In this post, you’ll learn more about the Oracle ErrorORA-14646: Specified alter table operation involving compression cannot be performed in the presence of usable bitmap indexes with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-14646: Specified alter table operation involving compression cannot be performed in the presence of usable bitmap indexes
Reason for the Error ORA-14646: Specified alter table operation involving compression cannot be performed in the presence of usable bitmap indexes
The first time a table is altered to include compression, it cannot have a usable bitmap index (partition). Subsequent alter table statements involving compression do not have this same restriction.
How to fix the Error ORA-14646: Specified alter table operation involving compression cannot be performed in the presence of usable bitmap indexes ?
You can fix this error in Oracle by following the below steps
A) Drop any bitmap indexes defined on the table, and re-create them once the operation is complete or, B) Mark all index fragments of all bitmap indexes defined on the table UNUSABLE and rebuild them once the operation is complete.