| From: | David Fetter <david(at)fetter(dot)org> |
|---|---|
| To: | Craig Ringer <craig(at)2ndquadrant(dot)com> |
| Cc: | PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [PROTOCOL TODO] Permit streaming of unknown-length lob/clob (bytea,text,etc) |
| Date: | 2014-12-01 14:38:11 |
| Message-ID: | 20141201143811.GA7121@fetter.org |
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| Thread: | |
| Lists: | pgsql-hackers |
On Mon, Dec 01, 2014 at 02:55:22PM +0800, Craig Ringer wrote:
> Hi all
>
> Currently the client must know the size of a large lob/clob field, like
> a 'bytea' or 'text' field, in order to send it to the server. This can
> force the client to buffer all the data before sending it to the server.
Yes, this is not good.
> It would be helpful if the v4 protocol permitted the client to specify
> the field length as unknown / TBD, then stream data until an end marker
> is read.
What's wrong with specifying its length in advance instead? Are you
thinking of a one or more use cases where it's both large and unknown?
Cheers,
David.
--
David Fetter <david(at)fetter(dot)org> http://fetter.org/
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