ORA-14646: Specified alter table operation involving
compression cannot be performed in the presence of usable
Answer / guest
Cause: 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.
Action: 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.
Please add more information about this Error
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