When you drop an index, Oracle Database invalidates all objects that depend on the underlying table, including views, packages, package bodies, functions, and procedures.
When you drop a global partitioned index, a range-partitioned index, or a hash-partitioned index, all the index partitions are also dropped. If you drop a composite-partitioned index, then all the index partitions and subpartitions are also dropped.
In addition, when you drop a domain index:
Oracle Database invokes the appropriate routine.
If any statistics are associated with the domain index, then Oracle Database disassociates the statistics types with the
FORCE clause and removes the user-defined statistics collected with the statistics type.
Oracle Database Data Cartridge Developer's Guide for information on the routines
domain_index_clause of CREATE INDEX for more information on domain indexes
The index must be in your own schema or you must have the
INDEX system privilege.
Specify the schema containing the index. If you omit
schema, then Oracle Database assumes the index is in your own schema.
Specify the name of the index to be dropped. When the index is dropped, all data blocks allocated to the index are returned to the tablespace that contained the index.
FORCE applies only to domain indexes. This clause drops the domain index even if the indextype routine invocation returns an error or the index is marked
FORCE, you cannot drop a domain index if its indextype routine invocation returns an error or the index is marked
Dropping an Index: Example This statement drops an index named
ord_customer_ix_demo, which was created in "Compressing an Index: Example":
DROP INDEX ord_customer_ix_demo;