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Oracle skip_unusable_indexes

Oracle  skip_unusable_indexes

Parameter type – Boolean

Default value – True

Modifiable – ALTER SESSION, ALTER SYSTEM

Range of values – True | False

The skip_unusable_indexes enables or disables the use and reporting of tables with unusable indexes or index partitions.

Values:

• True – Disables error reporting of indexes and index partitions marked UNUSABLE. This setting allows all operations (inserts, deletes, updates, and selects) on tables with unusable indexes or index partitions. Note: If an index is used to enforce a UNIQUE constraint on a table, then allowing insert and update operations on the table might violate the constraint. Therefore, this setting does not disable error reporting for unusable indexes that are unique.
   

• False – Enables error reporting of indexes marked UNUSABLE. This setting does not allow inserts, deletes, and updates on tables with unusable indexes or index partitions.

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