jet/internal/jet/order_by_clause.go
2019-08-03 14:10:47 +02:00

35 lines
732 B
Go

package jet
import "errors"
// OrderByClause
type orderByClause interface {
serializeForOrderBy(statement StatementType, out *SqlBuilder) error
}
type orderByClauseImpl struct {
expression Expression
ascent bool
}
func (o *orderByClauseImpl) serializeForOrderBy(statement StatementType, out *SqlBuilder) error {
if o.expression == nil {
return errors.New("jet: nil orderBy by clause")
}
if err := o.expression.serializeForOrderBy(statement, out); err != nil {
return err
}
if o.ascent {
out.WriteString("ASC")
} else {
out.WriteString("DESC")
}
return nil
}
func newOrderByClause(expression Expression, ascent bool) orderByClause {
return &orderByClauseImpl{expression: expression, ascent: ascent}
}