
+        ) Expression field
+    ) {
+        super(source, field);
+    }
+
+    private ToAggregateMetricDouble(StreamInput in) throws IOException {
+        super(in);
+    }
+
+    @Override
+    public String getWriteableName() {
+        return ENTRY.name;
+    }
+
+    @Override
+    protected TypeResolution resolveType() {
+        if (childrenResolved() == false) {
+            return new TypeResolution("Unresolved children");
+        }
+        return isType(
+            field,
+            dt -> dt == DataType.AGGREGATE_METRIC_DOUBLE || dt == DataType.DOUBLE || dt == LONG || dt == INTEGER || dt == UNSIGNED_LONG,
+            sourceText(),
+            DEFAULT,
+            "numeric or aggregate_metric_double"
+        );
+    }
+
+    @Override
+    public DataType dataType() {
+        return AGGREGATE_METRIC_DOUBLE;
+    }
+
+    @Override
+    public Expression replaceChildren(List<Expression> newChildren) {
+        return new ToAggregateMetricDouble(source(), newChildren.get(0));
+    }
+
+    @Override
+    protected NodeInfo<? extends Expression> info() {
+        return NodeInfo.create(this, ToAggregateMetricDouble::new, field);
+    }
+
+    @Override
+    protected Map<DataType, AbstractConvertFunction.BuildFactory> factories() {
+        return EVALUATORS;
+    }
+
+    private static class AggregateMetricDoubleVectorBuilder implements Releasable {
+        private final DoubleVector.FixedBuilder valuesBuilder;
+        private final BlockFactory blockFactory;
+
+        private AggregateMetricDoubleVectorBuilder(int estimatedSize, BlockFactory blockFactory) {
+            this.blockFactory = blockFactory;
+            this.valuesBuilder = blockFactory.newDoubleVectorFixedBuilder(estimatedSize);
+        }
+
+        private void appendValue(double value) {
+            valuesBuilder.appendDouble(value);
+        }
+
+        private Block build() {
+            Block[] blocks = new Block[4];
+            Block block;
+            boolean success = false;
+            try {
+                block = valuesBuilder.build().asBlock();
+                blocks[AggregateMetricDoubleBlockBuilder.Metric.MIN.getIndex()] = block;
+                blocks[AggregateMetricDoubleBlockBuilder.Metric.MAX.getIndex()] = block;
+                block.incRef();
+                blocks[AggregateMetricDoubleBlockBuilder.Metric.SUM.getIndex()] = block;
+                block.incRef();
+                blocks[AggregateMetricDoubleBlockBuilder.Metric.COUNT.getIndex()] = blockFactory.newConstantIntBlockWith(
+                    1,
+                    block.getPositionCount()
+                );
+                CompositeBlock compositeBlock = new CompositeBlock(blocks);
+                success = true;
+                return compositeBlock;
+            } finally {
+                if (success == false) {
+                    Releasables.closeExpectNoException(blocks);
+                }
+            }
+        }
+
+        @Override
+        public void close() {
+            Releasables.closeExpectNoException(valuesBuilder);
+        }
+    }
+
+    public static class DoubleFactory implements EvalOperator.ExpressionEvaluator.Factory {
+        private final Source source;
+
+        private final EvalOperator.ExpressionEvaluator.Factory fieldEvaluator;
+
+        public DoubleFactory(Source source, EvalOperator.ExpressionEvaluator.Factory fieldEvaluator) {
+            this.fieldEvaluator = fieldEvaluator;
+            this.source = source;
+        }
+
+        @Override
+        public String toString() {
+            return "ToAggregateMetricDoubleFromDoubleEvaluator[" + "field=" + fieldEvaluator + "]";
+        }
+
+        @Override
+        public EvalOperator.ExpressionEvaluator get(DriverContext context) {
+            final EvalOperator.ExpressionEvaluator eval = fieldEvaluator.get(context);
+
+            return new EvalOperator.ExpressionEvaluator() {
+                private Block evalBlock(Block block) {
+                    int positionCount = block.getPositionCount();
+                    DoubleBlock doubleBlock = (DoubleBlock) block;
+                    try (
+                        AggregateMetricDoubleBlockBuilder builder = context.blockFactory()
+                            .newAggregateMetricDoubleBlockBuilder(positionCount)
+                    ) {
+                        CompensatedSum compensatedSum = new CompensatedSum();
