Question

我正在尝试创建一个在其数据库上使用触发器的应用。每当我尝试在Android Studio上运行它时，应用程序运行良好，代码中没有错误。但是当我尝试在MEmu或Lollipop手机上运行时，它会向我显示一些错误消息。我已经尝试修复它，但是当我尝试在修复后启动它时，会出现此消息。

java.lang.RuntimeException：无法启动活动ComponentInfo {com.dexpensemanager / com.dexpensemanager.Home}：android.database.sqlite.SQLiteException：触发器中的INSERT，UPDATE和DELETE语句不允许使用限定的表名（代码1）:,编译时：如果不存在，则创建TRIGGER。当TRANS.type =收入和strftime（＆＃39;％Y＆＃39; - ＆＃39;％m＆＃39; ，＆＃39;现在＆＃39;，＆＃39;月初＆＃39;）BEGIN插入到SUMTRANS.income SELECT SUM（income）FROM TRANS.amount END; 在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2460）在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2522）在android.app.ActivityThread.access $ 800（ActivityThread.java:169）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1421）在android.os.Handler.dispatchMessage（Handler.java:111）在android.os.Looper.loop（Looper.java:194）在android.app.ActivityThread.main（ActivityThread.java:5546） at java.lang.reflect.Method.invoke（Native Method）在java.lang.reflect.Method.invoke（Method.java:372）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:967）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:762）引起：android.database.sqlite.SQLiteException：触发器中的INSERT，UPDATE和DELETE语句不允许使用限定的表名（代码1）:,编译时：如果不存在，则创建TRIGGER sumcalc_income在每次行转换后插入TRANS.type =收入和strftime（＆＃39;％Y＆＃39; - ＆＃39;％m＆＃39;，＆＃39;现在＆＃39;，＆＃39;月初＆＃39;）BEGIN insert进入SUMTRANS.income SELECT SUM（income）FROM TRANS.amount END; 在android.database.sqlite.SQLiteConnection.nativePrepareStatement（本机方法）在android.database.sqlite.SQLiteConnection.acquirePreparedStatement（SQLiteConnection.java:898）在android.database.sqlite.SQLiteConnection.prepare（SQLiteConnection.java:509）在android.database.sqlite.SQLiteSession.prepare（SQLiteSession.java:588）在android.database.sqlite.SQLiteProgram。（SQLiteProgram.java:58）在android.database.sqlite.SQLiteStatement。（SQLiteStatement.java:31）在android.database.sqlite.SQLiteDatabase.executeSql（SQLiteDatabase.java:1704）在android.database.sqlite.SQLiteDatabase.execSQL（SQLiteDatabase.java:1635）在com.example.connectionDB.DBnTrigger.onCreate（DBnTrigger.java:45）在android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked（SQLiteOpenHelper.java:251）在android.database.sqlite.SQLiteOpenHelper.getWritableDatabase（SQLiteOpenHelper.java:163）在com.example.connectionDB.DBnTrigger.getLastIncome（DBnTrigger.java:459）在com.dexpensemanager.Home.onCreate（Home.java:61）在android.app.Activity.performCreate（Activity.java:5975）在android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1111）在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2413） ......还有10个

以及我的触发器的代码，我从create trigger参考

获取它

public String insincTrigger() {
    String insinc = "CREATE TRIGGER if not exists sumcalc_income "
            + " AFTER INSERT "
            + " ON "+TRANSACTION_TABLE
            + " FOR  EACH  ROW "
            + " WHEN "
            + " TRANS.type= income "
            + " AND  strftime ('%Y'-'%m','now','start of month') "
            + " BEGIN "
            + " insert into SUMTRANS.income "
            + " SELECT SUM(income) FROM TRANS.amount "
            + " END; ";

    return insinc;
}

public String insexpTrigger(){
    String insexp = "CREATE TRIGGER if not exists sumcalc_expense "
            + " AFTER INSERT "
            + " ON "+TRANSACTION_TABLE
            + " FOR  EACH  ROW "
            + " WHEN "
            + " TRANS.type= expense "
            + " WHERE  strftime ('%Y'-'%m','now','start of month') "
            + " BEGIN "
            + " insert into SUMTRANS.expense "
            + " SELECT SUM(expense) FROM TRANS.amount "
            + " END; ";
    return insexp;
}

