HHH-11499 : Add a new DB2 dialect that uses "cross join" for cross joins instead of ","

(cherry picked from commit 19e585bf9d)

documentation/src/main/asciidoc/userguide/chapters/jdbc/Database_Access.adoc

@@ -163,7 +163,8 @@ If for some reason it is not able to determine the proper one or you want to use
 |Dialect (short name) |Remarks
 |Cache71 |Support for the Caché database, version 2007.1
 |CUBRID |Support for the CUBRID database, version 8.3. May work with later versions.
-|DB2 |Support for the DB2 database
+|DB2 |Support for the DB2 database, version 8.2.
+|DB297 |Support for the DB2 database, version 9.7.
 |DB2390 |Support for DB2 Universal Database for OS/390, also known as DB2/390.
 |DB2400 |Support for DB2 Universal Database for iSeries, also known as DB2/400.
 |DerbyTenFive |Support for the Derby database, version 10.5

hibernate-core/src/main/java/org/hibernate/dialect/DB297Dialect.java

@@ -0,0 +1,21 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.dialect;
+
+/**
+ * An SQL dialect for DB2 9.7.
+ *
+ * @author Gail Badner
+ */
+public class DB297Dialect extends DB2Dialect {
+
+	@Override
+	public String getCrossJoinSeparator() {
+		// DB2 9.7 and later support "cross join"
+		return " cross join ";
+	}
+}