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[newbenji]

I have the problem it opens many connections before closing them.

It should have a pool with max connection and never be able to get pass that. As i run the code, and gets the error with to many connections.

[julienschmidt]

There seems to be a bug in the database/sql package which causes too many open connections https://code.google.com/p/go/issues/detail?id=5323

Also the connection pooling is handled by the database/sql package and not by the driver. It currently lacks an option to give the user / driver control over the connection pool. The related issue is here: https://code.google.com/p/go/issues/detail?id=4805