ESQL: extend TranslationAware to all pushable expressions (#120192) (#…

…120475)

This expands the `TranslationAware` interface for expressions that
support translations to Lucene query and moves the implementations of
these translations from a centralised place (ExpressionTranslators) to
the respective expression classes.

`TranslationAware` has now a subinterface,
`SingleValueTranslationAware`, for expressions that need to implement
the single-value logic (`null` out on MVs). So the `SingleValueQuery`
wrapping no longer needs to be performed explicitly by the implementer.

`TranslationAware` is now part of the
`org.elasticsearch.xpack.esql.capabilities` package, together with the
other interfaces that extensions needs to implement to be used by the
core services (verifier and optimizer). To allow this, some logical
nodes have been moved from core in the ESQL proper (where also
`LucenePushdownPredicates` resides, used by `TranslationAware`).

(cherry picked from commit a867127)

docs/changelog/120192.yaml

@@ -0,0 +1,5 @@
+pr: 120192
+summary: Extend `TranslationAware` to all pushable expressions
+area: ES|QL
+type: enhancement
+issues: []

x-pack/plugin/esql-core/src/test/java/org/elasticsearch/xpack/esql/core/util/TestUtils.java

@@ -7,10 +7,8 @@
 
 package org.elasticsearch.xpack.esql.core.util;
 
-import org.elasticsearch.xpack.esql.core.expression.Expression;
 import org.elasticsearch.xpack.esql.core.expression.FieldAttribute;
 import org.elasticsearch.xpack.esql.core.expression.Literal;
-import org.elasticsearch.xpack.esql.core.expression.predicate.Range;
 import org.elasticsearch.xpack.esql.core.tree.Source;
 import org.elasticsearch.xpack.esql.core.type.DataType;
 import org.elasticsearch.xpack.esql.core.type.EsField;
@@ -21,7 +19,6 @@
 import static org.elasticsearch.test.ESTestCase.randomAlphaOfLength;
 import static org.elasticsearch.test.ESTestCase.randomBoolean;
 import static org.elasticsearch.test.ESTestCase.randomFrom;
-import static org.elasticsearch.test.ESTestCase.randomZone;
 import static org.elasticsearch.xpack.esql.core.tree.Source.EMPTY;
 import static org.elasticsearch.xpack.esql.core.type.DataType.INTEGER;
 
@@ -44,10 +41,6 @@ public static Literal of(Source source, Object value) {
         return new Literal(source, value, DataType.fromJava(value));
     }
 
-    public static Range rangeOf(Expression value, Expression lower, boolean includeLower, Expression upper, boolean includeUpper) {
-        return new Range(EMPTY, value, lower, includeLower, upper, includeUpper, randomZone());
-    }
-
     public static FieldAttribute fieldAttribute() {
         return fieldAttribute(randomAlphaOfLength(10), randomFrom(DataType.types()));
     }

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

@@ -44,7 +44,6 @@
 import org.elasticsearch.xpack.esql.core.expression.FoldContext;
 import org.elasticsearch.xpack.esql.core.expression.Literal;
 import org.elasticsearch.xpack.esql.core.expression.ReferenceAttribute;
-import org.elasticsearch.xpack.esql.core.expression.predicate.Range;
 import org.elasticsearch.xpack.esql.core.expression.predicate.regex.RLikePattern;
 import org.elasticsearch.xpack.esql.core.expression.predicate.regex.WildcardPattern;
 import org.elasticsearch.xpack.esql.core.tree.Source;
@@ -55,6 +54,7 @@
 import org.elasticsearch.xpack.esql.expression.function.EsqlFunctionRegistry;
 import org.elasticsearch.xpack.esql.expression.function.scalar.string.RLike;
 import org.elasticsearch.xpack.esql.expression.function.scalar.string.WildcardLike;
+import org.elasticsearch.xpack.esql.expression.predicate.Range;
 import org.elasticsearch.xpack.esql.expression.predicate.operator.comparison.Equals;
 import org.elasticsearch.xpack.esql.expression.predicate.operator.comparison.GreaterThan;
 import org.elasticsearch.xpack.esql.expression.predicate.operator.comparison.GreaterThanOrEqual;