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JSOB indexing looks good performance wise but all non commercial dbs including monetdb lacks UPSERTS (as inbuild functionality) apart from MySQL. If we can UPSERT the data in JSOB based on key that would be awesome. Also since monetdb doesnt have UPSERTS so that the only reason for me not to use it ,otherwise its an awsome database for Analytical queries.

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I really wonder what you mean by UPSERTS. Because the traditional meaning for UPSERT is "UPDATE if exists, INSERT otherwise", aka MERGE. And you're right PostgreSQL is missing that, but hopefully we'll get something like that in PostgreSQL 9.5 at the end of 2015. There are ways to do that in PostgreSQL using writable CTEs, in some cases.

But that's completely unrelated to JSONB, so maybe you mean something else?

Nitpick: it's JSONB, not JSOB.

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