+                        for (int p = 0; p < positionCount; p++) {
+                            int valueCount = doubleBlock.getValueCount(p);
+                            if (valueCount == 0) {
+                                builder.appendNull();
+                                continue;
+                            }
+                            int start = doubleBlock.getFirstValueIndex(p);
+                            int end = start + valueCount;
+                            if (valueCount == 1) {
+                                double current = doubleBlock.getDouble(start);
+                                builder.min().appendDouble(current);
+                                builder.max().appendDouble(current);
+                                builder.sum().appendDouble(current);
+                                builder.count().appendInt(valueCount);
+                                continue;
+                            }
+                            double min = Double.POSITIVE_INFINITY;
+                            double max = Double.NEGATIVE_INFINITY;
+                            for (int i = start; i < end; i++) {
+                                double current = doubleBlock.getDouble(i);
+                                min = Math.min(min, current);
+                                max = Math.max(max, current);
+                                compensatedSum.add(current);
+                            }
+                            builder.min().appendDouble(min);
+                            builder.max().appendDouble(max);
+                            builder.sum().appendDouble(compensatedSum.value());
+                            builder.count().appendInt(valueCount);
+                            compensatedSum.reset(0, 0);
+                        }
+                        return builder.build();
+                    }
+                }
+
+                private Block evalVector(Vector vector) {
+                    int positionCount = vector.getPositionCount();
+                    DoubleVector doubleVector = (DoubleVector) vector;
+                    try (
+                        AggregateMetricDoubleVectorBuilder builder = new AggregateMetricDoubleVectorBuilder(
+                            positionCount,
+                            context.blockFactory()
+                        )
+                    ) {
+                        for (int p = 0; p < positionCount; p++) {
+                            double value = doubleVector.getDouble(p);
+                            builder.appendValue(value);
+                        }
+                        return builder.build();
+                    }
+                }
+
+                @Override
+                public Block eval(Page page) {
+                    try (Block block = eval.eval(page)) {
+                        Vector vector = block.asVector();
+                        return vector == null ? evalBlock(block) : evalVector(vector);
+                    }
+                }
+
+                @Override
+                public void close() {
+                    Releasables.closeExpectNoException(eval);
+                }
+
+                @Override
+                public String toString() {
+                    return "ToAggregateMetricDoubleFromDoubleEvaluator[field=" + eval + "]";
+                }
+            };
+        }
+    }
+
+    public static class IntFactory implements EvalOperator.ExpressionEvaluator.Factory {
+        private final Source source;
+
+        private final EvalOperator.ExpressionEvaluator.Factory fieldEvaluator;
+
+        public IntFactory(Source source, EvalOperator.ExpressionEvaluator.Factory fieldEvaluator) {
+            this.fieldEvaluator = fieldEvaluator;
+            this.source = source;
+        }
+
+        @Override
+        public String toString() {
+            return "ToAggregateMetricDoubleFromIntEvaluator[" + "field=" + fieldEvaluator + "]";
+        }
+
+        @Override
+        public EvalOperator.ExpressionEvaluator get(DriverContext context) {
+            final EvalOperator.ExpressionEvaluator eval = fieldEvaluator.get(context);
+
+            return new EvalOperator.ExpressionEvaluator() {
+                @Override
+                public Block eval(Page page) {
+                    try (Block block = eval.eval(page)) {
+                        Vector vector = block.asVector();
+                        return vector == null ? evalBlock(block) : evalVector(vector);
