You might drop a custom index preference when you no longer need it for indexing.
You drop index preferences with the procedure CTX_DDL.DROP_PREFERENCE
.
Dropping a preference does not affect the index created from the preference.
Oracle Text Reference to learn more about the syntax for the CTX_DDL.DROP_PREFERENCE
procedure
Example: Dropping a Preference
The following code drops the preference my_lexer
.
begin ctx_ddl.drop_preference('my_lexer'); end;