Re: [HACKERS] Help! - Slony-I - saving/setting/restoring GUC
[EMAIL PROTECTED] (Tom Lane) writes: > Chris Browne <[EMAIL PROTECTED]> writes: >> Unfortunately (perhaps) standards_conforming_strings does not appear >> to be exported, so I'm not sure how to do this otherwise. > > Perhaps your problem is one of spelling? It's > "standard_conforming_strings", and it's certainly a global variable. > > You still haven't explained why you need this, though. There are > no datatype output functions that examine this variable. Apologies. I was reading too much into the problem report. After some discussion on IRC, I think we've "simplified" things back to what the problem is. Our logtrigger() function is already applying a "non-SCS" policy to quote backslashes. No need to declare anything there, as had been the case with a recent DateStyle issue. With DateStyle, we had to control the style in two places: 1. In logtrigger(), when PostgreSQL is asked to generate the string version of a datestamp. We do so by temporarily setting DateStyle. 2. When loading data, we need to make sure the connection uses a consistent DateStyle. We do so by setting the GUC variable using SET. I was under the misapprehension that we needed something akin to that step 1; apparently we only need worry about step 2. To which Peter's suggestion is entirely sufficient. Sorry about the confusion. -- let name="cbbrowne" and tld="ntlug.org" in name ^ "@" ^ tld;; http://cbbrowne.com/info/internet.html "Who is General Failure and why is he reading my hard disk?" -- <[EMAIL PROTECTED]>, Felix von Leitner ---(end of broadcast)--- TIP 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq
Re: [HACKERS] Help! - Slony-I - saving/setting/restoring GUC
Chris Browne <[EMAIL PROTECTED]> writes: > Unfortunately (perhaps) standards_conforming_strings does not appear > to be exported, so I'm not sure how to do this otherwise. Perhaps your problem is one of spelling? It's "standard_conforming_strings", and it's certainly a global variable. You still haven't explained why you need this, though. There are no datatype output functions that examine this variable. regards, tom lane ---(end of broadcast)--- TIP 1: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
Re: [HACKERS] Help! - Slony-I - saving/setting/restoring GUC
[EMAIL PROTECTED] (Peter Eisentraut) writes: > Chris Browne wrote: >> In support of PG 8.2, we need to have the log trigger function do the >> following: >> - Save value of standards_conforming_string >> - Set value of standards_conforming_string to FALSE >> - proceed with saving data to sl_log_? >> - Recover value of standards_conforming_string > > Would SET LOCAL help you? Not really. The log trigger function is an SPI function, and I don't think I want to be invoking an extra SQL request every time a tuple is updated. Consider our present handling of date localizations... Slony-I prefers to operate using ISO dates. So the log trigger function must force the datestyle correspondingly. So our code looks like... (eliding irrelevant code) int OldDateStyle = DateStyle; DateStyle = USE_ISO_DATES; /* code that generates data to stow in sl_log_n */ DateStyle = OldDateStyle; /* Retrieve user's local settings */ --- At one point, I thought that we'd modify this to: int OldDateStyle = DateStyle; int OldSCS = standards_conforming_strings; DateStyle = USE_ISO_DATES; standards_conforming_strings = FALSE; /* code that generates data to stow in sl_log_n */ DateStyle = OldDateStyle; /* Retrieve user's local settings */ standards_conforming_strings = OldSCS; Unfortunately (perhaps) standards_conforming_strings does not appear to be exported, so I'm not sure how to do this otherwise. -- (reverse (concatenate 'string "gro.mca" "@" "enworbbc")) http://www.ntlug.org/~cbbrowne/wp.html Editing is a rewording activity. -- Alan J. Perlis [And EMACS a rewording editor. Ed.] ---(end of broadcast)--- TIP 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq
Re: [HACKERS] Help! - Slony-I - saving/setting/restoring GUC
Chris Browne <[EMAIL PROTECTED]> writes: > In support of PG 8.2, we need to have the log trigger function do the > following: > - Save value of standards_conforming_string > - Set value of standards_conforming_string to FALSE This is a good idea why exactly? What are you even expecting it to do? The backend doesn't use standard_conforming_strings to determine any output, other than in ruleutils.c which I didn't think Slony uses. regards, tom lane ---(end of broadcast)--- TIP 1: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
Re: [HACKERS] Help! - Slony-I - saving/setting/restoring GUC
Chris Browne wrote: > In support of PG 8.2, we need to have the log trigger function do the > following: > - Save value of standards_conforming_string > - Set value of standards_conforming_string to FALSE > - proceed with saving data to sl_log_? > - Recover value of standards_conforming_string Would SET LOCAL help you? -- Peter Eisentraut http://developer.postgresql.org/~petere/ ---(end of broadcast)--- TIP 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq
[HACKERS] Help! - Slony-I - saving/setting/restoring GUC
In support of PG 8.2, we need to have the log trigger function do the following: - Save value of standards_conforming_string - Set value of standards_conforming_string to FALSE - proceed with saving data to sl_log_? - Recover value of standards_conforming_string The variable, standards_conforming_string, does not appear to be widely exported, but rather seems pretty localized to guc.c This is the prime thing holding us from RC2. Tom, Peter, you have touched guc.c in the context of standards_conforming_string; perahps you can suggest something? Darcy and I aren't seeing what to do... -- let name="cbbrowne" and tld="cbbrowne.com" in name ^ "@" ^ tld;; http://www3.sympatico.ca/cbbrowne/ Why do we drive on parkways and park on driveways? ---(end of broadcast)--- TIP 4: Have you searched our list archives? http://archives.postgresql.org
