Обсуждение: Get current trasanction id
Hello, is there any way to get current transaction id using plpgsql or sql ? Thanks in advance for any help. ML
O Marek Lewczuk έγραψε στις Dec 27, 2004 : > Hello, > is there any way to get current transaction id using plpgsql or sql ? Maybe write a C function which calls GetCurrentTransactionId(). > > Thanks in advance for any help. > > ML > > > > ---------------------------(end of broadcast)--------------------------- > TIP 8: explain analyze is your friend > -- -Achilleus
On Mon, Dec 27, 2004 at 09:52:57AM +0100, Marek Lewczuk wrote: > is there any way to get current transaction id using plpgsql or sql ? A couple of people have posted suggestions but I'll ask a question: Why do you want the transaction ID? What problem are you trying to solve? -- Michael Fuhr http://www.fuhr.org/~mfuhr/
Michael Fuhr napisał(a): > On Mon, Dec 27, 2004 at 09:52:57AM +0100, Marek Lewczuk wrote: > > >>is there any way to get current transaction id using plpgsql or sql ? > > > A couple of people have posted suggestions but I'll ask a question: > > Why do you want the transaction ID? What problem are you trying > to solve? > Michael, I've already solved the problem - I found somewhere on the web a very simple C function, which returns transaction id. I need transaction id for plperl functions setVar, getVar (using $_SHARED array). Functions can write/read variables which are available either for connection or transaction. Regards, ML
I'm sure there's many tricky ways, but one simple way would be to insert a row into a table and then grab its XMIN value... Hope this helps, On Mon, Dec 27, 2004 at 09:52:57AM +0100, Marek Lewczuk wrote: > Hello, > is there any way to get current transaction id using plpgsql or sql ? > > Thanks in advance for any help. > > ML > > > > ---------------------------(end of broadcast)--------------------------- > TIP 2: you can get off all lists at once with the unregister command > (send "unregister YourEmailAddressHere" to majordomo@postgresql.org) -- Martijn van Oosterhout <kleptog@svana.org> http://svana.org/kleptog/ > Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a > tool for doing 5% of the work and then sitting around waiting for someone > else to do the other 95% so you can sue them.