update latest xorm version to vendor (#2353)

vendor/github.com/go-xorm/xorm/session_stats.go

@@ -0,0 +1,118 @@
+// 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) {
+	defer session.resetStatement()
+	if session.isAutoClose {
+		defer session.Close()
+	}
+
+	var sqlStr string
+	var args []interface{}
+	var err error
+	if session.statement.RawSQL == "" {
+		sqlStr, args, err = session.statement.genCountSQL(bean...)
+		if err != nil {
+			return 0, err
+		}
+	} else {
+		sqlStr = session.statement.RawSQL
+		args = session.statement.RawParams
+	}
+
+	session.queryPreprocess(&sqlStr, args...)
+
+	var total int64
+	if session.isAutoCommit {
+		err = session.DB().QueryRow(sqlStr, args...).Scan(&total)
+	} else {
+		err = session.tx.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 {
+	defer session.resetStatement()
+	if session.isAutoClose {
+		defer session.Close()
+	}
+
+	v := reflect.ValueOf(res)
+	if v.Kind() != reflect.Ptr {
+		return errors.New("need a pointer to a variable")
+	}
+
+	var isSlice = v.Elem().Kind() == reflect.Slice
+	var sqlStr string
+	var args []interface{}
+	var err error
+	if len(session.statement.RawSQL) == 0 {
+		sqlStr, args, err = session.statement.genSumSQL(bean, columnNames...)
+		if err != nil {
+			return err
+		}
+	} else {
+		sqlStr = session.statement.RawSQL
+		args = session.statement.RawParams
+	}
+
+	session.queryPreprocess(&sqlStr, args...)
+
+	if isSlice {
+		if session.isAutoCommit {
+			err = session.DB().QueryRow(sqlStr, args...).ScanSlice(res)
+		} else {
+			err = session.tx.QueryRow(sqlStr, args...).ScanSlice(res)
+		}
+	} else {
+		if session.isAutoCommit {
+			err = session.DB().QueryRow(sqlStr, args...).Scan(res)
+		} else {
+			err = session.tx.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...)
+}