+                    }
+                }
+
+                private Block evalBlock(Block block) {
+                    int positionCount = block.getPositionCount();
+                    IntBlock intBlock = (IntBlock) block;
+                    try (
+                        AggregateMetricDoubleBlockBuilder builder = context.blockFactory()
+                            .newAggregateMetricDoubleBlockBuilder(positionCount)
+                    ) {
+                        CompensatedSum sum = new CompensatedSum();
+                        for (int p = 0; p < positionCount; p++) {
+                            int valueCount = intBlock.getValueCount(p);
+                            int start = intBlock.getFirstValueIndex(p);
+                            int end = start + valueCount;
+                            if (valueCount == 0) {
+                                builder.appendNull();
+                                continue;
+                            }
+                            if (valueCount == 1) {
+                                double current = intBlock.getInt(start);
+                                builder.min().appendDouble(current);
+                                builder.max().appendDouble(current);
+                                builder.sum().appendDouble(current);
+                                builder.count().appendInt(valueCount);
+                                continue;
+                            }
+                            double min = Double.POSITIVE_INFINITY;
+                            double max = Double.NEGATIVE_INFINITY;
+                            for (int i = start; i < end; i++) {
+                                double current = intBlock.getInt(i);
+                                min = Math.min(min, current);
+                                max = Math.max(max, current);
+                                sum.add(current);
+                            }
+                            builder.min().appendDouble(min);
+                            builder.max().appendDouble(max);
+                            builder.sum().appendDouble(sum.value());
+                            builder.count().appendInt(valueCount);
+                            sum.reset(0, 0);
+                        }
+                        return builder.build();
+                    }
+                }
+
+                private Block evalVector(Vector vector) {
+                    int positionCount = vector.getPositionCount();
+                    IntVector intVector = (IntVector) vector;
+                    try (
+                        AggregateMetricDoubleVectorBuilder builder = new AggregateMetricDoubleVectorBuilder(
+                            positionCount,
+                            context.blockFactory()
+                        )
+                    ) {
+                        for (int p = 0; p < positionCount; p++) {
+                            double value = intVector.getInt(p);
+                            builder.appendValue(value);
+                        }
+                        return builder.build();
+                    }
+                }
+
+                @Override
+                public void close() {
+                    Releasables.closeExpectNoException(eval);
+                }
+
+                @Override
+                public String toString() {
+                    return "ToAggregateMetricDoubleFromIntEvaluator[field=" + eval + "]";
+                }
+            };
+        }
+    }
+
+    public static class LongFactory implements EvalOperator.ExpressionEvaluator.Factory {
+        private final Source source;
+
+        private final EvalOperator.ExpressionEvaluator.Factory fieldEvaluator;
+
+        public LongFactory(Source source, EvalOperator.ExpressionEvaluator.Factory fieldEvaluator) {
+            this.fieldEvaluator = fieldEvaluator;
+            this.source = source;
+        }
+
+        @Override
+        public String toString() {
+            return "ToAggregateMetricDoubleFromLongEvaluator[" + "field=" + fieldEvaluator + "]";
+        }
+
+        @Override
+        public EvalOperator.ExpressionEvaluator get(DriverContext context) {
+            final EvalOperator.ExpressionEvaluator eval = fieldEvaluator.get(context);
+
+            return new EvalOperator.ExpressionEvaluator() {
+                private Block evalBlock(Block block) {
+                    int positionCount = block.getPositionCount();
