public inbox for [email protected]  

help / color / mirror / Atom feed

From: Andrew Dunstan <[email protected]>
To: Joe Conway <[email protected]>
To: Davin Shearer <[email protected]>
To: PostgreSQL-development <[email protected]>
Subject: Re: Emitting JSON to file using COPY TO
Date: Mon, 4 Dec 2023 07:41:20 -0500
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <CALvfUkBxTYy5uWPFVwpk_7ii2zgT07t3d-yR_cy4sfrrLU=kcg@mail.gmail.com>
	<[email protected]>
	<CAFCRh-_LhP5Ln4-beVz=1pQ9VycU3hAxnJHXhPHZRmX0BSCVEQ@mail.gmail.com>
	<CAFCRh--Vhx0105S7SWAYHGcVMTSRtbcoArDUGSbYSWRUGunW_g@mail.gmail.com>
	<CAKFQuwZb3zaSqkOvGXRRLZEW61az+4xyHZ7tBPR91JfrcdCKvA@mail.gmail.com>
	<[email protected]>
	<CAFCRh-_GdiUvjd5z5FfvTfhruOnYqBu163XU47zZE8RNATCJGQ@mail.gmail.com>
	<[email protected]>
	<CALvfUkCq3pvkmniWEKZwkbA6hNNvkANF3OamMfhC170RgY+HJg@mail.gmail.com>
	<[email protected]>
	<[email protected]>
	<CALvfUkD9ZFUU2pe9RMPqdGaKXu5OZi5xzOiPokGhOoPJ56FgAw@mail.gmail.com>
	<[email protected]>
	<CALvfUkBKTr9WLAbHQYmwZ7SVp5_VDey1F1uCZtKL4+H1-WvyBw@mail.gmail.com>
	<[email protected]>


On 2023-12-03 Su 20:14, Joe Conway wrote:
> (please don't top quote on the Postgres lists)
>
> On 12/3/23 17:38, Davin Shearer wrote:
>> " being quoted as \\" breaks the JSON. It needs to be \".  This has 
>> been my whole problem with COPY TO for JSON.
>>
>> Please validate that the output is in proper format with correct 
>> quoting for special characters. I use `jq` on the command line to 
>> validate and format the output.
>
> I just hooked existing "row-to-json machinery" up to the "COPY TO" 
> statement. If the output is wrong (just for for this use case?), that 
> would be a missing feature (or possibly a bug?).
>
> Davin -- how did you work around the issue with the way the built in 
> functions output JSON?
>
> Andrew -- comments/thoughts?
>
>

I meant to mention this when I was making comments yesterday.

The patch should not be using CopyAttributeOutText - it will try to 
escape characters such as \, which produces the effect complained of 
here, or else we need to change its setup so we have a way to inhibit 
that escaping.


cheers


andrew



>
>
--
Andrew Dunstan
EDB: https://www.enterprisedb.com

view thread (35+ messages)  latest in thread

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: [email protected]
  Cc: [email protected], [email protected], [email protected]
  Subject: Re: Emitting JSON to file using COPY TO
  In-Reply-To: <[email protected]>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox