Re: Backing Up Partial Databases

[Shane Ambler <pgsql(at)007Marketing(dot)com>]

Duncan McDonald wrote:
> Hi All,
>
> I was wondering whether there was a way to back up partial sets of data 
> as INSERT statements? Pg_dump seems only to handle whole databases or 
> tables.
>
> I have two identical databases (primary and backup) and I need to 
> transfer a small portion of missing data from one to the other. Is there 
> an easier way to do this rather than SELECT-ing the interval then 
> parsing the ouput to look like INSERT statements?

I can think of a couple of ways -

COPY (SELECT * FROM myPrimaryTable WHERE id<200) TO '/tmp/myData';

you can then

COPY myBackupTable FROM '/tmp/myData';


Another option is to create a table to hold the selected rows then
SELECT * INTO myTempTable FROM myPrimaryTable WHERE id<200;

then use pg_dump --table=myTempTable > /tmp/myData

the --inserts option of pg_dump will export as INSERT's if that is the 
way you want to do it. You will need to do a find and replace on the 
INSERT's to change the table name though.


--

Shane Ambler
pgSQL(at)007Marketing(dot)com

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