Manual:IDBAccessObject.php

MediaWiki file: IDBAccessObject.php
Location:	includes/libs/rdbms/
Source code:	master • 1.43.0 • 1.42.4 • 1.39.11
Classes:	IDBAccessObject

Interface for database access objects.

Classes using this support a set of constants in a bitfield argument to their data loading functions. In general, objects should assume READ_NORMAL if no flags are explicitly given, though certain objects may assume READ_LATEST for common use case or legacy reasons.

There are four types of reads:

READ_NORMAL : Potentially cached read of data (e.g. from a replica DB or stale replica)
READ_LATEST : Up-to-date read as of transaction start (e.g. from primary or a quorum read)
READ_LOCKING : Up-to-date read as of now, that locks (shared) the records
READ_EXCLUSIVE : Up-to-date read as of now, that locks (exclusive) the records

All record locks persist for the duration of the transaction.

Extended by

Implemented by

DBAccessObjectUtils

Public methods

None.