This is such a hack that it's more likely a dig on MySQL. It even says "MySQL has a lot of limitions on theses objects but you can circumvent them by tricking MySQL... It's easier to implement a FGAC system in other databases such as Oracle or Postgres as their objects have less conceptual limitions."
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Throwin this out there cause you hate postgres huh?
This is such a hack that it's more likely a dig on MySQL. It even says "MySQL has a lot of limitions on theses objects but you can circumvent them by tricking MySQL... It's easier to implement a FGAC system in other databases such as Oracle or Postgres as their objects have less conceptual limitions."