mydb/internal/adapter/raw.go
2023-09-18 15:15:42 +08:00

50 lines
1016 B
Go

package adapter
// RawExpr interface represents values that can bypass SQL filters. This is an
// exported interface but it's rarely used directly, you may want to use the
// `db.Raw()` function instead.
type RawExpr struct {
value string
args *[]interface{}
}
func (r *RawExpr) Arguments() []interface{} {
if r.args != nil {
return *r.args
}
return nil
}
func (r RawExpr) Raw() string {
return r.value
}
func (r RawExpr) String() string {
return r.Raw()
}
// Expressions returns a logical expressio.n
func (r *RawExpr) Expressions() []LogicalExpr {
return []LogicalExpr{r}
}
// Operator returns the default compound operator.
func (r RawExpr) Operator() LogicalOperator {
return LogicalOperatorNone
}
// Empty return false if this struct has no value.
func (r *RawExpr) Empty() bool {
return r.value == ""
}
func NewRawExpr(value string, args []interface{}) *RawExpr {
r := &RawExpr{value: value, args: nil}
if len(args) > 0 {
r.args = &args
}
return r
}
var _ = LogicalExpr(&RawExpr{})