I read the article while translated using Google Translate, so my apologies if I got "lost" ;-)
In the section "Additional performance recommendations" you mention "Instead of temporary tables in Postgres, use the field" (in original "Místo dočasných tabulek v Postgres používejte pole"). Can you please explain what this "field" (pole) is?
We use temporary tables extensively, and alternatives are very welcome.
Thank you.