MySQL Big FK标识符

Question

我正在尝试创建一个fk,但MySQL不允许它...

Identifier name 'foobarbaz_FK_CATALOG_PRODUCT_ENTITY_WEEE_DISCOUNT_PRODUCT_ENTITY' is too long [ CREATE TABLE `foobarbaz_weee_discount` (   `entity_id` int(10) unsigned NOT NULL DEFAULT '0',   `website_id` smallint(5) unsigned NOT NULL DEFAULT '0',   `customer_group_id` smallint(5) unsigned NOT NULL,   `value` decimal(12,4) NOT NULL DEFAULT '0.0000',   KEY `foobarbaz_FK_CATALOG_PRODUCT_ENTITY_WEEE_DISCOUNT_WEBSITE` (`website_id`),   KEY `foobarbaz_FK_CATALOG_PRODUCT_ENTITY_WEEE_DISCOUNT_PRODUCT_ENTITY` (`entity_id`),   KEY `foobarbaz_FK_CATALOG_PRODUCT_ENTITY_WEEE_DISCOUNT_GROUP` (`customer_group_id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; ]

有没有办法添加大fks？谢谢.

Answer 1

不,它被硬编码到MySQL中,请参阅文档(在页面底部).但它与FK的名称无关.这是索引的名称太长(最多64个字符):

`Identifier`                  `Maximum Length (characters)`
Database                      64
Table                         64
Column                        64
Index                         64
Constraint                    64
Stored Procedure or Function  64
Trigger                       64
View                          64
Alias                         256 (see exception following table)
Compound Statement Label      16