Infinidb-“`CREATE_TIMESTAMP` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP”出现错误

Question

我正在尝试将数据库从mysql移植到infinidb.But，我在移植时遇到了上面的错误(在标题中描述)。

`CREATE_TIMESTAMP` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP

在mysql中有效，但在infinidb中无效。错误为:错误代码: 138。infinidb不支持该语法或数据类型。任何帮助都将不胜感激。

Answer 1

这是您正在尝试的完整SQL语句吗？我能够使用：

create table test (`CREATE_TIMESTAMP` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP);

以下是控制台输出

[root@centos6 bin]# idbmysql 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 12
Server version: 5.1.73 Calpont InfiniDB 4.5 Alpha

Copyright (c) 2014, InfiniDB, Inc. and/or its affiliates. All rights reserved.
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

InfiniDB is a registered trademark of InfiniDB, Inc. and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> use test;
Database changed
mysql> create table test (`CREATE_TIMESTAMP` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP);
Query OK, 0 rows affected (0.00 sec)

mysql> describe test;
+------------------+-----------+------+-----+-------------------+-----------------------------+
| Field            | Type      | Null | Key | Default           | Extra                       |
+------------------+-----------+------+-----+-------------------+-----------------------------+
| CREATE_TIMESTAMP | timestamp | NO   |     | CURRENT_TIMESTAMP | on update CURRENT_TIMESTAMP |
+------------------+-----------+------+-----+-------------------+-----------------------------+
1 row in set (0.00 sec)

mysql> 

如果这不起作用，或者你正在用不同的方式尝试语法，请告诉我。另外，您正在尝试的InfiniDB版本是什么？

谢谢!

Answer 2

看起来你不能在InfiniDB中使用时间戳数据类型。我有与@mhoglan相同的版本，但似乎在该查询中有一个小错误：

mysql> create table test (`CREATE_TIMESTAMP` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP);
Query OK, 0 rows affected (0.00 sec) 

末尾缺少"engine=infinidb;"，这将在infinidb中创建表。相反，该表是使用MySQL的默认引擎(MyISAM或其他引擎)创建的。

mysql> create table test (`CREATE_TIMESTAMP` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP) engine=infinidb;
ERROR 138 (HY000): The syntax or the data type(s) is not supported by InfiniDB. Please check the InfiniDB syntax guide for supported syntax or data types.

如您所见，添加engine=infinidb失败。

如果您可以使用datetime，这可能是可行的方法；timestamp目前似乎不受支持:(

Answer 3

我猜是InfiniDB中不允许的NOT NULL约束。