if e.ConditionRHS == nil {
		result = e.Operand.analyze(s)
	} else {
		result.combine(e.Operand.analyze(s))
		result.combine(e.ConditionRHS.analyze(s))
	}
	return
}

func (e *ConditionRHS) analyze(s *Select) (result qProp) {
	switch {
	case e.Compare != nil:
		result = e.Compare.Operand.analyze(s)
	case e.Between != nil:
		result.combine(e.Between.Start.analyze(s))