54 lines
987 B
Go
54 lines
987 B
Go
package sqlbuilder
|
|
|
|
import "bytes"
|
|
|
|
type FuncExpression struct {
|
|
name string
|
|
expression Expression
|
|
|
|
alias string
|
|
}
|
|
|
|
func (f *FuncExpression) As(alias string) Clause {
|
|
newFuncExpression := *f
|
|
|
|
newFuncExpression.alias = alias
|
|
|
|
return &newFuncExpression
|
|
}
|
|
|
|
func (f *FuncExpression) SerializeSql(out *bytes.Buffer, options ...serializeOption) error {
|
|
out.WriteString(f.name)
|
|
out.WriteString("(")
|
|
err := f.expression.SerializeSql(out)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
out.WriteString(")")
|
|
|
|
if f.alias != "" {
|
|
out.WriteString(` AS "`)
|
|
out.WriteString(f.alias)
|
|
out.WriteString(`"`)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
//func (f *FuncExpression) SerializeSqlForColumnList(out *bytes.Buffer) error {
|
|
// return f.SerializeSql(out)
|
|
//}
|
|
|
|
func MAX(expression Expression) *FuncExpression {
|
|
return &FuncExpression{
|
|
name: "MAX",
|
|
expression: expression,
|
|
}
|
|
}
|
|
|
|
func SUM(expression Expression) *FuncExpression {
|
|
return &FuncExpression{
|
|
name: "SUM",
|
|
expression: expression,
|
|
}
|
|
}
|