使用 @db.VarChar(n)
Optimize 提供建议,帮助你识别和解决由 PostgreSQL 中使用 @db.VarChar(n)
类型引起的性能问题。
¥Optimize provides recommendations to help you identify and resolve performance issues caused by the use of @db.VarChar(n)
type in PostgreSQL.
Item
模型中的名称字段已使用原生类型 @db.VarChar(n)
:
¥The @db.VarChar(n)
native type has been used within the Item
model on the name field:
model Item {
// ...
name String @db.VarChar(1)
// ...
}
为什么这是一个问题
¥Why this is a problem
@db.VarChar(n)
类型将内容的最大长度限制为 n
,如果应用管理不当,可能会导致生产环境中出现意外问题。在 PostgreSQL 中,varchar(n)
的性能与 text
相同,并且没有为 varchar(n)
提供额外的优化,因此在它们之间进行选择更多是基于惯例而非性能。
¥The @db.VarChar(n)
type restricts content to a maximum length of n
, which can cause unexpected issues in production if not properly managed by the application. In PostgreSQL, varchar(n)
performs the same as text
, and no additional optimizations are provided for varchar(n)
, making the choice between them more about convention than performance.