“Update-Database” command fails with TimeOut exception

Question

I\'m using EF migrations and have a table with a lot of data. I need to change MaxLength of a concrete column (it hadn\'t length constraints).

ALTER TABLE MyDb A         


        

Answer 1

In my case the issue was caused by a very large query which timed out in EF but was able to complete in SSMS.

The answer which suggests Update-Database -script did not work for me, it gave another error message.

For me, I did the following:

• Open SSMS
• Tools > SQL Server Profiler
• Go back to VS and run Update-Database
• Watch the Server Profiler
• You should be able to see the query it times out on
• Copy that query and run it in SSMS
• Now re-run Update-Database and that slower part should be fine because the query has already been completed.

Disclaimer: This might not work for all cases, because it depends on what particular query is slowing you down. For me, it worked.