Summary
turns indexing on or off.
- Assembly
- Db4objects
.Db4o-2010 .dll - Namespace
- Db4objects
.Db4o .Config - Containing Type
- IObjectField
Syntax
void Indexed(bool flag)Remarks
turns indexing on or off.
Field indices dramatically improve query performance but they may considerably reduce storage and update performance.
The best benchmark whether or not an index on a field achieves the desired result is the completed application - with a data load that is typical for it's use.
This configuration setting is only checked when the
In client-server environment this setting should be used on both client and server.
If this setting is applied to an open ObjectContainer it will take an effect on the next time ObjectContainer is opened.
Field indices dramatically improve query performance but they may considerably reduce storage and update performance.
The best benchmark whether or not an index on a field achieves the desired result is the completed application - with a data load that is typical for it's use.
This configuration setting is only checked when the
Db4objects.Db4o.IObjectContainer
is opened. If the
setting is set to true and an index does not exist, the index will be
created. If the setting is set to false and an index does exist the
index will be dropped.In client-server environment this setting should be used on both client and server.
If this setting is applied to an open ObjectContainer it will take an effect on the next time ObjectContainer is opened.
Parameters
| Name | Type | Description |
|---|---|---|
| flag | bool | specify true or false to turn indexing on for this field |
Return Value
| Type | Description |
|---|---|
| void |