Bump version to 5.11.0

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

@@ -0,0 +1,59 @@
+// 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 (
+	"context"
+	"database/sql/driver"
+	"errors"
+	"reflect"
+)
+
+const (
+	DialectPostgres = "postgres"
+	DialectTSQL     = "tsql"
+	DialectMySQL    = "mysql"
+	DialectSQLite   = "sqlite"
+	DialectOracle   = "oracle"
+)
+
+// Namer returns the name of the database and the SQL dialect it
+// uses.
+type Namer interface {
+	// Name of the database management system.
+	//
+	// Examples:
+	//    "posgresql-9.6"
+	//    "sqlserver-10.54.32"
+	//    "cockroachdb-1.0"
+	Name() string
+
+	// Dialect of SQL used in the database.
+	Dialect() string
+}
+
+// DriverNamer may be implemented on the driver.Driver interface.
+// It may need to request information from the server to return
+// the correct information.
+type DriverNamer interface {
+	Namer(ctx context.Context) (Namer, error)
+}
+
+// NamerFromDriver returns the DriverNamer from the DB if
+// it is implemented.
+func NamerFromDriver(d driver.Driver, ctx context.Context) (Namer, error) {
+	if q, is := d.(DriverNamer); is {
+		return q.Namer(ctx)
+	}
+	dv := reflect.ValueOf(d)
+
+	d, found := internalDrivers[dv.Type().String()]
+	if found {
+		if q, is := d.(DriverNamer); is {
+			return q.Namer(ctx)
+		}
+	}
+	return nil, errors.New("namer not found")
+}