DBMS LOB.SUBSTR Throwing ORA-00904: Invalid Identifier Error

问题

One of our cutomer is running the scripts in oracle sql developer to upgrade his database table structure, procudere & triggers etc. But while running the script, he is getting ORA-00904: Invalid Identifier Error for DBMS_LOB.SUBSTR() and DBMS_LOB.GETLENGTH() in one procedure.

Can somebody tell why is happening so?

There are using Oracle Sql developer Version 3.1.07 Build MAIN-07.42 with Oracle 11g.

回答1:

I imagine 3 possible reasons:

1. the user lacks execute privilege on sys.dbms_lob (although the privilege is granted to PUBLIC by default)
2. there is no synonym dbms_lob for sys.dbms_lob in the database (although such public synonym should exist)
3. the schema, on which the customer works, contains some other package with the same name DBMS_LOB

回答2:

Run this sql with sys to check whether your schema has privilege to execute DBMS_LOB.

select * from dba_tab_privs where table_name='DBMS_LOB';

By default, you should see PUBLIC in the grantees.

If not, you can run sql with sys.

grant execute on sys.DBMS_LOB to public;

or

grant execute on sys.DBMS_LOB to <your_schema_name>

来源：https://stackoverflow.com/questions/10118994/dbms-lob-substr-throwing-ora-00904-invalid-identifier-error