Isolation level

Hi, I´m trying to execute my queries against sql server using "read uncommitted" or "snapshot" isolation level cause I don´t want to lock others while long queries.

I think there is no other way to do that but insert it in sql statemet (example: "set transaction isolation level read uncommitted; select * from ...") but does not work, locks are adquire in the server for this query.

Is there something in logstash / jdbc / sequel that avoid to use this workarround?

What database are you reading from? Not all databases will support this, and the database library will not support it for all databases.

I think MS SQL Server is supported, I use it.