Just wanted to check with the group before filing a Jira, but it appears there is some code needed in the implementation of DrillColumnMetaDataList. It extends BasicList which throws a number of UnsupportedOperationExceptions for basic List interface methods, but DrillColumnMetaDataList is not overriding them. The one I ran into first is iterator(), which is being called in findColumn0() of AvaticaResultSet (called in turn by the public JDBC API method findColumn(name)):
https://github.com/julianhyde/optiq/blob/master/avatica/src/main/java/net/hy dromatic/avatica/AvaticaResultSet.java#L68 Calling findColumn() from the JDBC API results in an UnsupportedOperationException. I suspect iterator() was not implemented in BaseList to allow subclasses to define their own method of iteration. I suppose a case could be made to add a default implementation, but I can also see where one should not rely on such an implementation for a subclass, and instead should provide its own. However, in that case, shouldn't the List interface methods remain abstract, rather than having a default implementation that throws an exception at runtime? Regards, Matt
