The patch introduce a new type macaddr8 for EUI-64 addresses[2] (assuming OUI field is 24 bits wide) with EUI-48 (existing "macaddr" type) interoperability. It is a mostly copy-pasted macaddr implementation with necessary changes for increased range. Consensus was reached on such implementation in the current thread before.
There are two patch files for convenient reviewing: base macaddr8 implementation and its supporting in btree-gin and btree-gist indexes.
The patch: * cleanly applies to the current master (6af8b89adba16f97bee0d3b01256861e10d0e4f1); * passes tests; * looks fine, follows the PostgreSQL style guide; * has documentation changes; * has tests.
All notes and requirements were took into account and the patch was changed according to them. I have no suggestions on improving it.
The new status of this patch is: Ready for Committer
