HHH-16898 add JpaExpression.equalTo()

hibernate-core/src/main/java/org/hibernate/query/criteria/JpaExpression.java

@@ -52,4 +52,8 @@ public interface JpaExpression<T> extends JpaSelection<T>, Expression<T> {
 
 	@Override
 	JpaPredicate in(Expression<Collection<?>> values);
+
+	JpaPredicate equalTo(Expression<T> that);
+
+	JpaPredicate equalTo(T that);
 }

hibernate-core/src/main/java/org/hibernate/query/hql/internal/FullyQualifiedReflectivePathTerminal.java

@@ -207,6 +207,16 @@ public class FullyQualifiedReflectivePathTerminal
 		return null;
 	}
 
+	@Override
+	public SqmPredicate equalTo(Expression that) {
+		return null;
+	}
+
+	@Override
+	public SqmPredicate equalTo(Object that) {
+		return null;
+	}
+
 	@Override
 	public SqmPredicate in(Object... values) {
 		return null;

hibernate-core/src/main/java/org/hibernate/query/sqm/tree/expression/AbstractSqmExpression.java

@@ -23,7 +23,6 @@ import org.hibernate.type.descriptor.java.JavaType;
 
 import jakarta.persistence.criteria.Expression;
 
-import static org.hibernate.query.internal.QueryHelper.highestPrecedenceType;
 import static org.hibernate.query.internal.QueryHelper.highestPrecedenceType2;
 
 /**
@@ -115,6 +114,16 @@ public abstract class AbstractSqmExpression<T> extends AbstractJpaSelection<T> i
 		return nodeBuilder().isNotNull( this );
 	}
 
+	@Override
+	public SqmPredicate equalTo(Expression<T> that) {
+		return nodeBuilder().equal( this, that );
+	}
+
+	@Override
+	public SqmPredicate equalTo(T that) {
+		return nodeBuilder().equal( this, that );
+	}
+
 	@Override
 	public SqmPredicate in(Object... values) {
 		return nodeBuilder().in( this, values );

hibernate-core/src/main/java/org/hibernate/query/sqm/tree/expression/SqmExpression.java

@@ -36,7 +36,7 @@ import static java.util.Arrays.asList;
 public interface SqmExpression<T> extends SqmSelectableNode<T>, JpaExpression<T> {
 	/**
 	 * The expression's type.
-	 *
+	 * <p>
 	 * Can change as a result of calls to {@link #applyInferableType}
 	 */
 	@Override
@@ -92,6 +92,12 @@ public interface SqmExpression<T> extends SqmSelectableNode<T>, JpaExpression<T>
 	@Override
 	SqmPredicate isNotNull();
 
+	@Override
+	SqmPredicate equalTo(Expression<T> that);
+
+	@Override
+	SqmPredicate equalTo(T that);
+
 	@Override
 	SqmPredicate in(Object... values);
 

hibernate-core/src/main/java/org/hibernate/query/sqm/tree/expression/SqmFieldLiteral.java

@@ -152,6 +152,16 @@ public class SqmFieldLiteral<T> implements SqmExpression<T>, SqmExpressible<T>,
 		return nodeBuilder().isNull( this );
 	}
 
+	@Override
+	public SqmPredicate equalTo(Expression<T> that) {
+		return nodeBuilder().equal( this, that );
+	}
+
+	@Override
+	public SqmPredicate equalTo(T that) {
+		return nodeBuilder().equal( this, that );
+	}
+
 	@Override
 	public SqmPredicate isNotNull() {
 		return nodeBuilder().isNotNull( this );

hibernate-core/src/main/java/org/hibernate/query/sqm/tree/select/SqmSubQuery.java

@@ -560,6 +560,16 @@ public class SqmSubQuery<T> extends AbstractSqmSelectQuery<T> implements SqmSele
 		return nodeBuilder().isNotNull( this );
 	}
 
+	@Override
+	public SqmPredicate equalTo(Expression<T> that) {
+		return nodeBuilder().equal( this, that );
+	}
+
+	@Override
+	public SqmPredicate equalTo(T that) {
+		return nodeBuilder().equal( this, that );
+	}
+
 	@Override
 	public SqmInPredicate<?> in(Object... values) {
 		return nodeBuilder().in( this, values );