EF框架从MySql生成模型时异常

无法生成模型:“System.Data.StrongTypingException: 表“TableDetails”中列“IsPrimaryKey”的值为 DBNull

 
引用：http://stackoverflow.com/questions/33575109/mysql-entity-the-value-for-column-isprimarykey-in-table-tabledetails-is



One way to resolve the issue is,

1. Open Services (services.msc) and restart MySQL57 service.
2. Execute the following commands in MySQL.
use <<database name>>;
set global optimizer_switch='derived_merge=OFF';
3. Update the .edmx.