This is the official Adobe/Tableau announcement from 2014.Tableau and Adobe Analytics: Digital Marketing Gets Even More Awesome | Tableau SoftwareYou may be able to build a Web Data Connector as well, but I'm not sure if the log info is exposed in a way that would let that work.Thank youNagesh Kumar

To be honest, I am not really clear on what you mean by the segment builder operator menu or where you'd include the is null and is not null options. Can you please elaborate a bit more on what you're trying to do? Where would you want to use these options? Are you referring to the Segment UI settings when you mentioned the Segment builder operator menu? Was this something that you were using before and then it was removed in the UI? Do you have any docs that explain what you're looking to do? I...

Adobe Analytics has a set of APIs, what exactly API(s) you'd like to call in M Query? You can test at Adobe API explorer.