Re: Moving delta data faster

On 4/3/24 13:38, yudhi s wrote:
>  Hi All,
>  It's postgresql database version 15.4. We have a requirement in which
> we will be initially moving full table data for 3-4 tables, from source
> database to target(i.e. postgres) . Maximum number of rows will be
> ~10million rows in those tables. Then subsequently these rows will be
> inserted/updated based on the delta number of rows that got
> inserted/updated in the source database. In some cases these changed
> data can flow multiple times per day to the downstream i.e. postgres
> database and in other cases once daily.

What is the source database?

Can it be reached with a FDW?:

https://wiki.postgresql.org/wiki/Foreign_data_wrappers

Can the delta on the source be output as CSV?

>
>  Want to understand , if we should use upsert(insert on conflict) or
> merge statements or anything else in such a scenario so as to persist
> those delta records faster in the target database, while making the
> system online to the users?
>
> Regards
> Yudhi

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com