Pre-query / OnConnect-query

Hi there,
I do not have idea how I could achieve some kina of ON-CONNECT QUERY connection in the best way.
Let's say when CI is connecting to database I would like to send one query (i.e. set time_zone = "+00:00") I do not have any other option to do so on specific machine.
I do not want to repeat that query many times, just once when the connection is initialized(). I was thinking about some otpions like extending some classes of CI or add a support for that in Config file and CI itself and do the PR to the CI repo .... but the question is: Is there no option actually in CI to do so? I cannot find anything in the docs.