+                    LongBlock longBlock = (LongBlock) block;
+                    try (
+                        AggregateMetricDoubleBlockBuilder builder = context.blockFactory()
+                            .newAggregateMetricDoubleBlockBuilder(positionCount)
+                    ) {
+                        CompensatedSum sum = new CompensatedSum();
+                        for (int p = 0; p < positionCount; p++) {
+                            int valueCount = longBlock.getValueCount(p);
+                            int start = longBlock.getFirstValueIndex(p);
+                            int end = start + valueCount;
+                            if (valueCount == 0) {
+                                builder.appendNull();
+                                continue;
+                            }
+                            if (valueCount == 1) {
+                                double current = longBlock.getLong(start);
+                                builder.min().appendDouble(current);
+                                builder.max().appendDouble(current);
+                                builder.sum().appendDouble(current);
+                                builder.count().appendInt(valueCount);
+                                continue;
+                            }
+                            double min = Double.POSITIVE_INFINITY;
+                            double max = Double.NEGATIVE_INFINITY;
+                            for (int i = start; i < end; i++) {
+                                double current = longBlock.getLong(i);
+                                min = Math.min(min, current);
+                                max = Math.max(max, current);
+                                sum.add(current);
+                            }
+                            builder.min().appendDouble(min);
+                            builder.max().appendDouble(max);
+                            builder.sum().appendDouble(sum.value());
+                            builder.count().appendInt(valueCount);
+                            sum.reset(0, 0);
+                        }
+                        return builder.build();
+                    }
+                }
+
+                private Block evalVector(Vector vector) {
+                    int positionCount = vector.getPositionCount();
+                    LongVector longVector = (LongVector) vector;
+                    try (
+                        AggregateMetricDoubleVectorBuilder builder = new AggregateMetricDoubleVectorBuilder(
+                            positionCount,
+                            context.blockFactory()
+                        )
+                    ) {
+                        for (int p = 0; p < positionCount; p++) {
+                            double value = longVector.getLong(p);
+                            builder.appendValue(value);
+                        }
+                        return builder.build();
+                    }
+                }
+
+                @Override
+                public Block eval(Page page) {
+                    try (Block block = eval.eval(page)) {
+                        Vector vector = block.asVector();
+                        return vector == null ? evalBlock(block) : evalVector(vector);
+                    }
+                }
+
+                @Override
+                public void close() {
+                    Releasables.closeExpectNoException(eval);
+                }
+
+                @Override
+                public String toString() {
+                    return "ToAggregateMetricDoubleFromLongEvaluator[field=" + eval + "]";
+                }
+            };
+        }
+    }
+
+    public static class UnsignedLongFactory implements EvalOperator.ExpressionEvaluator.Factory {
+        private final Source source;
+
+        private final EvalOperator.ExpressionEvaluator.Factory fieldEvaluator;
+
+        public UnsignedLongFactory(Source source, EvalOperator.ExpressionEvaluator.Factory fieldEvaluator) {
+            this.fieldEvaluator = fieldEvaluator;
+            this.source = source;
+        }
+
+        @Override
+        public String toString() {
+            return "ToAggregateMetricDoubleFromUnsignedLongEvaluator[" + "field=" + fieldEvaluator + "]";
+        }
+
+        @Override
+        public EvalOperator.ExpressionEvaluator get(DriverContext context) {
+            final EvalOperator.ExpressionEvaluator eval = fieldEvaluator.get(context);
