Summary
turns the class index on or off.
- Assembly
- Db4objects
.Db4o-2010 .dll - Namespace
- Db4objects
.Db4o .Config - Containing Type
- IObjectClass
Syntax
void Indexed(bool flag)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 sub classes or super classes.
- There are convenient field indexes that will always find instances of a class.
- The application always works with IDs.
In client-server environment this setting should be used on both client and server.
This setting can be applied to an open object container.
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 sub classes or super classes.
- There are convenient field indexes that will always find instances of a class.
- The application always works with IDs.
In client-server environment this setting should be used on both client and server.
This setting can be applied to an open object container.
Parameters
| Name | Type | Description |
|---|---|---|
| flag | bool |
Return Value
| Type | Description |
|---|---|
| void |