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Re:Eva – A distributed entity-attribute-value database in Cl... by chrisan on Friday June 28, 2019 @11:41AM (#20305462)
Why not just use a json store for those sparse attributes?

EAV performance at large scale is really dreadful. So many queries.

Re:Eva – A distributed entity-attribute-value database in Cl... by sooheon on Saturday June 29, 2019 @03:30AM (#20311296)
EAV with a query engine and syntax not designed for it is awful. EAV (and AEV and AVE and VAE) with datalog queries is performant, a joy to use, and way more flexible than json stores.