Re: pg_dump multi VALUES INSERT

David Rowley <david.rowley@2ndquadrant.com>

From: David Rowley <david.rowley@2ndquadrant.com>
To: Surafel Temesgen <surafel3000@gmail.com>
Cc: Fabien COELHO <coelho@cri.ensmp.fr>, Dmitry Dolgov <9erthalion6@gmail.com>, Alvaro Herrera <alvherre@2ndquadrant.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2019-01-02T22:37:59Z
Lists: pgsql-hackers
On Thu, 3 Jan 2019 at 01:50, Surafel Temesgen <surafel3000@gmail.com> wrote:
> On Mon, Dec 31, 2018 at 12:38 PM David Rowley <david.rowley@2ndquadrant.com> wrote:
>> Just looking at the v5 patch, it seems not to handle 0 column tables correctly.

> The attach patch contain a fix for it

+ /* if it is zero-column table then we're done */
+ if (nfields == 0)
+ {
+ archputs(insertStmt->data, fout);
+ continue;
+ }

So looks like you're falling back on one INSERT per row for this case.
Given that this function is meant to be doing 'dump_inserts_multiple'
INSERTs per row, I think the comment should give some details of why
we can't do multi-inserts, and explain the reason for it. "we're done"
is just not enough detail.

I've not looked at the rest of the patch.

-- 
 David Rowley                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services


Commits

  1. Add pg_dumpall --rows-per-insert

  2. pg_dump: allow multiple rows per insert