You might try to clean up this code a bit by packaging the key lookup code in a named template.

您可能希望将键查找代码打包在指定模板中，使代码更加清晰。

youdao

The latter is actually a primary key lookup against the parent table and constitutes the foreign key constraint verification.

索引扫描实际上是对父表进行主键查找，并完成外键约束验证。

youdao

The latter is actually a primary key lookup against the parent table and constitutes the foreign key constraint verification.

索引扫描实际上是对父表进行主键查找，并完成外键约束验证。

youdao