From 4981881dc724f4f5b1c4998c0f8c223f40f26a59 Mon Sep 17 00:00:00 2001
From: jiangchangren <jiangchangren@startable.cn>
Date: Thu, 1 Dec 2022 11:00:12 +0800
Subject: [PATCH] add private scanner for scan

---
 scan.go | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/scan.go b/scan.go
index 0a26ce4b..5ac4ec15 100644
--- a/scan.go
+++ b/scan.go
@@ -98,6 +98,10 @@ func (db *DB) scanIntoStruct(rows Rows, reflectValue reflect.Value, values []int
 // ScanMode scan data mode
 type ScanMode uint8
 
+type Scanner interface {
+	Scan(values []interface{}, columns []string)
+}
+
 // scan modes
 const (
 	ScanInitialized         ScanMode = 1 << 0 // 1
@@ -118,6 +122,17 @@ func Scan(rows Rows, db *DB, mode ScanMode) {
 	db.RowsAffected = 0
 
 	switch dest := db.Statement.Dest.(type) {
+	case Scanner:
+		columnTypes, _ := rows.ColumnTypes()
+		for initialized || rows.Next() {
+			prepareValues(values, db, columnTypes, columns)
+
+			initialized = false
+			db.RowsAffected++
+			db.AddError(rows.Scan(values...))
+
+			dest.Scan(values,columns)
+		}
 	case map[string]interface{}, *map[string]interface{}:
 		if initialized || rows.Next() {
 			columnTypes, _ := rows.ColumnTypes()