Re: jsonb, unicode escapes and escaped backslashes

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Andrew Dunstan <andrew(at)dunslane(dot)net>
Cc: Noah Misch <noah(at)leadboat(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: jsonb, unicode escapes and escaped backslashes
Date: 2015-01-27 19:28:27
Message-ID: 24062.1422386907@sss.pgh.pa.us
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Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
> On 01/27/2015 01:40 PM, Tom Lane wrote:
>> In particular, I would like to suggest that the current representation of
>> \u0000 is fundamentally broken and that we have to change it, not try to
>> band-aid around it. This will mean an on-disk incompatibility for jsonb
>> data containing U+0000, but hopefully there is very little of that out
>> there yet. If we can get a fix into 9.4.1, I think it's reasonable to
>> consider such solutions.

> Hmm, OK. I had thought we'd be ruling that out, but I agree if it's on
> the table what I suggested is unnecessary.

Well, we can either fix it now or suffer with a broken representation
forever. I'm not wedded to the exact solution I described, but I think
we'll regret it if we don't change the representation.

The only other plausible answer seems to be to flat out reject \u0000.
But I assume nobody likes that.

regards, tom lane

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