View the Exhibit and examine the parameters. User A executes the following command to update the TRANStable: SQL> UPDATE B.trans SET tr_amt=tr_amt+500 WHERE c_code=’C005’; Before user A issues a COMMIT orROLLBACK command, user B executes the following command on the TRANS table: SQL> ALTER TABLE trans MODIFY (tr_type VARCHAR2(3)); What would happen in this scenario()
- A、The ALTER TABLE command modifies the column successfully.
- B、The DDL operation gets higher priority and transaction for user A is rolled back.
- C、The ALTER TABLE command waits indefinitely until user A ends the transaction.
- D、The ALTER TABLE command fails after waiting for 60 seconds due to the resource being busy
正确答案:D
答案解析:有
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