oldname = filepathlite.FromSlash(oldname)

	// need the exact location of the oldname when it's relative to determine if it's a directory
	destpath := oldname
	if v := filepathlite.VolumeName(oldname); v == "" {
		if len(oldname) > 0 && IsPathSeparator(oldname[0]) {
			// oldname is relative to the volume containing newname.
			if v = filepathlite.VolumeName(newname); v != "" {

            return null;
          }
        };
    Callables.threadRenaming(callable, newName).call();
    assertEquals(oldName, Thread.currentThread().getName());
  }

  @J2ktIncompatible
  @GwtIncompatible // threads
  public void testRenaming_exceptionalReturn() throws Exception {
    String oldName = Thread.currentThread().getName();
    final Supplier<String> newName = Suppliers.ofInstance("MyCrazyThreadName");

            return null;
          }
        };
    Callables.threadRenaming(callable, newName).call();
    assertEquals(oldName, Thread.currentThread().getName());
  }

  @J2ktIncompatible
  @GwtIncompatible // threads
  public void testRenaming_exceptionalReturn() throws Exception {
    String oldName = Thread.currentThread().getName();
    final Supplier<String> newName = Suppliers.ofInstance("MyCrazyThreadName");

		if ofi, err := Lstat(oldname); err != nil {
			if pe, ok := err.(*PathError); ok {
				err = pe.Err
			}
			return &LinkError{"rename", oldname, newname, err}
		} else if newname == oldname || !SameFile(fi, ofi) {
			return &LinkError{"rename", oldname, newname, syscall.EEXIST}
		}
	}
	err = ignoringEINTR(func() error {
		return syscall.Rename(oldname, newname)
	})
	if err != nil {

	GetTypeAliases(databaseTypeName string) []string

	// Tables
	CreateTable(dst ...interface{}) error
	DropTable(dst ...interface{}) error
	HasTable(dst interface{}) bool
	RenameTable(oldName, newName interface{}) error
	GetTables() (tableList []string, err error)
	TableType(dst interface{}) (TableType, error)

	// Columns
	AddColumn(dst interface{}, field string) error

// Link creates newname as a hard link to the oldname file.
// If there is an error, it will be of type *LinkError.
func Link(oldname, newname string) error {
	return &LinkError{"link", oldname, newname, syscall.EPLAN9}
}

// Symlink creates newname as a symbolic link to oldname.
// On Windows, a symlink to a non-existent oldname creates a file symlink;
// if oldname is later created as a directory the symlink will not work.

	})

	return count > 0
}

// RenameTable rename table from oldName to newName
func (m Migrator) RenameTable(oldName, newName interface{}) error {
	var oldTable, newTable interface{}
	if v, ok := oldName.(string); ok {
		oldTable = clause.Table{Name: v}
	} else {
		stmt := &gorm.Statement{DB: m.DB}
		if err := stmt.Parse(oldName); err == nil {
			oldTable = m.CurrentTable(stmt)
		} else {
			return err

// when in fact the algorithm is faster than the standard one.
func Diff(oldName string, old []byte, newName string, new []byte) []byte {
	if bytes.Equal(old, new) {
		return nil
	}
	x := lines(old)
	y := lines(new)

	// Print diff header.
	var out bytes.Buffer
	fmt.Fprintf(&out, "diff %s %s\n", oldName, newName)
	fmt.Fprintf(&out, "--- %s\n", oldName)
	fmt.Fprintf(&out, "+++ %s\n", newName)

	// Loop over matches to consider,

	}
	return err
}

// Symlink creates a symlink newname -> oldname.
func (sh *Shell) Symlink(oldname, newname string) error {
	// It's not an error to try to recreate an existing symlink.
	if link, err := os.Readlink(newname); err == nil && link == oldname {
		return nil
	}

	if cfg.BuildN || cfg.BuildX {
		sh.ShowCmd("", "ln -s %s %s", oldname, newname)
		if cfg.BuildN {
			return nil
		}
	}

    val currentThread = Thread.currentThread()
    val oldName = currentThread.name
    currentThread.name = task.name

    var delayNanos = -1L
    try {
      delayNanos = task.runOnce()
    } finally {
      lock.withLock {
        afterRun(task, delayNanos)
      }
      currentThread.name = oldName
    }
  }

  private fun afterRun(
    task: Task,