+
+            return new EvalOperator.ExpressionEvaluator() {
+                private Block evalBlock(Block block) {
+                    int positionCount = block.getPositionCount();
+                    LongBlock longBlock = (LongBlock) block;
+                    try (
+                        AggregateMetricDoubleBlockBuilder builder = context.blockFactory()
+                            .newAggregateMetricDoubleBlockBuilder(positionCount)
+                    ) {
+                        CompensatedSum sum = new CompensatedSum();
+                        for (int p = 0; p < positionCount; p++) {
+                            int valueCount = longBlock.getValueCount(p);
+                            int start = longBlock.getFirstValueIndex(p);
+                            int end = start + valueCount;
+                            if (valueCount == 0) {
+                                builder.appendNull();
+                                continue;
+                            }
+                            if (valueCount == 1) {
+                                double current = EsqlDataTypeConverter.unsignedLongToDouble(longBlock.getLong(p));
+                                builder.min().appendDouble(current);
+                                builder.max().appendDouble(current);
+                                builder.sum().appendDouble(current);
+                                builder.count().appendInt(valueCount);
+                                continue;
+                            }
+                            double min = Double.POSITIVE_INFINITY;
+                            double max = Double.NEGATIVE_INFINITY;
+                            for (int i = start; i < end; i++) {
+                                double current = EsqlDataTypeConverter.unsignedLongToDouble(longBlock.getLong(p));
+                                min = Math.min(min, current);
+                                max = Math.max(max, current);
+                                sum.add(current);
+                            }
+                            builder.min().appendDouble(min);
+                            builder.max().appendDouble(max);
+                            builder.sum().appendDouble(sum.value());
+                            builder.count().appendInt(valueCount);
+                            sum.reset(0, 0);
+                        }
+                        return builder.build();
+                    }
+                }
+
+                private Block evalVector(Vector vector) {
+                    int positionCount = vector.getPositionCount();
+                    LongVector longVector = (LongVector) vector;
+                    try (
+                        AggregateMetricDoubleVectorBuilder builder = new AggregateMetricDoubleVectorBuilder(
+                            positionCount,
+                            context.blockFactory()
+                        )
+                    ) {
+                        for (int p = 0; p < positionCount; p++) {
+                            double value = EsqlDataTypeConverter.unsignedLongToDouble(longVector.getLong(p));
+                            builder.appendValue(value);
+                        }
+                        return builder.build();
+                    }
+                }
+
+                @Override
+                public Block eval(Page page) {
+                    try (Block block = eval.eval(page)) {
+                        Vector vector = block.asVector();
+                        return vector == null ? evalBlock(block) : evalVector(vector);
+                    }
+                }
+
+                @Override
+                public void close() {
+                    Releasables.closeExpectNoException(eval);
+                }
+
+                @Override
+                public String toString() {
+                    return "ToAggregateMetricDoubleFromUnsignedLongEvaluator[field=" + eval + "]";
+                }
+            };
+        }
+    }
+}

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/SerializationTestUtils.java

@@ -10,9 +10,11 @@ package org.elasticsearch.xpack.esql;
 import org.elasticsearch.common.bytes.BytesReference;
 import org.elasticsearch.common.io.stream.ByteBufferStreamInput;
 import org.elasticsearch.common.io.stream.BytesStreamOutput;
+import org.elasticsearch.common.io.stream.GenericNamedWriteable;
