Re: backup manifests

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: David Fetter <david(at)fetter(dot)org>, David Steele <david(at)pgmasters(dot)net>, Tels <nospam-pg-abuse(at)bloodgate(dot)com>, Suraj Kharage <suraj(dot)kharage(at)enterprisedb(dot)com>, Rushabh Lathia <rushabh(dot)lathia(at)gmail(dot)com>, Andrew Dunstan <andrew(dot)dunstan(at)2ndquadrant(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>, Jeevan Chalke <jeevan(dot)chalke(at)enterprisedb(dot)com>, vignesh C <vignesh21(at)gmail(dot)com>
Subject: Re: backup manifests
Date: 2020-01-02 02:20:11
Message-ID: 30229.1577931611@sss.pgh.pa.us
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Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> AFAICS, the only options to make that work with JSON are (1) introduce
> a new hand-coded JSON parser designed for frontend operation, (2) add
> a dependency on an external JSON parser that we can use from frontend
> code, or (3) adapt the existing JSON parser used in the backend so
> that it can also be used in the frontend.
> ... I'd
> be willing to do (3) if somebody could explain to me how to solve the
> problems with porting that code to work on the frontend side, but the
> only suggestion so far as to how to do that is to port memory
> contexts, elog/report, and presumably encoding handling to work on the
> frontend side. That seems to me to be an unreasonably large lift,

Yeah, agreed. The only consideration that'd make that a remotely
sane idea is that if somebody did the work, there would be other
uses for it. (One that comes to mind immediately is cleaning up
ecpg's miserably-maintained fork of the backend datetime code.)

But there's no denying that it would be a large amount of work
(if it's even feasible), and nobody has stepped up to volunteer.
It's not reasonable to hold up this particular feature waiting
for that to happen.

If a tab-delimited file can handle this requirement, that seems
like a sane choice to me.

regards, tom lane

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