Обсуждение: pg_dump limit 1000 rows
Hi all,
I wanna do a minimal dump DB file. (I'm using PostgreSQL 9.2)
So I was thinking about getting the last 1000 rows data from some tables....
I could do something like:
pg_dump dbname --schema-only -f db_schema.sql
CREATE OR REPLACE FUNCTION _save_top_1000_row_tables(chemin file_path)
RETURNS character varying AS
$BODY$declare
_temps timestamp without time zone;
begin
execute 'copy (SELECT * FROM table1 limit 1000 offset 0) TO ''' || file_path||'table1.txt''';
execute 'copy (SELECT * FROM table2 limit 1000 offset 0) TO ''' || file_path||'table2.txt''';
execute 'copy (SELECT * FROM table3 limit 1000 offset 0) TO ''' || file_path||'table3.txt''';
return ('OK');
end;$BODY$
LANGUAGE plpgsql VOLATILE
COST 100;
But using the "COPY" I wouldn't have my foreign keys right? Is there any other option/idea?
Thanks
On Wed, Mar 2, 2016 at 4:56 PM, drum.lucas@gmail.com <drum.lucas@gmail.com> wrote:
I wanna do a minimal dump DB file. (I'm using PostgreSQL 9.2)So I was thinking about getting the last 1000 rows data from some tables....
Have a look at pg_sample, it should do exactly what you are looking to do.
https://github.com/mla/pg_sample
https://github.com/mla/pg_sample
On Wed, Mar 2, 2016 at 4:56 PM, drum.lucas@gmail.com <drum.lucas@gmail.com> wrote:I wanna do a minimal dump DB file. (I'm using PostgreSQL 9.2)So I was thinking about getting the last 1000 rows data from some tables....Have a look at pg_sample, it should do exactly what you are looking to do.
https://github.com/mla/pg_sample
Thanks Bricklen...
I've ran the pg_sample in a test server and it works!
But, in my main DB i'm getting the error:
Creating table "_pg_sample"."pg_catalog_pg_statistic" DBD::Pg::db do failed: ERROR: column "stavalues1" has pseudo-type "anyarray" at ./pg_sample line 296
main::__ANON__('DBD::Pg::db do failed: ERROR: column "stavalues1" has pseudo...', 'DBI::db=HASH(0x1f25c38)', undef) called at ./pg_sample line 538
Dropping sample schema _pg_sample
Done.
Command:
./pg_sample dbname --data-only --file=test.sql --limit="ja_admins = 1000" --verbose
Would you know why do I get that error?
Cheers
On Wed, Mar 2, 2016 at 6:44 PM, drum.lucas@gmail.com <drum.lucas@gmail.com> wrote:
But, in my main DB i'm getting the error:Creating table "_pg_sample"."pg_catalog_pg_statistic" DBD::Pg::db do failed: ERROR: column "stavalues1" has pseudo-type "anyarray" at ./pg_sample line 296
main::__ANON__('DBD::Pg::db do failed: ERROR: column "stavalues1" has pseudo...', 'DBI::db=HASH(0x1f25c38)', undef) called at ./pg_sample line 538
Dropping sample schema _pg_sample
Done.Would you know why do I get that error?
Sorry, no idea. I know the author is quite responsive though. I had a few issues when I used it a year or two ago and he was really helpful.
wrote:But, in my main DB i'm getting the error:Creating table "_pg_sample"."pg_catalog_pg_statistic" DBD::Pg::db do failed: ERROR: column "stavalues1" has pseudo-type "anyarray" at ./pg_sample line 296
main::__ANON__('DBD::Pg::db do failed: ERROR: column "stavalues1" has pseudo...', 'DBI::db=HASH(0x1f25c38)', undef) called at ./pg_sample line 538
Dropping sample schema _pg_sample
Done.Would you know why do I get that error?Sorry, no idea. I know the author is quite responsive though. I had a few issues when I used it a year or two ago and he was really helpful.
Cool.. I'm already talking to him...
If someone else needs help with the same issue - have a look on the link above