[This topic is pre-release documentation and is subject to change in future releases. Blank topics are included as placeholders.]

turns the class index on or off.

Namespace: Db4objects.Db4o.Config
Assembly:   Db4objects.Db4o (in Db4objects.Db4o.dll)

Syntax

Visual Basic (Declaration)
Sub Indexed ( _
	flag As Boolean _
)
C#
void Indexed (
	bool flag
)
Visual C++
void Indexed (
	bool flag
)

Parameters

flag
System.Boolean

Remarks

turns the class index on or off.

db4o maintains an index for each class to be able to deliver all instances of a class in a query. If the class index is never needed, it can be turned off with this method to improve the performance to create and delete objects of a class.

Common cases where a class index is not needed:
- The application always works with subclasses or superclasses.
- There are convenient field indexes that will always find instances of a class.
- The application always works with IDs.