final List<String> rightAncestors = getSourceNameList(right);
return pq.getJte().getExpressions(leftAncestors, rightAncestors);
}
public static List<Column> getJSQLColumns(Expression expr) {
final ColumnCollectVisitor columnCollect = new ColumnCollectVisitor();
expr.accept(columnCollect);
return columnCollect.getColumns();
}