Structure

MySQLProtocol.NullBitmap

14.7.2.1 NULL-Bitmap

struct NullBitmap

Overview

The binary protocol sends NULL values as bits inside a bitmap instead of a full byte as the ProtocolText::ResultsetRow does. If many NULL values are sent, it is more efficient than the old way.

https://dev.mysql.com/doc/internals/en/null-bitmap.html

Topics

Instance Properties

bytes
the raw bitmap bytes.
description
See CustomStringConvertible.description
offset
This bitmap’s static offset. This varies depending on which packet the bitmap is being used in.

Instance Methods

isNull(at:)
Returns true if the bitmap is null at the supplied position.
setNull(at:)
Sets the position to null.

Type Methods

binaryResultSetBitmap(bytes:)
Creates a new MySQLNullBitmap suitable for binary result set packets.
comExecuteBitmap(count:)
Creates a new MySQLNullBitmap suitable for com statement execute packets.
readResultSetNullBitmap(count:from:)
Reads a MySQLNullBitmap for binary result sets from the ByteBuffer.

Relationships

Conforms To

Swift.CustomStringConvertible