Question

所以我试图构建一个触发器来维护两个表之间的数据一致性。我理想的触发器看起来应该是这样的（它可能不正确，我还没能正确调试它）：

    CREATE OR REPLACE TRIGGER salesFragmentGreaterThan
AFTER INSERT OR UPDATE OR DELETE ON sales
FOR EACH ROW WHEN (sale_price >= 5000000)
DECLARE
BEGIN
IF INSERTING THEN
    INSERT INTO greaterThanFiveMillionFragment 
        VALUES (sales_seq.curval, :NEW.sales_date, :NEW.sale_type, :NEW.reserved_price, :NEW.sale_price, :NEW.deposit, 
            :NEW.balance, :NEW.buyer_id, :NEW.property_id);

ELSEIF DELETING THEN
    DELETE FROM greaterThanFiveMillionFragment
        WHERE greaterThanFiveMillionFragment.sales_id = :new.sales_id;

ELSEIF UPDATING THEN
    UPDATE greaterThanFiveMillionFragment
        SET :old.sales_date = :new.sales_date, :old.sale_type = :new.sale_type, :old.reserved_price = :new.reserved_price, :old.sale_price = :new.sale_price,
            :old.deposit = :new.deposit, :old.balance = :new.balance, :old.buyer_id = :new.buyer_id, :old.property_id = :new.property_id
                WHERE :old.sales_id = :newsales_id;
END IF;
/

这会抛出一系列无效的sql语句错误。我开始删除代码，找出导致这个问题的部分，直到我做到这一点：

CREATE OR REPLACE TRIGGER salesFragmentGreaterThan
AFTER INSERT OR UPDATE OR DELETE ON sales
FOR EACH ROW 
WHEN (new.sale_price >= 5000000)
DECLARE
BEGIN
select sales_id from sales;
END;
/

这会抛出无效的sql错误。我可以获得编译触发器的唯一方法是在BEGIN - END块内部没有任何内容。

我做错了什么？

此问题已标记为重复，我已被定向到此处： Declaring a variable and setting its value from a SELECT query in Oracle

恐怕我不明白这个问题是如何与我的相关的。我遇到的问题是，如果没有编译器将其声明为无效的SQL语句，我似乎无法在我的BEGIN块中放入任何代码。

Oracle Trigger导致无效的sql语句错误

0 个答案: