Tom Lane wrote:
> BTW, is anyone checking the other side of this, ie "COPY IN" with equally
> wide rows? There doesn't seem to be a lot of value in supporting dump
> if you can't reload ...
Indeed, the lines bigger than 1GB can't be reloaded :(
My test: with a stock 9.5.1 plus Alvaro's patch with my additional
int64 fix mentioned upthread, creating this table and filling
all columns with 200MB of text each:
create table bigtext(t1 text ,t2 text, t3 text, t4 text, t5 text, t6 text, t7 text);
# \copy bigtext to '/var/tmp/bigtext.sql'
That part does work as expected, producing this huge single line:
$ wc /var/tmp/bigtext.sql 1 7 1468006407 /var/tmp/bigtext.sql
But reloading it fails:
# create table bigtext2 (like bigtext);
CREATE TABLE
# copy bigtext2 from '/var/tmp/bigtext.sql';
ERROR: 54000: out of memory
DETAIL: Cannot enlarge string buffer containing 1073676288 bytes by 65536
more bytes.
CONTEXT: COPY bigtext2, line 1
LOCATION: enlargeStringInfo, stringinfo.c:278
# \copy bigtext2 from '/var/tmp/bigtext.sql'
ERROR: 54000: out of memory
DETAIL: Cannot enlarge string buffer containing 1073741808 bytes by 8191
more bytes.
CONTEXT: COPY bigtext2, line 1
LOCATION: enlargeStringInfo, stringinfo.c:278
Best regards,
--
Daniel Vérité
PostgreSQL-powered mailer: http://www.manitou-mail.org
Twitter: @DanielVerite
