revert function for to_json ?

From: Marc Mamin <M(dot)Mamin(at)intershop(dot)de>
To: "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org>
Subject: revert function for to_json ?
Date: 2016-05-23 14:03:06
Message-ID: B6F6FD62F2624C4C9916AC0175D56D8842154FC4@jenmbs01.ad.intershop.net
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Hello,

I'm looking for $subject

example:

how to revert
select to_json(E'a\n''b'::text)

I can achieve it with something like this:
select json_extract_path_text(('{"a":'||to_json(E'a\n''b'::text)||'}')::json,'a')

does anybody knows a less ugly solution ?

regards,

Marc Mamin

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