move/hide random

Author: jan-elastic

x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/random/RandomEvaluator.java renamed to x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/approximate/RandomEvaluator.java

@@ -32,11 +32,11 @@
 import org.elasticsearch.xpack.esql.expression.function.aggregate.WeightedAvg;
 import org.elasticsearch.xpack.esql.expression.function.scalar.EsqlScalarFunction;
 import org.elasticsearch.xpack.esql.expression.function.scalar.approximate.ConfidenceInterval;
+import org.elasticsearch.xpack.esql.expression.function.scalar.approximate.Random;
 import org.elasticsearch.xpack.esql.expression.function.scalar.approximate.Reliable;
 import org.elasticsearch.xpack.esql.expression.function.scalar.convert.ToLong;
 import org.elasticsearch.xpack.esql.expression.function.scalar.multivalue.MvAppend;
 import org.elasticsearch.xpack.esql.expression.function.scalar.multivalue.MvSlice;
-import org.elasticsearch.xpack.esql.expression.function.scalar.random.Random;
 import org.elasticsearch.xpack.esql.expression.predicate.logical.And;
 import org.elasticsearch.xpack.esql.expression.predicate.nulls.IsNotNull;
 import org.elasticsearch.xpack.esql.expression.predicate.operator.arithmetic.Div;

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/approximate/Approximate.java

@@ -15,6 +15,7 @@
 import org.elasticsearch.xpack.esql.expression.function.aggregate.AggregateWritables;
 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.approximate.Random;
 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;
@@ -62,7 +63,6 @@
 import org.elasticsearch.xpack.esql.expression.function.scalar.math.Tan;
 import org.elasticsearch.xpack.esql.expression.function.scalar.math.Tanh;
 import org.elasticsearch.xpack.esql.expression.function.scalar.multivalue.MvFunctionWritables;
-import org.elasticsearch.xpack.esql.expression.function.scalar.random.Random;
 import org.elasticsearch.xpack.esql.expression.function.scalar.spatial.SpatialContains;
 import org.elasticsearch.xpack.esql.expression.function.scalar.spatial.SpatialDisjoint;
 import org.elasticsearch.xpack.esql.expression.function.scalar.spatial.SpatialIntersects;

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

@@ -158,7 +158,6 @@
 import org.elasticsearch.xpack.esql.expression.function.scalar.multivalue.MvSum;
 import org.elasticsearch.xpack.esql.expression.function.scalar.multivalue.MvZip;
 import org.elasticsearch.xpack.esql.expression.function.scalar.nulls.Coalesce;
-import org.elasticsearch.xpack.esql.expression.function.scalar.random.Random;
 import org.elasticsearch.xpack.esql.expression.function.scalar.score.Decay;
 import org.elasticsearch.xpack.esql.expression.function.scalar.spatial.SpatialContains;
 import org.elasticsearch.xpack.esql.expression.function.scalar.spatial.SpatialDisjoint;
@@ -535,9 +534,7 @@ private static FunctionDefinition[][] functions() {
                 def(LastOverTime.class, uni(LastOverTime::new), "last_over_time"),
                 def(FirstOverTime.class, uni(FirstOverTime::new), "first_over_time"),
                 // dense vector function
-                def(TextEmbedding.class, bi(TextEmbedding::new), "text_embedding") },
-            // random functions
-            new FunctionDefinition[] { def(Random.class, uni(Random::new), "random") } };
+                def(TextEmbedding.class, bi(TextEmbedding::new), "text_embedding") } };
     }
 
     private static FunctionDefinition[][] snapshotFunctions() {

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

@@ -5,16 +5,18 @@
  * 2.0.
  */
 
-package org.elasticsearch.xpack.esql.expression.function.scalar.random;
+package org.elasticsearch.xpack.esql.expression.function.scalar.approximate;
 
 import org.elasticsearch.common.Randomness;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.compute.ann.Evaluator;
 import org.elasticsearch.compute.operator.EvalOperator.ExpressionEvaluator;
+import org.elasticsearch.xpack.esql.approximate.Approximate;
 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.expression.function.EsqlFunctionRegistry;
 import org.elasticsearch.xpack.esql.expression.function.FunctionInfo;
 import org.elasticsearch.xpack.esql.expression.function.FunctionType;
 import org.elasticsearch.xpack.esql.expression.function.Param;
@@ -23,6 +25,10 @@
 import java.io.IOException;
 import java.util.List;
 
+/**
+ * This function is used internally by {@link Approximate}, and is not exposed
+ * to users via the {@link EsqlFunctionRegistry}.
+ */
 public class Random extends UnaryScalarFunction {
     public static final NamedWriteableRegistry.Entry ENTRY = new NamedWriteableRegistry.Entry(Expression.class, "Random", Random::new);