Ability to compare two plans - feature

[mgraham-cracker]

I had thoughts of implementing your viewer as part of a code review process. It could be useful to such an implementation if the possibility existed to diff two different sqlplans. Giving a reviewer the ability to validate a plan against a previous plan before approving submission to a pipeline was the thought.

[JustinPealing]

This would be really neat - another use case is comparing a fast and slow query to try and figure out what it is that is making the slow query slower.

It could be tricky to implement - identifying similar / different nodes would be really difficult in XSLT, so a move away from XSLT would probably be a precursor to this.