Re: Delete Enhancement Request

On 1/14/19 9:18 AM, Campbell, Lance wrote:
>
> Please consider adding this feature to PostgreSQL.
>
> Use Case:
>
> When deleting a large number of records with constraints and triggers
> PostgreSQL is exceptionally slow.
>
> Suggested change:
>
> I believe a way to speed this processes up would be to offer an option a
> user could “turn on” prior to doing the delete.
>
> Example: set delete-no-roll-back=true
>
> Now as PostgreSQL deletes rows it literally deletes them one at a time as
> though the user was only deleting a single row. This means that if cancel
> were executed on a delete action then it would only roll back the current
> row that PostgreSQL was in the process of deleting.  Example:  if you had
> 10 million row to delete and then pressed cancel after three minutes maybe
> 5 million are deleted.
>

You seem to be asking for an unlogged transaction, but that doesn't have
anything to do with efficiently deleting rows.

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