You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: util.go
    path of file: ./repos/gleam/sql/mysql
    
    the code of the file until where you have to start completion: // Copyright 2015 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law
    
func GetDefaultFieldLength(tp byte) int {
	switch tp {
	case TypeTiny:
		return 4
	case TypeShort:
		return 6
	case TypeInt24:
		return 9
	case TypeLong:
		return 11
	case TypeLonglong:
		return 21
	case TypeDecimal, TypeNewDecimal:
		// See https://dev.mysql.com/doc/refman/5.7/en/fixed-point-types.html
		return 10
	case TypeBit, TypeBlob:
		return -1
	default:
		//TODO: Add more types.
		return -1
	}
}