return veVisitor.getAllExpressions();
}
private List<ValueExpression> getBeforeProjVEs(Component component) {
final VECollectVisitor veVisitor = new VECollectVisitor();
veVisitor.visit(component);
return veVisitor.getBeforeProjExpressions();
}
// in this method, only plain indexes are detected
// agg.GroupBy and hashIndexes