创建触发器

Question

我有这个触发器

procedure CASE_A  
as  
UPDATE table1 SET field1 = (SELECT bus FROM view1 WHERE table1.document = view1.document)  
end;

下面的触发器应该执行上面的过程CASE_A（Case_A应该将值放入field1）

CREATE OR REPLACE TRIGGER "CASE_A" AFTER INSERT ON "TABLE1" FOR EACH ROW  
BEGIN  
CASE_A;
END;

但是，它没有这样做。

Answer 1

你做错了，至少假设这是甲骨文。

最好这样做：

CREATE OR REPLACE TRIGGER "CASE_A" BEFORE INSERT ON "TABLE1" FOR EACH ROW  
BEGIN  
    SELECT bus INTO :new.field1 FROM view1 WHERE :new.document = view1.document;
END;

编辑：由于view1依赖于table1，我们需要做更多...（阅读评论以获取更多信息）

CREATE OR REPLACE TRIGGER "CASE_A" BEFORE INSERT ON "TABLE1" FOR EACH ROW  
BEGIN  
    SELECT sum(FUNCTION_CASEA(b.DUE, b.RETD)) INTO :new.field1
      FROM table2
      WHERE table1.document = table2.document 
        AND table1.field1 = table2.branch;
END;