 import org.elasticsearch.common.io.stream.NamedWriteableAwareStreamInput;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.io.stream.StreamInput;
+import org.elasticsearch.compute.data.AggregateMetricDoubleBlockBuilder;
 import org.elasticsearch.index.query.BoolQueryBuilder;
 import org.elasticsearch.index.query.ExistsQueryBuilder;
 import org.elasticsearch.index.query.MatchAllQueryBuilder;
@@ -112,6 +114,13 @@ public class SerializationTestUtils {
         entries.add(SingleValueQuery.ENTRY);
         entries.addAll(ExpressionWritables.getNamedWriteables());
         entries.addAll(PlanWritables.getNamedWriteables());
+        entries.add(
+            new NamedWriteableRegistry.Entry(
+                GenericNamedWriteable.class,
+                AggregateMetricDoubleBlockBuilder.AggregateMetricDoubleLiteral.ENTRY.name,
+                AggregateMetricDoubleBlockBuilder.AggregateMetricDoubleLiteral::new
+            )
+        );
         return new NamedWriteableRegistry(entries);
     }
 }

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/expression/function/scalar/convert/ToAggregateMetricDoubleTests.java

@@ -0,0 +1,91 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+package org.elasticsearch.xpack.esql.expression.function.scalar.convert;
+
+import com.carrotsearch.randomizedtesting.annotations.Name;
+import com.carrotsearch.randomizedtesting.annotations.ParametersFactory;
+
+import org.elasticsearch.compute.data.AggregateMetricDoubleBlockBuilder;
+import org.elasticsearch.xpack.esql.core.expression.Expression;
+import org.elasticsearch.xpack.esql.core.tree.Source;
+import org.elasticsearch.xpack.esql.core.type.DataType;
+import org.elasticsearch.xpack.esql.expression.function.AbstractScalarFunctionTestCase;
+import org.elasticsearch.xpack.esql.expression.function.FunctionName;
+import org.elasticsearch.xpack.esql.expression.function.TestCaseSupplier;
+
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Supplier;
+
+import static java.util.Collections.emptyList;
+
+@FunctionName("to_aggregate_metric_double")
+public class ToAggregateMetricDoubleTests extends AbstractScalarFunctionTestCase {
+    public ToAggregateMetricDoubleTests(@Name("TestCase") Supplier<TestCaseSupplier.TestCase> testCaseSupplier) {
+        this.testCase = testCaseSupplier.get();
+    }
+
+    @Override
+    protected Expression build(Source source, List<Expression> args) {
+        if (args.get(0).dataType() == DataType.AGGREGATE_METRIC_DOUBLE) {
+            assumeTrue("Test sometimes wraps literals as fields", args.get(0).foldable());
+        }
+        return new ToAggregateMetricDouble(source, args.get(0));
+    }
+
+    @ParametersFactory
+    public static Iterable<Object[]> parameters() {
+        final String evaluatorStringLeft = "ToAggregateMetricDoubleFrom";
+        final String evaluatorStringRight = "Evaluator[field=Attribute[channel=0]]";
+        final List<TestCaseSupplier> suppliers = new ArrayList<>();
+
+        TestCaseSupplier.forUnaryInt(
+            suppliers,
+            evaluatorStringLeft + "Int" + evaluatorStringRight,
+            DataType.AGGREGATE_METRIC_DOUBLE,
+            i -> new AggregateMetricDoubleBlockBuilder.AggregateMetricDoubleLiteral((double) i, (double) i, (double) i, 1),
+            Integer.MIN_VALUE,
+            Integer.MAX_VALUE,
+            emptyList()
+        );
+        TestCaseSupplier.forUnaryLong(
+            suppliers,
+            evaluatorStringLeft + "Long" + evaluatorStringRight,
+            DataType.AGGREGATE_METRIC_DOUBLE,
+            l -> new AggregateMetricDoubleBlockBuilder.AggregateMetricDoubleLiteral((double) l, (double) l, (double) l, 1),
+            Long.MIN_VALUE,
+            Long.MAX_VALUE,
+            emptyList()
+        );
+        TestCaseSupplier.forUnaryUnsignedLong(
+            suppliers,
+            evaluatorStringLeft + "UnsignedLong" + evaluatorStringRight,
+            DataType.AGGREGATE_METRIC_DOUBLE,
+            ul -> {
+                var newVal = ul.doubleValue();
+                return new AggregateMetricDoubleBlockBuilder.AggregateMetricDoubleLiteral(newVal, newVal, newVal, 1);
+            },
+            BigInteger.ZERO,
+            UNSIGNED_LONG_MAX,
+            emptyList()
+        );
+        TestCaseSupplier.forUnaryDouble(
+            suppliers,
+            evaluatorStringLeft + "Double" + evaluatorStringRight,
+            DataType.AGGREGATE_METRIC_DOUBLE,
