HHH-18916: regex completion

According to mysql and postgresql, add "cross" and "full" keywords in the regex
https://dev.mysql.com/doc/refman/8.4/en/join.html
https://www.postgresql.org/docs/current/queries-table-expressions.html#id-1.5.6.6.5.6.4.3.1.1

Author: rguihard

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

@@ -279,7 +279,7 @@ public abstract class Dialect implements ConversionContext, TypeContributor, Fun
 	private static final Pattern ESCAPE_CLOSING_COMMENT_PATTERN = Pattern.compile( "\\*/" );
 	private static final Pattern ESCAPE_OPENING_COMMENT_PATTERN = Pattern.compile( "/\\*" );
 	private static final Pattern QUERY_PATTERN = Pattern.compile(
-		"^\\s*(select\\b.+?\\bfrom\\b.+?)(\\b(?:natural )?(?:left |right )?(?:inner |outer )?join.+?\\b)?(\\bwhere\\b.+?)$");
+		"^\\s*(select\\b.+?\\bfrom\\b.+?)(\\b(?:natural )?(?:left |right |full )?(?:inner |outer |cross )?join.+?\\b)?(\\bwhere\\b.+?)$");
 
 	private static final CoreMessageLogger LOG = Logger.getMessageLogger( MethodHandles.lookup(), CoreMessageLogger.class, Dialect.class.getName() );