On Fri, Apr 29, 2016 at 4:06 PM, Andrew Dunstan <and...@dunslane.net> wrote:
> One other point: I think we really need most of these pieces - if we are
> going to squash the whitespace we need functions to do that cleanly for json
> and to pretty-print json.

I don't think it should be squashed per se -- we just don't *add* any
whitespace.  So the current behavior of to_json,

postgres=# select to_json(q) from (select 1, '{"a"  :  "foo"}'::json) q;
 {"?column?":1,"json":{"a"  :  "foo"}}

...is correct to me on the premise that the user deliberately chose
the whitespace preserving json type and did not run compat on it.
postgres=# select row_to_json(q) from (select 1, '{"a"  :  "foo"}'::jsonb) q;
 {"?column?":1,"jsonb":{"a": "foo"}}

really ought to render (note lack of space after "a"):

This is a simple matter of removing spaces in the occasional C string
literal in the serialization routines and adding a json_pretty


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