Oracle 通过 ROWID 批量更新表的方法

DECLARE                                                               
   maxrows      number default 5000;                                                
   row_id_table dbms_sql.Urowid_Table;                                                                                                
   cursor acnt_first_cur is                                                         
     SELECT /*+parallel(h,8) */h.rowid from   pos5g_rw.mstb_order_header h order by h.rowid;                                                         
 begin                                                                              
   open acnt_first_cur;                                                             
   loop                                                                             
     exit when acnt_first_cur%notfound;                                             
     fetch acnt_first_cur bulk collect                                              
       into row_id_table limit maxrows;                                     
     forall i in 1 .. row_id_table.count                                            
       update pos5g_rw.mstb_order_header h  set name=null where rowid = row_id_table(i);                                              
     commit;                                                                        
   end loop;                                                                        
 end;                                                                               
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