OPENJPA-745 raise string right truncation error for Sybase

git-svn-id: https://svn.apache.org/repos/asf/openjpa/trunk@706493 13f79535-47bb-0310-9956-ffa450edef68

openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/kernel/JDBCStoreManager.java

@@ -920,6 +920,7 @@ public class JDBCStoreManager
                 _conn = connectInternal();
             if (ref)
                 _conn.ref();
+            _dict.initializeSettings(_conn);
         } catch (SQLException se) {
             throw SQLExceptions.getStore(se, _dict);
         } finally {

openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/sql/DBDictionary.java

@@ -200,6 +200,7 @@ public class DBDictionary
     public String selectWords = null;
     public String fixedSizeTypeNames = null;
     public String schemaCase = SCHEMA_CASE_UPPER;
+    public boolean setStringRightTruncationOn = true;
 
     // sql
     public String validationSQL = null;
@@ -4561,4 +4562,8 @@ public class DBDictionary
     				length));
     	return name;
     }
+    
+    public void initializeSettings(Connection conn) 
+        throws SQLException {
+    }
 }

openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/sql/SybaseDictionary.java

@@ -269,6 +269,20 @@ public class SybaseDictionary
         return new SybaseConnection(super.decorate(conn));
     }
     
+    public void initializeSettings(Connection conn)
+        throws SQLException {
+        // In order for Sybase to raise the truncation exception when the 
+        // string length is greater than the column length for Char, VarChar, 
+        // Binary, VarBinary, the "set string_rtruncation on" must be executed. 
+        // This setting is effective for the duration of current connection.
+        if (setStringRightTruncationOn) {
+            String str = "set string_rtruncation on";
+            PreparedStatement stmnt = prepareStatement(conn, str);        
+            stmnt.execute();
+            stmnt.close();
+        }
+    }
+
     /**
      * Connection wrapper to cache the {@link Connection#getCatalog} result,
      * which takes a very long time with the Sybase Connection (and