On 04/26/2016 08:06 AM, 陈天舟 wrote:
I am interested in adding Protocol Buffer support for Postgres. Protocol Buffer occupies less space than JSON. More importantly, it has schema and is forward/backward compatible. All these make it a very good format for persistency.

Have you investigated JSONB vs ProtoBuf space usage ?
    (the key being  the "B" -- Postgres' own binary JSON implementation)

The "per-column schema" thing sounds difficult to do without major changes to the core unless/until we have generalized user-defined metadata for objects ....

Just my .02€

    / J.L.

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