Oracle Table Index Editor - Physical Tab
The Physical tab is used in the Oracle Index Editor for Tables and the Oracle Index Editor for Materialized Views. Use the Physical tab to assign physical and storage properties. The following options are available for this tab:
- Unique
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Specifies that the value of the column on which the index is based is unique.
- Bitmap
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Specifies that the index is created with a bitmap for each distinct key, instead of indexing each row separately. This option is not available for a clustered materialized view.
- Storage properties
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Specifies how to store a permanent database object. Clicking this button opens the Oracle Storage Properties Dialog where you can assign storage properties to the index. This option is disabled when using a global temporary table.
- Physical Property
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Specifies values for physical and storage characteristics of an index. Use the following options to assign physical properties:
- Parallel Type
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Specifies whether you want to create indexes in parallel. The PARALLEL option is disabled when using a global temporary table. If you select this option, enter a value in the text box.
- REVERSE
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Specifies that the bytes of the index block, excluding the rowid, are stored in reverse order. This option is not valid for a Bitmap index or for an index organized table.
- ONLINE
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Specifies that DML operations can be executed on the table when the index is being created.
- COMPUTE STATISTICS
- Compress Type
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Specifies whether to use key compression. If you select the COMPRESS option, enter a value in the text box. This option is not available for a Bitmap index.
- Sort Type
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Specifies whether you want to sort indexes in ascending order. The NOSORT option is not available for a Bitmap index. You cannot select the SORT option when the ONLINE option is selected.
- Visible Type
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Specifies whether the index is visible to the optimizer.
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