Hi, Le 13 août 2015 9:51 PM, "Jeff Janes" <jeff.ja...@gmail.com> a écrit : > > I am looking for an extension or a technique that will allow me to intercept a query by the exact query text, and replace that query with a different one. > > The context is running a third-party app which issues queries I have no control over. I'd like to intercept a specific query (which has no bind parameters) and either replace the query text with a different text which, for example, swaps out an "in list" clause to instead be an "exists (subquery)". > > Or just wrap the query in a "set enable_* =off;" or "set work_mem=*;" before and a reset of it after. > > Is there anything out there like this? This would be for 9.4. > > I'm willing to put the query text, and its replacement, directly into the extension source code and compile it, but of course something more flexible would be ideal. >
I know of no extension that does this, even if the idea is rather interesting. I don't remember if there is any hook that would allow such a thing. But that is definitely interesting. -- Guillaume.
