VODKA indexes are still experimental and exist only as a branch in Alexanders own repo (https://github.com/akorotkov/postgres/tree/vodka https://github.com/akor

VODKA indexes are still experimental and exist only as a branch in Alexanders own repo (https://github.com/akorotkov/postgres/tree/vodka https://github.com/akorotkov/postgres/tree/vodka). I do not think they are anywhere near production ready, and even if they are they are not an extension. Alexander is working on allowing new index access methods (the type of index: e.g. hash, btree, gin, gist) to be added in extensions.