cubicweb #3369614 SqlGenobjectstore and rql.execute [waiting feedback]

Executing store.rql('UPDATE...') yielding to session.rql('UPDATE..') and store.relate(...) with an inlined relation (thus yielding to an SQL update statement), leads to a postgres deadlock. This should be fixed or at least documented as a limitation.

prioritynormal
typebug
done in<not specified>
load1.000
load left1.000
closed by<not specified>