小编kor*_*efn的帖子

我有一个大表,希望迭代记录(> 1,000,000),根据另外2组每个表> = 1执行一些检查,并将结果输出到文本文件.

执行此操作的PL\SQL需要几个小时,我可以对其进行优化,或者我可以将其重写为可并行化的clojure程序,因为只有选择而且没有写入(对表).

问题:1优化PL/SQL有哪些挑战/限制？

2在优化PL/SQL方面,将代码迁移到clojure是否有重大的优势？

编辑 这是它的肉

  OPEN cur;

  LOOP
     FETCH cur INTO l_cur;

     EXIT WHEN cur%NOTFOUND;

     SELECT NVL (dUM ( (total - total_old)), 0),
            NVL (dUM ( (new - old)), 0)
       INTO li_debt, li_debt
       FROM tbl1
      WHERE     accounting_date = l_cur.accounting_date
            AND USER_ID = l_cur.USER_ID
            AND USER_ACCOUNT = l_cur.USER_ACCOUNT;

     SELECT NVL (
               dUM (
                  DECODE (a.DEBITS,
                          'foo', ABS (amount),
                          ABS (amount) * -1)),
               0)
               amount
       INTO li_dad_bill
       FROM daily_trandactiond d, ACCOUNTS a
      WHERE     d.USER_ID = l_cur.USER_ID
            AND d.USER_ACCOUNT …

我试图拆分,name但没有使用拆分方法的尝试工作

public void insertUpdate(DocumentEvent e) {
   String name="PU_Y"+
               "PU-x"+
               "Pu-z";

    split = name.split("\\r\\n");
    split = name.split("\r\n");
    split = name.split("[\r\n]+");
    split = name.split("[\\r\\n]+");
    split = name.split("\\r?\\n");
    // I tried using all the above to split above string but was not successful
}

请帮助分割这个字符串