82 lines
2.3 KiB
Go
82 lines
2.3 KiB
Go
|
// Copyright 2016 The Xorm Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
package xorm
|
||
|
|
|
||
|
|
import (
|
||
|
|
"database/sql"
|
||
|
|
"errors"
|
||
|
|
"reflect"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Count counts the records. bean's non-empty fields
|
||
|
|
// are conditions.
|
||
|
|
func (session *Session) Count(bean ...interface{}) (int64, error) {
|
||
|
|
if session.isAutoClose {
|
||
|
|
defer session.Close()
|
||
|
|
}
|
||
|
|
|
||
|
|
sqlStr, args, err := session.statement.GenCountSQL(bean...)
|
||
|
|
if err != nil {
|
||
|
|
return 0, err
|
||
|
|
}
|
||
|
|
|
||
|
|
var total int64
|
||
|
|
err = session.queryRow(sqlStr, args...).Scan(&total)
|
||
|
|
if err == sql.ErrNoRows || err == nil {
|
||
|
|
return total, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0, err
|
||
|
|
}
|
||
|
|
|
||
|
|
// sum call sum some column. bean's non-empty fields are conditions.
|
||
|
|
func (session *Session) sum(res interface{}, bean interface{}, columnNames ...string) error {
|
||
|
|
if session.isAutoClose {
|
||
|
|
defer session.Close()
|
||
|
|
}
|
||
|
|
|
||
|
|
v := reflect.ValueOf(res)
|
||
|
|
if v.Kind() != reflect.Ptr {
|
||
|
|
return errors.New("need a pointer to a variable")
|
||
|
|
}
|
||
|
|
|
||
|
|
sqlStr, args, err := session.statement.GenSumSQL(bean, columnNames...)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
if v.Elem().Kind() == reflect.Slice {
|
||
|
|
err = session.queryRow(sqlStr, args...).ScanSlice(res)
|
||
|
|
} else {
|
||
|
|
err = session.queryRow(sqlStr, args...).Scan(res)
|
||
|
|
}
|
||
|
|
if err == sql.ErrNoRows || err == nil {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
// Sum call sum some column. bean's non-empty fields are conditions.
|
||
|
|
func (session *Session) Sum(bean interface{}, columnName string) (res float64, err error) {
|
||
|
|
return res, session.sum(&res, bean, columnName)
|
||
|
|
}
|
||
|
|
|
||
|
|
// SumInt call sum some column. bean's non-empty fields are conditions.
|
||
|
|
func (session *Session) SumInt(bean interface{}, columnName string) (res int64, err error) {
|
||
|
|
return res, session.sum(&res, bean, columnName)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Sums call sum some columns. bean's non-empty fields are conditions.
|
||
|
|
func (session *Session) Sums(bean interface{}, columnNames ...string) ([]float64, error) {
|
||
|
|
var res = make([]float64, len(columnNames), len(columnNames))
|
||
|
|
return res, session.sum(&res, bean, columnNames...)
|
||
|
|
}
|
||
|
|
|
||
|
|
// SumsInt sum specify columns and return as []int64 instead of []float64
|
||
|
|
func (session *Session) SumsInt(bean interface{}, columnNames ...string) ([]int64, error) {
|
||
|
|
var res = make([]int64, len(columnNames), len(columnNames))
|
||
|
|
return res, session.sum(&res, bean, columnNames...)
|
||
|
|
}
|