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oracleoracle11gdatabase-link

How to drop table with dblink


How to drop a table if it exist in oracle with dbLink?I am here trying to connect to remote database using DBLink in oracle.I am using oracle sql developer.

DROP TABLE TableName@dbLinkName. This gives me error Unknown Command.

begin declare
    v_mytableobject_id
        NUMBER(10);
SELECT
    object_id INTO v_mytableobject_id FROM    user_objects@dblink
WHERE
    object_name = 'MYTABLE';

IF v_mytableobject_id IS NOT NULL THEN
    dbms_utility.exec_ddl_statement@dblink ( 'drop table MYTABLE' );
ELSE
    dbms_utility.exec_ddl_statement@dblink ( 'CREATE TABLE MYTABLE
   (ID NUMBER(5,0) GENERATED ALWAYS AS IDENTITY MINVALUE 1 MAXVALUE 9999999999999999999999999999 INCREMENT BY 1 START WITH 1 CACHE 20 NOORDER  NOCYCLE  NOKEEP  NOSCALE , 
    CODE NVARCHAR2(15), 
    DESCRIPTION NVARCHAR2(125)
    
   )'
    );
    dbms_utility.exec_ddl_statement@dblink ( 'CREATE UNIQUE INDEX MYTABLE_PK ON MYTABLE (ID) 
  PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS 
  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1
  BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)'
    );
END IF;

end; 

Solution

  • You can't drop table just like that:

    SQL> drop table test@dbl_mike;
    drop table test@dbl_mike
                    *
    ERROR at line 1:
    ORA-02021: DDL operations are not allowed on a remote database
    

    There's a workaround, though:

    SQL> begin
      2    dbms_utility.exec_ddl_statement@dbl_mike('drop table test');
      3  end;
      4  /
    
    PL/SQL procedure successfully completed.
    
    SQL>