public String upincTrigger(){
    String upinc = "CREATE TRIGGER if not exists usumcalc_income "
            + " AFTER UPDATE "
            + " OF [amount] "
            + " ON "+TRANSACTION_TABLE
            + " FOR  EACH  ROW "
            + " WHEN "
            + " TRANS.type= income "
            + " WHERE  strftime ('%Y'-'%m','now','start of month') "
            + " BEGIN "
            + " UPDATE OR REPLACE "+TRANSACTION_SUM
            + " SET [income] = SELECT SUM(income) from TRANS.amount "
            + " END; ";
    return upinc;
}

public String upexpTrigger() {
    String upexp = "CREATE TRIGGER if not exists usumcalc_expense "
            + " AFTER UPDATE "
            + " OF [amount] "
            + " ON "+TRANSACTION_TABLE
            + " FOR  EACH  ROW "
            + " WHEN "
            + " TRANS.type= expense "
            + " WHERE  strftime ('%Y'-'%m','now','start of month') "
            + " BEGIN "
            + " UPDATE OR REPLACE "+TRANSACTION_SUM
            + " SET [expense] = SELECT SUM(expense) from TRANS.amount "
            + " END; ";
    return upexp;
}

public String delTrigger(){
    String del = "CREATE TRIGGER if not exists sumcalc_delete "
            + " AFTER DELETE "
            + " ON "+TRANSACTION_TABLE
            + " FOR  EACH  ROW "
            + " WHEN "
            + " TRANS.type = income AND expense "
            + " WHERE  strftime ('%Y'-'%m','now','start of month') "
            + " BEGIN "
            + " DELETE FROM "+TRANSACTION_SUM
            + " WHERE = SELECT SUM(income AND expense) from TRANS.amount "
            + " END; ";
    return del;
}

public String instimeTrigger(){
    String instime = "CREATE TRIGGER if not exists sumcalc_instime "
            + " AFTER INSERT "
            + " ON "+TRANSACTION_SUM
            + " FOR  EACH  ROW "
            + " BEGIN "
            + " insert into SUMTRANS.month "
            + " VALUES ('%Y'-'%m','now','start of month') "
            + " END;";
    return instime;
}

public String deltimeTrigger(){
    String deltime = "CREATE TRIGGER if not exists sumcalc_instime "
            + " AFTER DELETE "
            + " ON "+TRANSACTION_SUM
            + " FOR  EACH  ROW "
            + " BEGIN "
            + " DELETE FROM SUMTRANS.month "
            + " END; ";
    return deltime;
}

有人可以告诉我该怎么办？

感谢。

Answer 1

异常堆栈显然是在说明问题：

android.database.sqlite.SQLiteException: qualified table names are not allowed on
INSERT, UPDATE, and DELETE statements within triggers (code 1)

来自问题中的链接SQLite docs（强调我的）：

触发器中的UPDATE，DELETE和INSERT语句的语法限制

触发器中的UPDATE，DELETE和INSERT语句不支持UPDATE，DELETE和INSERT语句的完整语法。以下限制适用：



要在UPDATE，DELETE或INSERT中修改的表的名称   语句必须是不合格的表名。换句话说，必须   只使用＆＃34; tablename＆＃34;不是＆＃34; database.tablename＆＃34;在指定时   表。要修改的表必须存在于同一数据库中   触发器附加到的表或视图。



＆＃34; INSERT INTO表DEFAULT VALUES＆＃34; INSERT语句的形式   不受支持。



UPDATE不支持INDEXED BY和NOT INDEXED子句   和DELETE语句。



UPDATE和DELETE语句的ORDER BY和LIMIT子句是   不支持。通常不支持ORDER BY和LIMIT   在任何上下文中更新或删除，但可以为顶级启用   使用SQLITE_ENABLE_UPDATE_DELETE_LIMIT编译时的语句   选项。但是，该编译时选项仅适用于顶级   UPDATE和DELETE语句，而不是UPDATE和DELETE语句   触发器。



内部语句不支持公用表表达式   触发器。

我认为语句SUMTRANS中的insert into SUMTRANS.expense是数据库名称。根据文档，不支持。

希望这有帮助。

SQLite触发启动Android应用程序时出错

1 个答案: