Unfortunately it doesn't work. Code fails with the following: -----
Caused by: java.lang.NullPointerException at org.apache.ibatis.executor.resultset.FastResultSetHandler.createParameterize dResultObject(FastResultSetHandler.java:295) at org.apache.ibatis.executor.resultset.FastResultSetHandler.createResultObject (FastResultSetHandler.java:281) at org.apache.ibatis.executor.resultset.FastResultSetHandler.createResultObject (FastResultSetHandler.java:268) at org.apache.ibatis.executor.resultset.NestedResultSetHandler.getRowValue(Nest edResultSetHandler.java:97) at org.apache.ibatis.executor.resultset.NestedResultSetHandler.handleRowValues( NestedResultSetHandler.java:75) at org.apache.ibatis.executor.resultset.FastResultSetHandler.handleResultSet(Fa stResultSetHandler.java:107) at org.apache.ibatis.executor.resultset.NestedResultSetHandler.handleResultSets (NestedResultSetHandler.java:56) at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(Prepared StatementHandler.java:40) at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingSt atementHandler.java:55) at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:41) at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:86) at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:67) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSe ssion.java:58) ----- This is because it tries to get a typeHandler final TypeHandler typeHandler = constructorMapping.getTypeHandler(); ^^^^^^^^^^^^^^^^^^^^^^^^ - null final String column = constructorMapping.getColumn(); final Object value = typeHandler.getResult(rs, column); which is null for mapping like: <arg javaType="TypeX" resultMap="TypeXResult"/> I'm not familiar (yet) with the way nested result maps are handled in other parts of the code but it seems that some info gets set correctly in to the constructor mapping, for example the nestedresultMapId is set correctly. From: Clinton Begin [mailto:clinton.be...@gmail.com] Sent: Tuesday, January 05, 2010 12:16 PM To: user-java@ibatis.apache.org Subject: Re: is there any chance the https://issues.apache.org/jira/browse/IBATIS-717 will be implemented? Can you try it locally first? Just change the DTD to allow it. I think it works, as I believe it's all the same builder code. You'll have to change the DTD URL and PUBLIC/SYSTEM to override it locally. Clinton On Tue, Jan 5, 2010 at 9:31 AM, OBender <osya_ben...@hotmail.com> wrote: It's a feature not a bug but pretty important one I think.