C# Entityframework core 2.1 查询不包括 where 条件

Question

My following query is not including the where condition in sql query plan.

var userStandby = await _context.UserStandby
                                .FirstOrDefaultAsync(standBy => ECUserId.Equals(standBy.ECUserId, StringComparison.OrdinalIgnoreCase));

i am using EF Core 2.1 and the UserStandby table has got 12500 records. I am getting timeout error as the query is not including the where condition.

Can anyone please help me how to resolve this?

thanks

Answer 1

Try this instead

var userStandby = await _context.UserStandby
                                .Where(standBy => ECUserId.Equals(standBy.ECUserId, StringComparison.OrdinalIgnoreCase))
                                .FirstOrDefaultAsync();

You put your condition in the Where expression and with firstordefault you say that you want only 1 result or null.