Re: ToDo: fast update of arrays with fixed length fields for PL/pgSQL - Mailing list pgsql-hackers

Hi,

On 2013-10-02 18:56:51 +0200, Pavel Stehule wrote:
> Hello
> 
> this proposal is related to reported issue
> http://www.postgresql.org/message-id/E1VQuta-0007Y4-Ip@wrigleys.postgresql.org
> 
> 
> We can directly modify any fields of int, float, double arrays (when result
> size will be immutable). This trick is used now for acceleration of some
> aggregates.
> 
> Ideas, comments?

A specific array might be located directly on a buffer - starting to
manipulate them inplace will lead to havoc in such scenarios. I don't
think we have the infrastructure for detecting such cases.

Greetings,

Andres Freund

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