+            d -> new AggregateMetricDoubleBlockBuilder.AggregateMetricDoubleLiteral(d, d, d, 1),
+            Double.NEGATIVE_INFINITY,
+            Double.POSITIVE_INFINITY,
+            emptyList()
+        );
+
+        return parameterSuppliersFromTypedDataWithDefaultChecksNoErrors(true, suppliers);
+    }
+
+}

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/plan/physical/AbstractPhysicalPlanSerializationTests.java

@@ -9,6 +9,7 @@ package org.elasticsearch.xpack.esql.plan.physical;
 
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.compute.data.AggregateMetricDoubleBlockBuilder;
 import org.elasticsearch.search.SearchModule;
 import org.elasticsearch.xpack.esql.core.tree.Node;
 import org.elasticsearch.xpack.esql.expression.ExpressionWritables;
@@ -51,6 +52,7 @@ public abstract class AbstractPhysicalPlanSerializationTests<T extends PhysicalP
         entries.addAll(ExpressionWritables.allExpressions());
         entries.addAll(new SearchModule(Settings.EMPTY, List.of()).getNamedWriteables()); // Query builders
         entries.add(Add.ENTRY); // Used by the eval tests
+        entries.add(AggregateMetricDoubleBlockBuilder.AggregateMetricDoubleLiteral.ENTRY);
         return new NamedWriteableRegistry(entries);
     }
 

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/esql/40_tsdb.yml

@@ -609,3 +609,53 @@ _source:
               rx: 530600088
               tx: 1434577921
             uid: df3145b3-0563-4d3b-a0f7-897eb2876ea9
+
+---
+to_aggregate_metric_double with multi_values:
+  - requires:
+      test_runner_features: [ capabilities ]
+      capabilities:
+        - method: POST
+          path: /_query
+          parameters: [ ]
+          capabilities: [ aggregate_metric_double_convert_to ]
+      reason: "Support for to_aggregate_metric_double function"
+
+  - do:
+      indices.create:
+        index: convert_test
+        body:
+          mappings:
+            properties:
+              "some_long_field":
+                type: long
+              "some_double_field":
+                type: double
+              "some_int_field":
+                type: integer
+              "some_unsigned_long_field":
+                type: unsigned_long
+  - do:
+      bulk:
+        refresh: true
+        index: new_test
+        body:
+          - {"index": {}}
+          - {"some_long_field": [20385, 182941, -10958], "some_double_field": [195.1, 102.444], "some_int_field": [64, 121, 498, 1456], "some_unsigned_long_field": [13985, 19418924, 123]}
+  - do:
+      esql.query:
+        body:
+          query: 'FROM new_test | EVAL from_long=TO_AGGREGATE_METRIC_DOUBLE(some_long_field), from_double=TO_AGGREGATE_METRIC_DOUBLE(some_double_field), from_int=TO_AGGREGATE_METRIC_DOUBLE(some_int_field), from_ulong=TO_AGGREGATE_METRIC_DOUBLE(some_unsigned_long_field) | KEEP from_long, from_double, from_int, from_ulong | LIMIT 1'
+
+  - match: {columns.0.name: "from_long"}
+  - match: {columns.0.type: "aggregate_metric_double"}
+  - match: {columns.1.name: "from_double"}
+  - match: {columns.1.type: "aggregate_metric_double"}
+  - match: {columns.2.name: "from_int"}
+  - match: {columns.2.type: "aggregate_metric_double"}
+  - match: {columns.3.name: "from_ulong"}
+  - match: {columns.3.type: "aggregate_metric_double"}
+  - match: {values.0.0: '{"min":-10958.0,"max":182941.0,"sum":192368.0,"value_count":3}'}
+  - match: {values.0.1: '{"min":102.44400024414062,"max":195.10000610351562,"sum":297.54400634765625,"value_count":2}'}
+  - match: {values.0.2: '{"min":64.0,"max":1456.0,"sum":2139.0,"value_count":4}'}
+  - match: {values.0.3: '{"min":123.0,"max":1.9418924E7,"sum":1.9433032E7,"value_count":3}'}

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/esql/46_downsample.yml

@@ -146,3 +146,108 @@ setup:
   - match: {columns.0.name: "k8s.pod.network.rx"}
   - match: {columns.0.type: "aggregate_metric_double"}
   - match: {values.0.0: '{"min":530604.0,"max":530605.0,"sum":1061209.0,"value_count":2}'}
+
+---
+"Stats from downsampled and non-downsampled index simultaneously":
+  - requires:
+      test_runner_features: [capabilities]
+      capabilities:
+        - method: POST
+          path: /_query
+          parameters: []
+          capabilities: [aggregate_metric_double_convert_to]
+      reason: "Support for to_aggregate_metric_double function"
+
+  - do:
+      indices.downsample:
+        index: test
+        target_index: test-downsample
+        body: >
+          {
+            "fixed_interval": "1h"
