Android SQLite。插入。 android.database.sqlite.SQLiteConstraintException

Question

创建数据库代码

    StringBuilder my_db = new StringBuilder();
    my_db.append("create table " + "my_db" + " (");
    my_db.append("id integer unique," +
                                  "tmp_id integer unique," +
                                  "tmp_at datetime ," +
                                  "tmp_count integer," +
                                  "tmp_reason_code integer);");
    db.execSQL(unlocked_achievements.toString());

插入代码

final String sql = "insert into my_db (id, tmp_reason_code, tmp_count, tmp_id) values (?, ?, ?, ?)";
SQLiteDatabase db = LocalDB.getInstance().getWritableDatabase();
db.beginTransaction();
try {
    SQLiteStatement stmt = db.compileStatement(sql);
    stmt.bindLong(1, id);
    stmt.bindLong(2, 0);
    stmt.bindLong(3, 0);
    stmt.bindLong(4, tmp_id);
    stmt.execute();
    db.setTransactionSuccessful();
} catch (SQLException e) {
    e.printStackTrace();
}
db.endTransaction();
db.close();

如果插入代码启动，则生成android.database.sqlite.SQLiteConstraintException。

Answer 1

表格定义中包含以下内容：

id     integer unique
tmp_id integer unique

因此，您的表格中已经有id或tmp_id，并且尝试再次插入它们会违反这些列的唯一约束。