}

// Condition represents a negation or a condition operand
type Condition struct {
	Operand *ConditionOperand `parser:"  @@"`
	Not     *Condition        `parser:"| \"NOT\" @@"`
}

// ConditionOperand is a operand followed by an optional operation expression.
type ConditionOperand struct {
	Operand      *Operand      `parser:"@@"`
	ConditionRHS *ConditionRHS `parser:"@@?"`
}

		}
		result = result && b
	}
	return FromBool(result), nil
}

func (e *Condition) evalNode(r Record, tableAlias string) (*Value, error) {
	if e.Operand != nil {
		// In this case, result does not have to be boolean
		return e.Operand.evalNode(r, tableAlias)
	}

	// Compute NOT of condition
	res, err := e.Not.evalNode(r, tableAlias)
	if err != nil {
		return nil, err
	}