Re: psql generate insert command based on select

On Oct 10, 2014, at 1:52 PM, Leonardo M. Ramé <l(dot)rame(at)griensu(dot)com> wrote:

>
> El 10/10/14 a las 14:50, vibhor(dot)kumar(at)enterprisedb(dot)com escibió:
>>
>> On Oct 10, 2014, at 1:27 PM, Leonardo M. Ramé <l(dot)rame(at)griensu(dot)com> 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.
>>
>> You can do something like given below:
>> CREATE TABLE temp_generate_inserts AS SELECT * FROM table id=xx
>> Then use pg_dump --column-inserts -t temp_generate_inserts db1|psql db2
>> and later you can drop temp_generate_inserts table.
>>
>> With this you can also explore dblink_build_sql_insert function which comes with dblink module:
>> http://www.postgresql.org/docs/9.3/interactive/contrib-dblink-build-sql-insert.html
>>
>
> Nice!, I didn't know the create table...as select... command.

Still I think optimal way of doing this will be to use COPY command something like given below:
psql -c “COPY (SELECT * FROM table WHERE id=xxx) TO STDOUT” -d db1|psql -c “COPY tablename FROM STDIN” -d db2

with this, you can also explore postgresql_fdw if that helps.

Thanks & Regards,
Vibhor Kumar
(EDB) EnterpriseDB Corporation
The Postgres Database Company
Blog:http://vibhork.blogspot.com