Hello all, With the JCA work we are in a position to make several cleanups to the connector api. First the metadata interfaces (Element, Group, etc.) are no longer necessary - as all of our metadata will be supplied via VDBs. Previously preview mode execution still supplied metadata via the QueryMetadataInterface, which then required the wrapper metadata objects. The proposed change here is to just allow for direct use of the metadata record objects. These objects are already part of the api, since they are needed for dynamic vdb work. This would address TEIID-851. Second, and more far reaching, I would like to get rid of the I(Something) interfaces fronting the connector language impl objects. The are several reasons for this: -inconsistent I prefix usage -it no longer forces the protection of the impl objects, since they have been moved into the connector api as well (this change simplifies the dependencies between a connector and the engine). -it's an oppurtunity to use more standard names for the sql constructs. -moves another step closer to consolidating the engine and connector language implementations. To that last point here is a proposal for name changes: IAggregate - AggregateFunction IBaseInCriteria - BaseInCondition IBatchedUpdates - BatchedUpdates ICommand - Command (Statement may be a better alternative) ICompareCriteria - Comparison ICompoundCriteria - AndOr ICriteria - Condition IDelete - Delete IElement - ColumnReference IExistsCriteria - Exists IExpression - Expression IFrom - From IFromItem - TableReference IFunction - Function IGroup - NamedTable IGroupBy - GroupBy IInCriteria - In IInlineView - DerivedTable IInsert - Insert IInsertExpressionValueSource - ExpressionValueSource IInsertValueSource - InsertValueSource IIsNullCriteria - IsNull IJoin - Join (JoinedTable may also be good, since it is consistent with the other TableReference classes) ILanguageObject - LanguageObject ILikeCriteria - Like ILimit - Limit ILiteral - Literal ILogicalCriteria - removed, can already be inferred if a condition is not a Predicate IMetadataReference - MetadataReference INotCriteria - Not IOrderBy - OrderBy IOrderByItem - SortSpecification IParameter - Argument IPredicateCriteria - Predicate IProcedure - Call *I would also like to update the parser and string form of exec to use the call keyword, since it is standard IQuery - QuerySpecification IQueryCommand - QueryExpression IScalarSubquery - ScalarSubquery ISearchedCaseExpression - SearchedCase ISelect - Select ISelectSymbol - DerivedColumn ISetClause - SetClause ISetClauseList - SetClauseList ISetQuery - SetQuery ISubqueryCompareCriteria - SubqueryComparison ISubqueryContainer - SubqueryContainer ISubqueryInCriteria - SubqueryIn IUpdate - Update Any thoughs? Steve