sp_executesql causing my query to be very slow

Question

I am having some issues when running sp_executesql on a database table. I am using an ORM (NHibernate) that generates a SQL query that queries one table in this case. This tab

Answer 1

what is the data type of .[Context] use the same datatype

right now you are using nvarchar(2) but that seems odd for something like 55, if you are not using the same data types you will get conversions which then cause scans

based on your updated question, it looks like it is varchar(255), then do this

WHERE this_.[Context] = @p0',N'@p0 varchar(255)',@p0='55'