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我有一个场景，我需要使用一个包计算雇员工资，如果有一些预付款，它会给我永久雇员的剩余工资，然后使用另一个包将计算值转换为员工指定的货币。

我一直在这样做是：

CASE
  WHEN ( ai.employee_type = 'PERMANENT' and ai.payment_status_flag='Y')
  THEN EMP_UTILS_PKG.get_pay_amount_remaining( ai.employee_id )
  ELSE ail.amount_remaining
END amount_remaining,
CASE
  WHEN ( ai.salary_currency_code = NVL(find_currency('EMP_COMMON_CURRENCY'),ai.EMP_CURRENCY_CODE))
  THEN CASE
             WHEN ( ai.employee_type = 'PERMANENT' and ai.payment_status_flag='Y')
                THEN EMP_UTILS_PKG.get_pay_amount_remaining( ai.employee_id )
             ELSE ail.amount_remaining
  END
  ELSE EMP_API.convert_closest_amount_sql( x_from_currency => ai.EMP_CURRENCY_CODE ,x_to_currency => find_currency('EMP_COMMON_CURRENCY') ,x_amount =>( CASE
             WHEN ( ai.employee_type = 'PERMANENT' and ai.payment_status_flag='Y')
                THEN EMP_UTILS_PKG.get_pay_amount_remaining( ai.employee_id )
             ELSE ail.amount_remaining
END) ,x_max_roll_days => -1)
END EMP_CONVERTED_AMOUNT_REMAINING,

我在查询中重复了以下条件 3 次：

WHEN ( ai.employee_type = 'PERMANENT' and ai.payment_status_flag='Y')
   THEN EMP_UTILS_PKG.get_pay_amount_remaining( ai.employee_id )
   ELSE ail.amount_remaining

有没有更简单的方法，我们可以避免重复这样的代码吗？

4

2 回答 2

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FROM您可以在子句中使用内联视图来简化这一点。在您的实时代码中正确使用连接。

SELECT amount_remaining
     , CASE
          WHEN ai.salary_currency_code = NVL(find_currency('EMP_COMMON_CURRENCY')
                                            ,ai.EMP_CURRENCY_CODE)
               THEN amount_remaining

          ELSE EMP_API.convert_closest_amount_sql(
                   x_from_currency => ai.EMP_CURRENCY_CODE
                  ,x_to_currency => find_currency('EMP_COMMON_CURRENCY')
                  ,x_amount => amount_remaining
                  ,x_max_roll_days => -1)
        END EMP_CONVERTED_AMOUNT_REMAINING,
FROM (SELECT CASE
               WHEN ai.employee_type = 'PERMANENT'
                AND ai.payment_status_flag='Y'
                    THEN EMP_UTILS_PKG.get_pay_amount_remaining( ai.employee_id )
               ELSE ail.amount_remaining
             END amount_remaining
        FROM table_name);
于 2013-03-20T11:22:58.767 回答
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You already use the function EMP_UTILS_PKG.get_pay_amount_remaining so why not create a PL/SQL function that encapsulates the logic and just call that in your multiple places.

于 2013-03-20T11:36:24.097 回答