validate length of pre-defined relationship name

git-svn-id: https://svn.code.sf.net/p/jackcess/code/jackcess/trunk@1104 f203690c-595d-4dc9-a70b-905162fa7fd2

src/main/java/com/healthmarketscience/jackcess/impl/RelationshipCreator.java

@@ -170,6 +170,11 @@ public class RelationshipCreator extends DBMutator
           "Two valid tables are required in relationship"));
     }
 
+    if(_name != null) {
+      DatabaseImpl.validateIdentifierName(
+          _name, _primaryTable.getFormat().MAX_INDEX_NAME_LENGTH, "relationship");
+    }
+
     _primaryCols = getColumns(_primaryTable, _relationship.getFromColumns());
     _secondaryCols = getColumns(_secondaryTable, _relationship.getToColumns());