Question

我想知道如何绑定SQLite FTS查询参数以清理输入。我试图运行如下所示的原始查询，最终导致运行时错误。

当我创建表格时。效果很好，

private const val SQL_CREATE_ENTRIES =
    "CREATE VIRTUAL TABLE entry USING FTS4 (title, subtitle);"
db.execSQL(SQL_CREATE_ENTRIES)

某些条目已成功插入到数据库，

val values = ContentValues().apply {
    put("title", "Test title")
    put("subtitle", "Test subtitle")
}
val newRowId = db?.insert("entry", null, values)

现在我正在运行原始查询，

val query = "SELECT * FROM entry WHERE title MATCH '?'"
val args = arrayOf("Test")
val cursor: Cursor? = db.rawQuery(query, args)

此操作因运行时错误而失败，

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.achellies.kotlin/com.achellies.kotlin.MainActivity}: java.lang.IllegalArgumentException: Cannot bind argument at index 1 because the index is out of range.  The statement has 0 parameters.
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3086)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3229)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1926)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:6981)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1445)
     Caused by: java.lang.IllegalArgumentException: Cannot bind argument at index 1 because the index is out of range.  The statement has 0 parameters.
        at android.database.sqlite.SQLiteProgram.bind(SQLiteProgram.java:240)
        at android.database.sqlite.SQLiteProgram.bindString(SQLiteProgram.java:194)

对于non FTS数据库，我们可以使用=?绑定进行查询。因此，如何对具有FTS4 SQLite子句的MATCH查询进行清理？

Answer 1

val query = "SELECT * FROM entry WHERE title MATCH '?'"

'?'应该写成单引号。正确的方法是

val query = "SELECT * FROM entry WHERE title MATCH ?"

如何在Kotlin中绑定SQLite FTS4查询参数

1 个答案: