Thread: Why csvlog logs contexts without leading tab?
Had a simple function calling another function, and the final function
was doing raise log.
When I enabled normal stderr logging, with absurdly full
log_line_prefix, I got this:
#v+
a[psql] u[depesz] d[depesz] r[[local]] h[[local]] p[15444] t[2012-09-13 21:49:37 CEST] m[2012-09-13 21:49:37.840 CEST]
i[SELECT]e[00000] c[505238d0.3c54] l[3] s[2012-09-13 21:49:36 CEST] v[2/2] x[0] LOG: [logged line]
a[psql] u[depesz] d[depesz] r[[local]] h[[local]] p[15444] t[2012-09-13 21:49:37 CEST] m[2012-09-13 21:49:37.840 CEST]
i[SELECT]e[00000] c[505238d0.3c54] l[4] s[2012-09-13 21:49:36 CEST] v[2/2] x[0] CONTEXT: SQL statement "SELECT b()"
PL/pgSQL function a() line 1 at PERFORM
a[psql] u[depesz] d[depesz] r[[local]] h[[local]] p[15444] t[2012-09-13 21:49:37 CEST] m[2012-09-13 21:49:37.840 CEST]
i[SELECT]e[00000] c[505238d0.3c54] l[5] s[2012-09-13 21:49:36 CEST] v[2/2] x[0] STATEMENT: select a();
a[psql] u[depesz] d[depesz] r[[local]] h[[local]] p[15444] t[2012-09-13 21:49:37 CEST] m[2012-09-13 21:49:37.841 CEST]
i[SELECT]e[00000] c[505238d0.3c54] l[6] s[2012-09-13 21:49:36 CEST] v[2/0] x[0] LOG: duration: 1.662 ms statement:
selecta();
#v-
same function call, with syslog:
#v+
Sep 13 21:53:31 h3po4 postgres[16156]: [4-1] a[psql] u[depesz] d[depesz] r[[local]] h[[local]] p[16156] t[2012-09-13
21:53:31CEST] m[2012-09-13 21:53:31.852 CEST] i[SELECT] e[00000] c[505239bb.3f1c] l[3] s[2012-09-13 21:53:31 CEST]
v[2/4]x[0] LOG: [logged line]
Sep 13 21:53:31 h3po4 postgres[16156]: [4-2] a[psql] u[depesz] d[depesz] r[[local]] h[[local]] p[16156] t[2012-09-13
21:53:31CEST] m[2012-09-13 21:53:31.852 CEST] i[SELECT] e[00000] c[505239bb.3f1c] l[4] s[2012-09-13 21:53:31 CEST]
v[2/4]x[0] CONTEXT: SQL statement "SELECT b()"
Sep 13 21:53:31 h3po4 postgres[16156]: [4-3] #011PL/pgSQL function a() line 1 at PERFORM
Sep 13 21:53:31 h3po4 postgres[16156]: [4-4] a[psql] u[depesz] d[depesz] r[[local]] h[[local]] p[16156] t[2012-09-13
21:53:31CEST] m[2012-09-13 21:53:31.852 CEST] i[SELECT] e[00000] c[505239bb.3f1c] l[5] s[2012-09-13 21:53:31 CEST]
v[2/4]x[0] STATEMENT: select a();
Sep 13 21:53:31 h3po4 postgres[16156]: [5-1] a[psql] u[depesz] d[depesz] r[[local]] h[[local]] p[16156] t[2012-09-13
21:53:31CEST] m[2012-09-13 21:53:31.852 CEST] i[SELECT] e[00000] c[505239bb.3f1c] l[6] s[2012-09-13 21:53:31 CEST]
v[2/0]x[0] LOG: duration: 1.599 ms statement: select a();
#v-
Please note that the 3rd line in both examples has leading tab - either
literal tab in case of stderr log, or #011 in case of syslog.
