Question

Android SQLite ON UPDATE CASCADE无法正常工作
请帮帮我这些是我的表

    String tablausuariocreate="CREATE TABLE IF  NOT EXISTS USUARIO(" +
            "idusuario INTEGER PRIMARY KEY NOT NULL," +
            "DELETED BOOLEAN DEFAULT(0))";

   String tablazonacreate="CREATE TABLE IF  NOT EXISTS ZONA(" +
        "IDZ INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL," +
        "NAME VARCHAR(150)," +
        "idusuario integer," +
        "DELETED BOOLEAN DEFAULT(0)," +
        "FOREIGN KEY(idusuario) REFERENCES USUARIO(idusuario) on update cascade)";

 String tablaclientecreate = "CREATE TABLE IF  NOT EXISTS CLIENTE(" +
        "IDC INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL," +
        "NAME VARCHAR(50) UNIQUE," +
        "IDZ INTEGER," +
        "idusuario integer," +
        "DELETED BOOLEAN DEFAULT(0)," +
        "FOREIGN KEY(IDZ) REFERENCES ZONA(IDZ) on delete set null on update cascade," +
        "FOREIGN KEY(idusuario) REFERENCES USUARIO(idusuario) on update cascade )";

Answer 1

在这一行中，您设置了外键，在删除时设置为null，而不是级联：

"FOREIGN KEY(IDZ) REFERENCES ZONA(IDZ) on delete set null on update cascade,"

您应该将其设置为on delete cascade。您可能还需要重新创建要应用更改的表（删除IF NOT EXISTS条件）。

Android SQLite＆＃34;在UPDATE级联＆＃34;不工作

1 个答案: