防止InnoDB在DUPLICATE KEY上自动递增

问题描述

我当前在将主键ID设置为auto increment时遇到问题.它一直递增ON DUPLICATE KEY.

I am currently having problems with a primary key ID which is set to auto increment. It keeps incrementing ON DUPLICATE KEY.

例如:

ID | field1     | field2

1  | user       | value

5  | secondUser | value

86 | thirdUser  | value

从上面的描述中，您会注意到我在该表中有3个输入，但是由于每次更新都会自动递增，因此第三个输入的ID为86.

From the description above, you'll notice that I have 3 inputs in that table but due to auto increment on each update, ID has 86 for the third input.

反正有避免这种情况吗?

Is there anyway to avoid this ?

这是我的mySQL查询的样子:

Here's what my mySQL query looks like:

INSERT INTO table ( field1, field2 ) VALUES (:value1, :value2)
            ON DUPLICATE KEY
            UPDATE field1 = :value1, field2 = :value2 

这是我的桌子的样子；

And here's what my table looks like;

CREATE TABLE IF NOT EXISTS `table` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `field1` varchar(200) NOT NULL,
  `field2` varchar(255) NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `field1` (`field1`),
  KEY `id` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;

推荐答案

您可以设置"0"的sysvar_innodb_autoinc_lock_mode"rel =" noreferrer> innodb_autoinc_lock_mode 配置选项，该选项确保所有INSERT语句将为AUTO_INCREMENT列分配连续的值.

You could set the innodb_autoinc_lock_mode config option to "0" for "traditional" auto-increment lock mode, which guarantees that all INSERT statements will assign consecutive values for AUTO_INCREMENT columns.

也就是说，您不应该依赖于应用程序中连续的自动增量ID.他们的目的是提供唯一的标识符.

That said, you shouldn't depend on the auto-increment IDs being consecutive in your application. Their purpose is to provide unique identifiers.

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