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Oracle Discoverer Administrator Administration Guide 10g (9.0.4) Part Number B10270-01 |
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## Database Storage Properties dialog: Materialized Views tab

Use this tab to view and set database storage properties that are specific to Oracle 8.1.7 (or later) Enterprise Edition databases.

Note: Database storage properties do not apply to summary folders based on external summary tables.

For more information, see:

"Managing summary folders"

"What are materialized views?"

"Creating summary folders manually"

"How to edit database storage properties of summary combinations for a summary folder"

The following table lists the properties and their default values, where appropriate. When you select a property, the panel at the bottom of the dialog displays a description of the purpose of the property.

Property | Default Value | Range | Create/Edit
--- | --- | --- | ---
Parallel Inserts | No | Yes/No/Default | yes
No. of Processes | 1 |  | yes, if Parallel Inserts set to yes
Logging | Same as user's tablespace | Yes/No | yes
Cache | No | Yes/No | yes, if Logging set to yes
Refresh Type | Full | Full/Incremental | yes
Refresh | On demand | On demand/On commit |
Last Refresh |  |  | no
Incremental Load |  |  | no
Stale |  |  | no

#### Parallel Inserts

Use this property to choose whether to use parallel inserts when refreshing summary folders.

#### No. of processes

Use this property (if Parallel Inserts is set to Yes) to set the number of parallel processes used when refreshing summary folders.

#### Logging

Use this property to enable or disable database logging.

#### Cache

Use this property to enable or disable database caching.

#### Refresh Type

Use this property to specify whether the summary folder Refresh Type is Incremental or Full.

- Incremental

  Only rows that have changed in the detail tables will be applied to the summary folder.

  For more information on the conditions required for incremental refresh, see the Oracle9i Data Warehousing Guide.

- Full

  The summary folder is entirely rebuilt from the detail tables.

#### Refresh Mode

Use this property to specify whether the summary folder Refresh Mode is On demand or On commit.

- On demand

  Select this option to refresh manually or through scheduled refreshes.

- On commit

  Select this option to refresh every time the detail tables are updated. There is no need to schedule refreshes, and the scheduling option of the Summary Wizard is not enabled.

  Restrictions apply as to when you can perform a refresh On commit. For more information, see the Oracle9i Data Warehousing Guide.

#### Last Refresh

This read-only property indicates the date when the last summary folder was refreshed.

#### Incremental Load

This read-only property indicates the types of inserts to the detail/fact table that can be incrementally refreshed.

- None

  The materialized view cannot be incrementally refreshed.

- Direct Load

  Only direct loads can be handled.

- DML

  Only DML (data manipulation language) statements can be handled.

- Direct Load and DML

  Both direct loads and DML can be handled.

- Direct Load and limited DML

  Direct loads and a subset of DML will be handled (for more information, see the Oracle9i Database documentation)

#### Stale

This read-only property indicates whether the detail tables have changed since the last summary folder refresh.

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