how to read voicemail

Some SIM cards do not have a preset voicemail number at the factory, but the operator also requires the ability to adaptively read the preset VM number from the phone according to PLMN. This article describes how to preset VM number in XML, and how to allow users to modify and remember the user's choices. VM number uses a priority of: SIM card read > user setting

Some SIM cards are not preset with the VoiceMail number at the factory, but the operator requires that the preset VM number be read from the mobile phone according to PLMN. This section describes how to preset VM number in xml format and how to allow users to modify and remember their choices. The priority of VM number is: SIM card reading> User Settings> xml preset. When you modify the voice mail number, t

1. Of course to send voice messages to friends, must be on both sides have opened the premise of IMessage. If you open a IMessage information service, but your friends are not open, or not using the IPhone, you can not send voice. When you see an

Lost update: Two transactions update a row of data at the same time, the last transaction update will overwrite the first transaction update, resulting in the first transaction update data loss, which is caused by no lock; 1. Dirty reads: Dirty reading means that when a transaction is accessing the data and the data has been modified, and the modification has not been submitted to the database, another transaction accesses the data and then uses the data.e.g.The original salary for 1.Mary was 1

Database transaction isolation level-dirty read, phantom read, non-repeated read, transaction level I. database transaction isolation level There are four database transaction isolation levels, from low to high: Read uncommitted, Read committed, Repeatable

Database transaction isolation level and dirty read, phantom read, non-repeated read, transaction level I. database transaction isolation level There are four database transaction isolation levels, from low to high: Read uncommitted, Read committed, Repeatable

I. Database transaction ISOLATION LEVEL There are 4 isolation levels for database transactions, from low to high to read uncommitted, Read committed, Repeatable read, and Serializable, which can solve the problems of dirty reading, non-repeatable reading, and Phantom reading one by one. √: May appear x: does not appear Dirty

1. Some problematic reads in the transaction: dirty read, non-repeatable read, Phantom readThe dirty read (Dirty Read) transaction T1 updated the contents of a row of records, but did not commit the changes. The transaction T2 reads the updated row, and then T1 performs the rollback operation, canceling the modificatio

Ext: http://blog.csdn.net/fatherican/article/details/44966921 1, Dirty Read One transaction reads another transaction, and the pending modification is dirty read. Here's the so-called modification, in addition to the update operation, do not forget, but also includeInsert and delete operations. Consequences of dirty reading: If the latter transaction is rolled back, all changes made to it will be revoked.

4 attributes of a database transaction:Atomicity (atomic): both succeed or fail;Consistency (consistency): After a transaction operation, the database is in the same state as the business rules; for example, after the A,b account transfers, the total amount remains unchanged;Isolation (Isolation): transactions in operations do not affect each other;Persistence (Durability): After a transaction is committed, it is persisted to the database. Dirty read,

Issues arising from transaction concurrency:Dirty reads: One transaction reads data that is not committed by another transactionTransaction 1: Updating a single piece of dataTransaction 2: Read record of transaction 1 updateTransaction 1: Commit commits are calledAt this point, the data read by transaction 2 is data stored in database memory, called dirty reads.The data

1. Dirty read : Dirty read refers to when a transaction is accessing the data, and the data has been modified, and this modification has not been committed to the database, then another transaction also accesses the data, and then used this data. 2. Non-repeatable reads : Refers to the same data that is read multiple times within a transaction. When this transact

Original: http://www.cnblogs.com/phoebus0501/archive/2011/02/28/1966709.html Dirty reading is that the data has not been submitted (not necessarily a successful commit), it was used by other affairs.1. Dirty Read : Dirty read refers to when a transaction is accessing the data, and the data has been modified, and this modification has not been committed to the database, then another transaction also accesses

1, Dirty ReadA transaction is read to another transaction, and a modification that has not yet been committed is a dirty read. Here are the so-called modifications, in addition to the update operation, do not forget that also includesInsert and delete operations.The consequences of dirty reads: If the latter transaction is rolled back, all of its modifications will be revoked. The data that the previous tra

Label:Article Source: http://www.bkjia.com/sjkjc/806530.html The database's dirty reads, non-repeatable reads, and Phantom reads are all related to the isolation of the transaction. So first look at the 4 major features of the transaction.4 Characteristics of the transaction (ACID): Atomicity (atomicity): A transaction is a logical unit of work for a database, and its modifications to the database are either all executed or not executed at all. Consistency (CONSISTEMCY): Before and

Let's start with a big picture: SQL statement used: bys@ ocm1>select dbms_rowid.rowid_relative_fno (ROWID) file#,dbms_rowid.rowid_block_number rowid (Block#,deptno) From Bys.test; file# block# DEPTNO ---------- ---------- ---------- 4 391 10 As an example of the above diagram, the text description analyzes the process of obtaining the required data blocks when the foreground process issues a query statement: Note: This article does not involve the parsing part of SQL statements, client

1. Read all strings separated by spaces in the specified file. # Include Ifstream indata; // For the file Indata. Clear (); String filename;Filename = "primes.txt "; Indata. Open (filename. c_str ());String temp_word; // You can also directly read the integer data int temp_word here;// Indata> temp_word; While (indata. EOF ()) // If the file contains a line break, you need to use while (indata. Good ()

mysql> set global read_only=0; Query OK, 0 rows Affected (0.00 sec) mysql> show variables like '%read_only% '; +------------------+-------+ | Variable_name | Value | +------------------+-------+ | innodb_read_only | Off | | read_only | Off | | tx_read_only | Off | +------------------+-------+ 3 rows in Set (0.00 sec) mysql> set global read_only=1; Query OK, 0 rows Affected (0.00 sec) mysql> show variables like '%read_only% '; +------------------+-------+ | Variable_name

Dirty Read, Phantom Read, and non-repeatable READ + transaction ISOLATION level 1. Dirty read: Dirty read refers to when a transaction is accessing the data, and the data has been modified, and this modification has not been committed to the database, then another transac

Tags: presence IDT does not appear height made Zab repeated modificationsI. Isolation levels and phenomena There are 4 levels of database isolation Read uncomitted, unauthorized reading Read Committed, authorized to read REPEATABLE Read, repeatable reading Serializable, serialization There are 3 types of inconsistenci