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From: David E. Wheeler <[email protected]>
To: Tom Lane <[email protected]>
Cc: Peter Geoghegan <[email protected]>
Cc: Bruce Momjian <[email protected]>
Cc: Greg Stark <[email protected]>
Cc: Robert Haas <[email protected]>
Cc: Heikki Linnakangas <[email protected]>
Cc: Andrew Dunstan <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: default opclass for jsonb (was Re: Call for GIST/GIN/SP-GIST opclass documentation)
Date: Tue, 6 May 2014 15:54:19 -0700
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On May 6, 2014, at 3:39 PM, Tom Lane <[email protected]> wrote:

> Meh.  I would not think that that represents effective use of JSON:
> if the rows are all the same, why aren't you exposing that structure
> as regular SQL columns?  IMHO, the value of JSON fields within a SQL
> table is to deal with data that is not so well structured.

The use of JSON will not be ideal -- not in this sense. For example, at $work, we’re using it in place of an EAV model. Hence most rows have the same keys (or a subset of known keys). Or think of your favorite JSON API: every call to http://api.pgxn.org/user/$username.json is going to have a very similar structure.

> In any case, it was certainly the complaint that insertions might
> fail altogether that made me (and I assume others) want to not have
> jsonb_ops as the default opclass.  Is there a good reason not to
> fix that limitation while we still can?

Fixing++

David



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