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Add csvlog output for the new query_id value 

This also adjusts the printf format for query id used by log_line_prefix
(%Q).

Reported-by: Justin Pryzby

Discussion: https://postgr.es/m/20210408005402.GG24239@momjian.us

Author: Julien Rouhaud, Bruce Momjian
This commit is contained in:
Bruce Momjian 2021-04-07 22:30:30 -04:00
parent 5100010ee4
commit f57a2f5e03
3 changed files with 13 additions and 6 deletions
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4
doc/src/sgml/config.sgml
View File

@ -7310,7 +7310,8 @@ log_line_prefix = '%m [%p] %q%u@%d/%a '
character count of the error position therein,
location of the error in the PostgreSQL source code
(if <varname>log_error_verbosity</varname> is set to <literal>verbose</literal>),
application name, backend type, and process ID of parallel group leader.
application name, backend type, process ID of parallel group leader,
and query id.
Here is a sample table definition for storing CSV-format log output:
<programlisting>
@ -7341,6 +7342,7 @@ CREATE TABLE postgres_log
application_name text,
backend_type text,
leader_pid integer,
query_id bigint,
PRIMARY KEY (session_id, session_line_num)
);
</programlisting>

3
doc/src/sgml/file-fdw.sgml
View File

@ -266,7 +266,8 @@ CREATE FOREIGN TABLE pglog (
location text,
application_name text,
backend_type text,
leader_pid integer
leader_pid integer,
query_id bigint
) SERVER pglog
OPTIONS ( filename 'log/pglog.csv', format 'csv' );
</programlisting>

12
src/backend/utils/error/elog.c
View File

@ -2716,11 +2716,11 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
break;
case 'Q':
if (padding != 0)
appendStringInfo(buf, "%*ld", padding,
pgstat_get_my_queryid());
appendStringInfo(buf, "%*lld", padding,
(long long) pgstat_get_my_queryid());
else
appendStringInfo(buf, "%ld",
pgstat_get_my_queryid());
appendStringInfo(buf, "%lld",
(long long) pgstat_get_my_queryid());
break;
default:
/* format error - ignore it */
@ -2964,6 +2964,10 @@ write_csvlog(ErrorData *edata)
if (leader && leader->pid != MyProcPid)
appendStringInfo(&buf, "%d", leader->pid);
}
appendStringInfoChar(&buf, ',');
/* query id */
appendStringInfo(&buf, "%lld", (long long) pgstat_get_my_queryid());
appendStringInfoChar(&buf, '\n');