Allow the driver to support setObject with Types.DISTINCT.

We report metadata indicating that values are of this type, so
we'd better accept it coming back in.

Reported by Vitalii Tymchyshyn.

org/postgresql/jdbc2/AbstractJdbc2Statement.java

@@ -3,7 +3,7 @@
 * Copyright (c) 2004-2008, PostgreSQL Global Development Group
 *
 * IDENTIFICATION
-*   $PostgreSQL: pgjdbc/org/postgresql/jdbc2/AbstractJdbc2Statement.java,v 1.107.2.3 2009/09/26 15:21:34 jurka Exp $
+*   $PostgreSQL: pgjdbc/org/postgresql/jdbc2/AbstractJdbc2Statement.java,v 1.107.2.4 2010/05/01 16:08:04 jurka Exp $
 *
 *-------------------------------------------------------------------------
 */
@@ -1687,6 +1687,9 @@ public void setObject(int parameterIndex, Object in, int targetSqlType, int scal
                 else
                     throw new PSQLException(GT.tr("Cannot cast an instance of {0} to type {1}", new Object[]{in.getClass().getName(),"Types.ARRAY"}), PSQLState.INVALID_PARAMETER_TYPE);
                 break;
+            case Types.DISTINCT:
+                bindString(parameterIndex, in.toString(), Oid.UNSPECIFIED);
+                break;
 	        case Types.OTHER:
 	            if (in instanceof PGobject)
 	                setPGobject(parameterIndex, (PGobject)in);