Hi,
On 2017-04-24 11:46:02 +0300, Konstantin Knizhnik wrote:
> So what I am thinking now is implicit query caching. If the same query with
> different literal values is repeated many times, then we can try to
> generalize this query and replace it with prepared query with
> parameters.
That's not actuall all that easy:
- You pretty much do parse analysis to be able to do an accurate match. How much overhead is parse analysis vs.
planningin your cases?
- The invalidation infrastructure for this, if not tied to to fully parse-analyzed statements, is going to be hell.
- Migrating to parameters can actually cause significant slowdowns, not nice if that happens implicitly.
Greetings,
Andres Freund
