How do I remove synonyms in Oracle?
How do I remove synonyms in Oracle?
Use the DROP SYNONYM statement to remove a synonym from the database or to change the definition of a synonym by dropping and re-creating it. To drop a private synonym, either the synonym must be in your own schema or you must have the DROP ANY SYNONYM system privilege.
Can we drop a synonym in Oracle?
The syntax to drop a synonym in Oracle is: DROP [PUBLIC] SYNONYM [schema .] synonym_name [force]; PUBLIC.
What happens to synonym when table is dropped in Oracle?
All synonyms for a dropped table remain, but return an error when used. All extents allocated for a table that is dropped are returned to the free space of the tablespace and can be used by any other object requiring new extents or new objects.
How can I drop multiple synonyms in Oracle?
In this syntax:
- First, specify the name of the synonym that you want to remove after the DROP SYNONYM keyword. If the synonym belongs to a schema, you must specify its schema name.
- Second, use the FORCE keyword to delete the synonym even if it has dependent tables or user-defined types.
How do you resolve a looping chain of synonyms?
ORA-01775: looping chain of synonyms – Basically means that you created a synonym that points to another object in a circle. In order to fix the above problem you need to have one of the synonyms in the chain point to an object like below. SQL> drop synonym s3; Synonym dropped.
Does drop table drop synonym?
If DROP TABLE statement is used with a synonym name, both the synonym and the table identified by the synonym are dropped along with any other synonyms that reference the same table. You can prevent users from specifying a synonym in DROP TABLE statements by setting the USETABLENAME environment variable.
How do I drop a private synonym in another user’s schema?
DROP ANY SYNONYM system privilege – Drop private synonym in another users schema – Oracle
- a. DROP SYNONYM.
- b. DROP ANY SYNONYM.
- c. DROP PUBLIC SYNONYM.
- d. All mentioned above.
Does DROP TABLE remove indexes?
DROP TABLE always removes any indexes, rules, triggers, and constraints that exist for the target table. However, to drop a table that is referenced by a view or a foreign-key constraint of another table, CASCADE must be specified.
Do we need to drop index before dropping table?
Yes, it does. However, if you have foreign key constraints such as RESTRICT that ensure referential integrity with other tables, you’ll want to drop those keys prior to dropping or truncating a table.
