Java程序不檢查SQLite約束？

Question

Java程序不檢查SQLite約束？

我有以下表結構和內容

create table Parent 
(
ParentID int primary key, 
ParentName varchar(30) 
) 
create table child 
(
ChildID int primary key, 
ParentID int references Parent, 
ChildName varchar(30) 
) 
insert into Parent values(1,'a'); 
insert into Parent values(2,'b') 
insert into Child values(1,1,'c'); 
insert into Child values(2,1,'d'); 
insert into Child values(3,1,'e'); 
insert into Child values(4,1,'f'); 

---

import java.sql.Connection; 
import java.sql.DriverManager; 
import java.sql.ResultSet; 
import java.sql.SQLException; 
import java.sql.Statement; 
import java.util.List; 

public class LiteConn { 
    public static void main(String[] args) throws SQLException { 
     // TODO Auto-generated method stub 
     Connection con=null; 
     Statement st=null; 
     ResultSet rs=null; 
     try { 
      Class.forName("org.sqlite.JDBC"); 
      con= DriverManager.getConnection("jdbc:sqlite:C:\\Users\\chaitanya\\Documents\\Demo.db"); 
      st = con.createStatement(); 
      int i=st.executeUpdate("delete from Parent where ParentID=1 "); 
      System.out.println("i "+i); 
     } catch (SQLException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
      System.out.println(e.getMessage()); 
     } 
     catch(ClassNotFoundException e1) 
     { 
      System.out.println(e1.getMessage()); 
     } 
     finally { 
      con.close(); 
     } 

    } 

} 

** SQLite的IDE不允許觸發此查詢，但是當我試圖通過這個Java程序，這個查詢執行。
（此刪除查詢試圖刪除父行....）**

Answer 1

您必須enable foreign key support。