Thread: How to create an archive for old records?

Hi all,

I am looking for ways to create an archive of records older than 3 months in
one of my table, and store these extracted records into a local database.
Does Postgres have any command to do this?

Thanks.

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On 02/14/07 19:11, carter ck wrote:
> Hi all,
>
> I am looking for ways to create an archive of records older than 3
> months in one of my table, and store these extracted records into a
> local database. Does Postgres have any command to do this?

A single command that will copy data to a destination database, and
then delete from the source database?

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Ron Johnson wrote:
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> On 02/14/07 19:11, carter ck wrote:
>> Hi all,
>>
>> I am looking for ways to create an archive of records older than 3
>> months in one of my table, and store these extracted records into a
>> local database. Does Postgres have any command to do this?
>
> A single command that will copy data to a destination database, and
> then delete from the source database?
>
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> TIP 9: In versions below 8.0, the planner will ignore your desire to
>        choose an index scan if your joining column's datatypes do not
>        match
>
>

I think the problem may be in determining when a record was added to the
table. If there is no 'date added' column as part of your table
specification that you populate when adding a row then is there any way
to determine when a record was added?

If there is a date added (which is a standard I put in all tables I use)
then it should be a fairly straight forward task of doing an INSERT INTO
followed by a DELETE FROM. As for a single command... I'm not aware of
any "INSERT INTO AND DELETE ORIGINAL" variant so it would have to be two
SQL commands, albeit it uncomplicated.

--
Paul Lambert
Database Administrator
AutoLedgers

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On 02/14/07 19:34, Paul Lambert wrote:
> Ron Johnson wrote:
> On 02/14/07 19:11, carter ck wrote:
>>>> Hi all,
>>>>
>>>> I am looking for ways to create an archive of records older than 3
>>>> months in one of my table, and store these extracted records into a
>>>> local database. Does Postgres have any command to do this?
>
> A single command that will copy data to a destination database, and
> then delete from the source database?
>
> I think the problem may be in determining when a record was added to the
> table. If there is no 'date added' column as part of your table
> specification that you populate when adding a row then is there any way
> to determine when a record was added?
>
> If there is a date added (which is a standard I put in all tables I use)
> then it should be a fairly straight forward task of doing an INSERT INTO
> followed by a DELETE FROM. As for a single command... I'm not aware of
> any "INSERT INTO AND DELETE ORIGINAL" variant so it would have to be two
> SQL commands, albeit it uncomplicated.

But that falls down when you need to archive 60M records and not
block any other jobs.


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