避免使用触发器和 raise_application_error 将数据插入 table，而是将数据存储到日志 table

Question

我需要检查产品销售是否已过期，将其日期与计算机的实际日期进行比较。如果产品过期，那么我无法将产品数据插入订单 Table，但我需要将它们插入日志 Table。我可以避免使用 raise_application_error (-20001,'This product is not for sale anymore'); 插入订单 Table。但是当我使用 raise_application_error 时，似乎 raise_application_error 回滚命令 INSERT INTO LogTable ...，它在触发器内。有没有更好的方法来解决这个问题而不使用 raise_application_error？观察：我需要使用 Trigger 而不能使用 INSTEAD-OF

create or replace TRIGGER Insercao_DetalhesPedido
    AFTER INSERT ON DetalhesPedido
    REFERENCING new AS novo_DP
    FOR EACH ROW

  DECLARE
    dataPedido Pedido.DTPedido%TYPE;
    dataVenda Produto.DTFimVenda%TYPE;
    dtVenda_Expirou EXCEPTION;

  BEGIN
    -- get the date from the order(it is a SYSDATE)
    SELECT DTPedido INTO dataPedido
    FROM Pedido 
    WHERE Pedido.codigo = :novo_DP.codigoPedido;

    -- get the date from the product(when it will expire)
    SELECT DTFimVenda INTO dataVenda
    FROM Produto
    WHERE Produto.codigo = :novo_DP.codigoProduto;

    --has the product expired?
    IF dataVenda < dataPedido THEN 
    -- Insert INTO the log table saying that this product have expired
      INSERT INTO Log
      VALUES(:novo_DP.codigoPedido, :novo_DP.codigoProduto, cast(SYSDATE as timestamp), dataPedido, 
             'Insercao Falha. DTVenda('||dataVenda||') < DataPedido('||dataPedido||')');
      RAISE dtVenda_Expirou;
    ELSE
      -- Insert INTO the log table saying that the product was succesfully inserted
       INSERT INTO Log
       VALUES(:novo_DP.codigoPedido, :novo_DP.codigoProduto, cast(SYSDATE as timestamp), dataPedido, 
             'Inserção De Produto em DetalhesPedido com sucesso');
    END IF;  

  EXCEPTION
  -- Product expired
  WHEN dtVenda_Expirou THEN
      raise_application_error (-20001,'A DATA DE VENDA DO PRODUTO EXPIROU');
  -- Order number not found
  WHEN NO_DATA_FOUND THEN
    raise_application_error (-20001,'NUMERO DO PEDIDO NÃO EXISTE');

END Insercao_DetalhesPedido;

因为我的代码是葡萄牙语，所以我用英语写了一些评论

Answer 1

你需要在这里使用Autonomous Pragma。它将确保父事务不会回滚子事务。这是登录 sql 和 pl/sql.

的标准做法

请在此处查看示例：http://www.java2s.com/Tutorial/Oracle/0560__Trigger/Autonomoustriggers.htm

编辑：

我的建议是创建一个单独的 pl/sql proc，使用 Autonomous pragma 插入日志 table 并在需要时调用此 proc。这将确保日志语句不会回滚。

Answer 2

您可以使用 Autonomous Pragma 来记录您的数据，无论异常如何。基本上，您创建一个过程以插入日志 table。该过程的语法可以是：

CREATE OR REPLACE PROCEDURE auto_log(your parameters) is
....
PRAGMA AUTONOMOUS TRANSACTION;   --This statement makes the procedure autonomous
BEGIN
--your insert into log statement
COMMIT;
EXCEPTION WHEN OTHERS THEN
ROLLBACK;
END;
/

您的触发器将类似于：

....
--has the product expired?
IF dataVenda < dataPedido THEN 
-- Insert INTO the log table saying that this product have expired
   auto_log(your parameters)  --- call the procedure
   RAISE dtVenda_Expirou;
ELSE
  -- Insert INTO the log table saying that the product was succesfully inserted
  auto_log(your parameters)  --- call the procedure
END IF;  

EXCEPTION
-- Product expired
WHEN dtVenda_Expirou THEN
    raise_application_error (-20001,'A DATA DE VENDA DO PRODUTO EXPIROU');
-- Order number not found
WHEN NO_DATA_FOUND THEN
  raise_application_error (-20001,'NUMERO DO PEDIDO NÃO EXISTE');

END Insercao_DetalhesPedido;

见here

避免使用触发器和 raise_application_error 将数据插入 table，而是将数据存储到日志 table

Avoid inserting data into a table using Trigger and raise_application_error, but store the data into a Log table

oracle

logging

triggers

plsql

insert