如何在MAT Eclipse中使用OQL进行嵌入式查询
我可以使用查询获取所有Thread对象，如下所示
SELECT OBJECTS dominators(s) FROM java.lang.Thread s 那么如果我想对返回的结果对象进行进一步的分析，我认为OQL应该如下所示：
SELECT * from (SELECT OBJECTS dominators(s) FROM java.lang.Thread s)
但它转向ClassCastException。
Problem reported: ClassCastException occured. Remember: sub queries with the modifier INSTANCESOF or INCLUDING SUBCLASSES must return only class objects java.lang.ClassCastException: org.eclipse.mat.parser.model.InstanceImpl cannot be cast to org.eclipse.mat.snapshot.model.IClass at org.eclipse.mat.parser.internal.oql.OQLQueryImpl.doSubQuery(OQLQueryImpl.java:752) at org.eclipse.mat.parser.internal.oql.OQLQueryImpl.internalExecute(OQLQueryImpl.java:642) at org.eclipse.mat.parser.internal.oql.OQLQueryImpl.execute(OQLQueryImpl.java:627) at org.eclipse.mat.inspections.OQLQuery.execute(OQLQuery.java:50) at org.eclipse.mat.inspections.OQLQuery.execute(OQLQuery.java:1) at org.eclipse.mat.query.registry.ArgumentSet.execute(ArgumentSet.java:129) at org.eclipse.mat.ui.snapshot.panes.OQLPane$OQLJob.doRun(OQLPane.java:339) at org.eclipse.mat.ui.editor.AbstractPaneJob.run(AbstractPaneJob.java:34) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
MAT Eclipse中的OQL是否支持嵌入式查询，如何获得我想要的结果？
使子查询工作有点棘手。 试试以下：
SELECT * from OBJECTS (SELECT OBJECTS dominators(s) FROM java.lang.Thread s)
我从以下链接获得解决方案： https ： //www.eclipse.org/forums/index.php/t/608746/