But with csvlog, I got something different:
#v+
2012-09-13 21:51:12.642 CEST,"depesz","depesz",15673,"[local]",5052392f.3d39,3,"SELECT",2012-09-13 21:51:11
CEST,2/2,0,LOG,00000,"[loggedline]",,,,,"SQL statement ""SELECT b()""
PL/pgSQL function a() line 1 at PERFORM","select a();",,,"psql"
2012-09-13 21:51:12.642 CEST,"depesz","depesz",15673,"[local]",5052392f.3d39,4,"SELECT",2012-09-13 21:51:11
CEST,2/0,0,LOG,00000,"duration:1.561 ms statement: select a();",,,,,,,,,"psql"
#v-
There is no leading tab on the 2nd line. Why? Is it intentional, or just
an omission?
Best regards,
depesz
--
The best thing about modern society is how easy it is to avoid contact with it.
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hubert depesz lubaczewski wrote: > When I enabled normal stderr logging, with absurdly full > log_line_prefix, I got this: > a[psql] u[depesz] d[depesz] r[[local]] h[[local]] p[15444] t[2012-09-13 21:49:37 CEST] m[2012-09-13 > 21:49:37.840 CEST] i[SELECT] e[00000] c[505238d0.3c54] l[4] s[2012-09-13 21:49:36 CEST] v[2/2] x[0] > CONTEXT: SQL statement "SELECT b()" > PL/pgSQL function a() line 1 at PERFORM > same function call, with syslog: > Sep 13 21:53:31 h3po4 postgres[16156]: [4-2] a[psql] u[depesz] d[depesz] r[[local]] h[[local]] > p[16156] t[2012-09-13 21:53:31 CEST] m[2012-09-13 21:53:31.852 CEST] i[SELECT] e[00000] > c[505239bb.3f1c] l[4] s[2012-09-13 21:53:31 CEST] v[2/4] x[0] CONTEXT: SQL statement "SELECT b()" > Sep 13 21:53:31 h3po4 postgres[16156]: [4-3] #011PL/pgSQL function a() line 1 at PERFORM > Please note that the 3rd line in both examples has leading tab - either > literal tab in case of stderr log, or #011 in case of syslog. > > But with csvlog, I got something different: > 2012-09-13 21:51:12.642 CEST,"depesz","depesz",15673,"[local]",5052392f.3d39,3,"SELECT",2012-09-13 > 21:51:11 CEST,2/2,0,LOG,00000,"[logged line]",,,,,"SQL statement ""SELECT b()"" > PL/pgSQL function a() line 1 at PERFORM","select a();",,,"psql" > There is no leading tab on the 2nd line. Why? Is it intentional, or just > an omission? I think that the current behaviour makes sense. The actual context message did not have a tab in it, just a line break. In CSV you can leave it like that, because the quoting will make it clear that the line break is not the start of a new log entry. In the other two cases a tab is added to distinguish a line break (or new message for syslog) that starts a new log entry from a line break that is part of a log entry. This makes automatic parsing of log files possible: if a line starts with a tab, it is a continuation line. The tab itself is not part of the message. Yours, Laurenz Albe
On Fri, Sep 21, 2012 at 11:54:27AM +0200, Albe Laurenz wrote:
> This makes automatic parsing of log files possible:
> if a line starts with a tab, it is a continuation line.
> The tab itself is not part of the message.
why the tab isn't appended for other multi-line messages? like queries
in LOG: duration: statement: lines?
Best regards,
depesz
--
The best thing about modern society is how easy it is to avoid contact with it.
http://depesz.com/
depesz wrote:
>> This makes automatic parsing of log files possible:
>> if a line starts with a tab, it is a continuation line.
>> The tab itself is not part of the message.
> why the tab isn't appended for other multi-line messages? like queries
> in LOG: duration: statement: lines?
I'm not sure what you mean...
I tried:
test=# SET log_min_duration_statement=0;
test=# SELECT 42,
test-# 'newline';
And got this in the log:
LOG: duration: 0.407 ms statement: SELECT 42,
'newline';
So there is a tab prepended.
Yours,
Laurenz Albe
On Fri, Sep 21, 2012 at 12:25:09PM +0200, Albe Laurenz wrote:
> So there is a tab prepended.
Sorry, you're right.
Best regards,
depesz
--
The best thing about modern society is how easy it is to avoid contact with it.
http://depesz.com/