Github user nickwallen commented on the issue:
https://github.com/apache/metron/pull/1014
> Should assignment be = or :=?
Ultimately, I'd like to see us move to supporting `=` as that is just way
more intuitive for most people. Maybe that means supporting both `=` and `:=`
for some period of time?
It looks like `StellarAssignment` was not altered here, so maybe both are
supported in this PR? Is that what you are thinking @ottobackwards ?
I am not sure how this PR impacts all the places where Stellar is used and
assignment might already occur; field transforms, enrichment, REPL, profiler,
etc. There is some other way in which assignment is handled in at least some
of these places. I imagine that we would need to update these to use the new
mechanism here? Or maybe that is left to a future PR?
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