Having seen PGQL, I think I'll stay with SPARQL. And for efficient implementation the database underneath still needs to have extended graph support (in fact,

Having seen PGQL, I think I'll stay with SPARQL. And for efficient implementation the database underneath still needs to have extended graph support (in fact, I find it hilarious that Oracle seems to be spearheading it, as they have previously canceled their graph support around 2012 - enough that I wrote about how it was deprecated and removed from support in my thesis in 2014.