What is a synonym in DB?
What is a synonym in DB?
In databases, a synonym is an alias or alternate name for a table, view, sequence, or other schema object. They are used mainly to make it easy for users to access database objects owned by other users. When an application uses a synonym, the DBMS forwards the request to the synonym’s underlying base object.
What is Oracle database synonym?
A synonym is an alternative name for objects such as tables, views, sequences, stored procedures, and other database objects. You generally use synonyms when you are granting access to an object from another schema and you don’t want the users to have to worry about knowing which schema owns the object.
What are synonyms in SQL?
A synonym is a database object that serves the following purposes: Provides an alternative name for another database object, referred to as the base object, that can exist on a local or remote server.
How do I recreate a synonym in Oracle?
Oracle CREATE SYNONYM
- First, specify the name of the synonym and its schema.
- Second, specify the object for which you want to create the synonym after the FOR keyword.
- Third, use the OR REPLACE option if you want to re-create the synonym if it already exists.
Which keyword is the synonym for database?
Which keyword is the synonym for DATABASE? Explanation: In any statement where the word ‘DATABASE’ occurs, the keyword ‘SCHEMA’ can be used as a synonym in place of it. In the literal sense, SCHEMA refers to the structure of the database.
Why are synonyms important in a database?
Synonyms are useful in simplifying complicated and lengthy object names by providing short and friendly alternative names for these database objects. You can benefit from Synonyms by providing backward compatibility for the database objects that are used by legacy systems in case you drop or rename that objects.
How do I validate synonyms in Oracle?
Use the ALTER SYNONYM statement to modify an existing synonym. To modify a private synonym in another user’s schema, you must have the CREATE ANY SYNONYM and DROP ANY SYNONYM system privileges. To modify a PUBLIC synonym, you must have the CREATE PUBLIC SYNONYM and DROP PUBLIC SYNONYM system privileges.
What is Editionable synonym in Oracle?
[ EDITIONABLE | NONEDITIONABLE ] Use these clauses to specify whether the synonym is an editioned or noneditioned object if editioning is enabled for the schema object type SYNONYM in schema . For private synonyms, the default is EDITIONABLE . For public synonyms, the default is NONEDITIONABLE .
What is false for synonym in SQL?
It means that you can not create SYNONYM of a SYNONYM. Obviously consumes possible object names, as you can not create a table with the same name of a synonym. The object for which the SYNONYM is being created is checked at run time.
What is create synonym in SQL?
Purpose. Use the CREATE SYNONYM statement to create a synonym, which is an alternative name for a table, view, sequence, procedure, stored function, package, materialized view, Java class schema object, user-defined object type, or another synonym.
Why is Oracle Ora 00980 synonym translation no longer valid?
I’ve got a synonym on a remote Oracle database that I can access in SQL over a database link, eg, If I put the above statement into a PLSQL block, it won’t compile, giving the error message “ORA-00980: synonym translation is no longer valid”.
How to fix synonym translation is no longer valid?
I am working as a oracle apps technical consultant.Recently i am getting one error.i.e,ora-00980:synonym translation is no longer valid. ora-00980:synonym translation is no longer valid. How is it possible for drop a interface table? Please tell me the solution?.
Why is my synonym not valid in PLSQL?
When using dynamic SQL the database link is not resolved at compile time but at runtime. Workaround solution is to use an Oracle view instead. Check in remote database grants for “my_synonym” must be almost “select” for the user you use in connect string, check also the object which this synonym points at (maybe someone deleted the table).
Can a synonym point to a versioned object?
The synonym is not versioned but specifies a versioned // target object. // *Action: Change the synonym definition so that the synonym points at // a legal target object. work with your DBA – someone dropped something – nothing I can do sitting here – something your DBA is going to have to remedy.