add vendor packages避免用户网络太慢无法下载编译

vendor/github.com/zr-hebo/util-db/scanner.go

@@ -0,0 +1,54 @@
+package db
+
+import (
+	"database/sql"
+	"fmt"
+)
+
+// CheckPair CheckPair
+type CheckPair struct {
+	Host
+	UserErp string `json:"erp"`
+	DBName  string `json:"dbname"`
+}
+
+func (cp *CheckPair) String() string {
+	return fmt.Sprintf(
+		"check if %s can visit %s@%s:%d", cp.UserErp, cp.DBName, cp.IP, cp.Port)
+}
+
+// Scanner SQL rows读取器
+type Scanner interface {
+	Scan(*sql.Rows, ...*string) error
+}
+
+type showNullScanner struct {
+}
+
+// NewShowNullScanner 显示NULL值的接收器，要求Scan的时候传入的参数是string类型
+func NewShowNullScanner() (s Scanner) {
+	return new(showNullScanner)
+}
+
+func (ns *showNullScanner) Scan(
+	rows *sql.Rows, receivers ...*string) (err error) {
+	nullReceivers := make([]interface{}, 0, len(receivers))
+	for range receivers {
+		nullReceivers = append(nullReceivers, &sql.NullString{})
+	}
+
+	if err = rows.Scan(nullReceivers...); err != nil {
+		return
+	}
+
+	for i, rv := range nullReceivers {
+		nullReceiver := rv.(*sql.NullString)
+		if nullReceiver.Valid {
+			*receivers[i] = nullReceiver.String
+		} else {
+			*receivers[i] = "NULL"
+		}
+	}
+
+	return
+}