+          }
+  - is_true: acknowledged
+
+  - do:
+      indices.create:
+        index: test-2
+        body:
+          settings:
+            number_of_shards: 1
+            index:
+              mode: time_series
+              routing_path: [ metricset, k8s.pod.uid ]
+              time_series:
+                start_time: 2021-04-29T00:00:00Z
+                end_time: 2021-04-30T00:00:00Z
+          mappings:
+            properties:
+              "@timestamp":
+                type: date
+              metricset:
+                type: keyword
+                time_series_dimension: true
+              k8s:
+                properties:
+                  pod:
+                    properties:
+                      uid:
+                        type: keyword
+                        time_series_dimension: true
+                      name:
+                        type: keyword
+                      created_at:
+                        type: date_nanos
+                      running:
+                        type: boolean
+                      number_of_containers:
+                        type: integer
+                      ip:
+                        type: ip
+                      tags:
+                        type: keyword
+                      values:
+                        type: integer
+                      network:
+                        properties:
+                          tx:
+                            type: long
+                            time_series_metric: gauge
+                          rx:
+                            type: long
+                            time_series_metric: gauge
+
+  - do:
+      bulk:
+        refresh: true
+        index: test-2
+        body:
+          - '{"index": {}}'
+          - '{"@timestamp": "2021-04-29T21:50:04.467Z", "metricset": "pod", "k8s": {"pod": {"name": "cat", "uid":"947e4ced-1786-4e53-9e0c-5c447e959507", "ip": "10.10.55.1", "network": {"tx": 2001810, "rx": 802339}, "created_at": "2021-04-28T19:34:00.000Z", "running": false, "number_of_containers": 2, "tags": ["backend", "prod"], "values": [2, 3, 6]}}}'
+          - '{"index": {}}'
+          - '{"@timestamp": "2021-04-29T21:50:24.467Z", "metricset": "pod", "k8s": {"pod": {"name": "cat", "uid":"947e4ced-1786-4e53-9e0c-5c447e959507", "ip": "10.10.55.26", "network": {"tx": 2000177, "rx": 800479}, "created_at": "2021-04-28T19:35:00.000Z", "running": true, "number_of_containers": 2, "tags": ["backend", "prod", "us-west1"], "values": [1, 1, 3]}}}'
+          - '{"index": {}}'
+
+  - do:
+      esql.query:
+        body:
+          query: "FROM test-* |
+          WHERE k8s.pod.uid == \"947e4ced-1786-4e53-9e0c-5c447e959507\" |
+          EVAL rx = to_aggregate_metric_double(k8s.pod.network.rx) |
+          STATS max(rx), min(rx), sum(rx), count(rx) |
+          LIMIT 100"
+
+  - length: {values: 1}
+  - length: {values.0: 4}
+  - match: {columns.0.name: "max(rx)"}
+  - match: {columns.0.type: "double"}
+  - match: {columns.1.name: "min(rx)"}
+  - match: {columns.1.type: "double"}
+  - match: {columns.2.name: "sum(rx)"}
+  - match: {columns.2.type: "double"}
+  - match: {columns.3.name: "count(rx)"}
+  - match: {columns.3.type: "long"}
+  - match: {values.0.0: 803685.0}
+  - match: {values.0.1: 800479.0}
+  - match: {values.0.2: 4812452.0}
+  - match: {values.0.3: 6}

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/esql/60_usage.yml

@@ -93,7 +93,7 @@ setup:
   - gt: {esql.functions.to_long: $functions_to_long}
   - match: {esql.functions.coalesce: $functions_coalesce}
   # Testing for the entire function set isn't feasbile, so we just check that we return the correct count as an approximation.
-  - length: {esql.functions: 133} # check the "sister" test below for a likely update to the same esql.functions length check
+  - length: {esql.functions: 134} # check the "sister" test below for a likely update to the same esql.functions length check
 
 ---
 "Basic ESQL usage output (telemetry) non-snapshot version":
@@ -164,4 +164,4 @@ setup:
   - match: {esql.functions.cos: $functions_cos}
   - gt: {esql.functions.to_long: $functions_to_long}
   - match: {esql.functions.coalesce: $functions_coalesce}
-  - length: {esql.functions: 130} # check the "sister" test above for a likely update to the same esql.functions length check
+  - length: {esql.functions: 131} # check the "sister" test above for a likely update to the same esql.functions length check