Hi,
from time to time I need to correlate PostgreSQL logs to other logs,
containing numeric timestamps - a prime example of that is pgbench. With
%t and %m that's not quite trivial, because of timezones etc.
I propose adding two new log_line_prefix escape sequences - %T and %M,
doing the same thing as %t and %m, but formatting the value as a number.
Patch attached, I'll add it to CF 2015-06.
regards
--
Tomas Vondra http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index b30c68d..7f39b18 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -4636,11 +4636,21 @@ local0.* /var/log/postgresql
<entry>no</entry>
</row>
<row>
+ <entry><literal>%T</literal></entry>
+ <entry>Time stamp without milliseconds (as a numer)</entry>
+ <entry>no</entry>
+ </row>
+ <row>
<entry><literal>%m</literal></entry>
<entry>Time stamp with milliseconds</entry>
<entry>no</entry>
</row>
<row>
+ <entry><literal>%M</literal></entry>
+ <entry>Time stamp with milliseconds (as a number)</entry>
+ <entry>no</entry>
+ </row>
+ <row>
<entry><literal>%i</literal></entry>
<entry>Command tag: type of session's current command</entry>
<entry>yes</entry>
diff --git a/src/backend/utils/error/elog.c b/src/backend/utils/error/elog.c
index b952c7c..abafdd9 100644
--- a/src/backend/utils/error/elog.c
+++ b/src/backend/utils/error/elog.c
@@ -2428,6 +2428,19 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
else
appendStringInfoString(buf, formatted_log_time);
break;
+ case 'M':
+ {
+ struct timeval tv;
+ char timestamp_str[FORMATTED_TS_LEN];
+
+ gettimeofday(&tv, NULL);
+
+ sprintf(timestamp_str, "%ld.%.03d",
+ tv.tv_sec, (int)(tv.tv_usec / 1000));
+
+ appendStringInfoString(buf, timestamp_str);
+ }
+ break;
case 't':
{
pg_time_t stamp_time = (pg_time_t) time(NULL);
@@ -2442,6 +2455,18 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
appendStringInfoString(buf, strfbuf);
}
break;
+ case 'T':
+ {
+ struct timeval tv;
+ char timestamp_str[FORMATTED_TS_LEN];
+
+ gettimeofday(&tv, NULL);
+
+ sprintf(timestamp_str, "%ld", tv.tv_sec);
+
+ appendStringInfoString(buf, timestamp_str);
+ }
+ break;
case 's':
if (formatted_start_time[0] == '\0')
setup_formatted_start_time();
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index 110983f..e448dd0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -425,7 +425,9 @@
# %h = remote host
# %p = process ID
# %t = timestamp without milliseconds
+ # %T = timestamp without milliseconds (as a number)
# %m = timestamp with milliseconds
+ # %M = timestamp with milliseconds (as a number)
# %i = command tag
# %e = SQL state
# %c = session ID
--
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