fix(go.sum): update ResolveSpec dependency to v1.0.87

vendor/github.com/golang-sql/sqlexp/savepoint.go

@@ -0,0 +1,37 @@
+// Copyright 2017 The Go 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 sqlexp
+
+import (
+	"database/sql/driver"
+	"errors"
+	"reflect"
+)
+
+type Savepointer interface {
+	Release(name string) string
+	Create(name string) string
+	Rollback(name string) string
+}
+
+type DriverSavepointer interface {
+	Savepointer() (Savepointer, error)
+}
+
+// SavepointFromDriver
+func SavepointFromDriver(d driver.Driver) (Savepointer, error) {
+	if q, is := d.(DriverSavepointer); is {
+		return q.Savepointer()
+	}
+	dv := reflect.ValueOf(d)
+
+	d, found := internalDrivers[dv.Type().String()]
+	if found {
+		if q, is := d.(DriverSavepointer); is {
+			return q.Savepointer()
+		}
+	}
+	return nil, errors.New("savepointer interface not found")
+}