任何關鍵字跳過DB2觸發器中的當前行

Question

如果不存在，我必須編寫觸發器以將數據插入到數據庫中。 我寫了，直到插入記錄。我正在做信號，如果數據存在哪些 是失敗我的整批記錄。

My questions: Is there any keyword which will skip/ignore/discard the current row? 
    My trigger is below. I want to remove signal and keep something else which will 
    discard/ignore/skip the current row insertion. For example : Continue keyword in JAVA . 

    CREATE OR REPLACE TRIGGER tri_books_edit 
    NO CASCADE BEFORE INSERT ON books 
    REFERENCING NEW AS N 
    FOR EACH ROW 
    WHEN ((select count(*) from books where book_name = N.book_name and author = N.Author) > 0) 
    SIGNAL SQLSTATE '75000' SET MESSAGE_TEXT = 'Duplicate row with same name and author' 

    Thanks for your help 

Answer 1

您不需要爲此使用觸發器。只需在兩個字段中添加唯一索引：

create unique index books_name_author on books(book_name, author); 

更簡單的防止重複的解決方案。