Re: Issue with delete

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On Thu, Jun 24, 2021 at 5:08 AM Rohit Rajput <rht.rajput@xxxxxxxxx> wrote:
Good day everyone,

I have few tables where i need to delete above 50 million rows each. Since i dont want to delete them all in one shot and block my table for extended time, i am trying to use limit with delete but its giving me error every time. May i please get some assistance here? Thanks

Here is what i am running:

delete from mytable where id in (select id from mytable where condition=true limit 1000);

where i run this, i get following error:

    Error: current transaction is aborted, commands ignored until end of transaction block.
SQL state: 25P02.


I am running it in RDS.


TIA, Best,
Rohit

As others said, there is no limit with the UPDATE/DELETE statements in PostgreSQL. However, you can get around that using a common table _expression_ (CTE). We have a blog post on doing exactly this up at CrunchyData

https://blog.crunchydata.com/blog/simulating-update-or-delete-with-limit-in-postgres-ctes-to-the-rescue

Keith

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