On 10/10/2014 10:42 AM, "Leonardo M. Ramé" wrote:
El 10/10/14 a las 14:37, Adrian Klaver escibió:
On 10/10/2014 10:27 AM, "Leonardo M. Ramé" wrote:
Hi, today I needed to re-create certain records deleted from a mysql
database, so I restored an old backup, opened a terminal and logged in
to the old database using the "mysql" command line utility, then opened
a new terminal with mysql connected to the production database. Then did
a "select * from table where id=xxx \G;" to display a record, then, on
the other terminal I had to write "insert into table(field1,
field2,...,fieldN) values(...);" for each record.
While doing that I tought of a neat feature that psql could provide,
that is something like "\insert for select * from table where id=xxx;"
this should create the insert command for the requested query.
Is such a thing already present in psql?.
I may be missing something but:
http://www.postgresql.org/docs/9.3/interactive/sql-insert.html
INSERT INTO films SELECT * FROM tmp_films WHERE date_prod < '2004-05-07';
or are you thinking of something that takes a SELECT query and turns
it into a series of INSERT queries.
The only way I can of doing this is to use pg_dump -t some_table -a
--inserts or --column-inserts
The problem is I needed the make the insert statements in another
database, not the one I was connected to for soing the select.
Another Postgres database or some other type.
The pg_dump could help in part, because after creating it I need to
delete all the unneeded records.
Well in Postgres 9.3+ you have the PROGRAM option to COPY that allows
you to pipe to/from an external program for further processing. In 9.2-
you could still use COPY to output to a CSV format say and then process
in a separate step. This could be done in a transaction in either case,
where the last step is a DELETE. Though whatever happens outside the
database would not be covered by the transaction.
Again if you are in 9.3+ you would be able to use the Postgres FDW to
write from one Postgres database to another. Otherwise you could use dblink:
http://www.postgresql.org/docs/9.3/interactive/dblink.html
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
--
Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general
