LCOV - code coverage report
Current view: top level - src/backend/utils/error - csvlog.c (source / functions) Hit Total Coverage
Test: PostgreSQL 17devel Lines: 95 108 88.0 %
Date: 2024-04-20 03:11:03 Functions: 2 2 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*-------------------------------------------------------------------------
       2             :  *
       3             :  * csvlog.c
       4             :  *    CSV logging
       5             :  *
       6             :  * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
       7             :  * Portions Copyright (c) 1994, Regents of the University of California
       8             :  *
       9             :  *
      10             :  * IDENTIFICATION
      11             :  *    src/backend/utils/error/csvlog.c
      12             :  *
      13             :  *-------------------------------------------------------------------------
      14             :  */
      15             : 
      16             : #include "postgres.h"
      17             : 
      18             : #include "access/xact.h"
      19             : #include "lib/stringinfo.h"
      20             : #include "libpq/libpq-be.h"
      21             : #include "miscadmin.h"
      22             : #include "postmaster/syslogger.h"
      23             : #include "storage/lock.h"
      24             : #include "storage/proc.h"
      25             : #include "tcop/tcopprot.h"
      26             : #include "utils/backend_status.h"
      27             : #include "utils/guc.h"
      28             : #include "utils/ps_status.h"
      29             : 
      30             : 
      31             : /*
      32             :  * append a CSV'd version of a string to a StringInfo
      33             :  * We use the PostgreSQL defaults for CSV, i.e. quote = escape = '"'
      34             :  * If it's NULL, append nothing.
      35             :  */
      36             : static inline void
      37         338 : appendCSVLiteral(StringInfo buf, const char *data)
      38             : {
      39         338 :     const char *p = data;
      40             :     char        c;
      41             : 
      42             :     /* avoid confusing an empty string with NULL */
      43         338 :     if (p == NULL)
      44         160 :         return;
      45             : 
      46         178 :     appendStringInfoCharMacro(buf, '"');
      47        3522 :     while ((c = *p++) != '\0')
      48             :     {
      49        3344 :         if (c == '"')
      50          12 :             appendStringInfoCharMacro(buf, '"');
      51        3344 :         appendStringInfoCharMacro(buf, c);
      52             :     }
      53         178 :     appendStringInfoCharMacro(buf, '"');
      54             : }
      55             : 
      56             : /*
      57             :  * write_csvlog -- Generate and write CSV log entry
      58             :  *
      59             :  * Constructs the error message, depending on the Errordata it gets, in a CSV
      60             :  * format which is described in doc/src/sgml/config.sgml.
      61             :  */
      62             : void
      63          40 : write_csvlog(ErrorData *edata)
      64             : {
      65             :     StringInfoData buf;
      66          40 :     bool        print_stmt = false;
      67             : 
      68             :     /* static counter for line numbers */
      69             :     static long log_line_number = 0;
      70             : 
      71             :     /* has counter been reset in current process? */
      72             :     static int  log_my_pid = 0;
      73             : 
      74             :     /*
      75             :      * This is one of the few places where we'd rather not inherit a static
      76             :      * variable's value from the postmaster.  But since we will, reset it when
      77             :      * MyProcPid changes.
      78             :      */
      79          40 :     if (log_my_pid != MyProcPid)
      80             :     {
      81          22 :         log_line_number = 0;
      82          22 :         log_my_pid = MyProcPid;
      83          22 :         reset_formatted_start_time();
      84             :     }
      85          40 :     log_line_number++;
      86             : 
      87          40 :     initStringInfo(&buf);
      88             : 
      89             :     /* timestamp with milliseconds */
      90          40 :     appendStringInfoString(&buf, get_formatted_log_time());
      91          40 :     appendStringInfoChar(&buf, ',');
      92             : 
      93             :     /* username */
      94          40 :     if (MyProcPort)
      95          18 :         appendCSVLiteral(&buf, MyProcPort->user_name);
      96          40 :     appendStringInfoChar(&buf, ',');
      97             : 
      98             :     /* database name */
      99          40 :     if (MyProcPort)
     100          18 :         appendCSVLiteral(&buf, MyProcPort->database_name);
     101          40 :     appendStringInfoChar(&buf, ',');
     102             : 
     103             :     /* Process id  */
     104          40 :     if (MyProcPid != 0)
     105          40 :         appendStringInfo(&buf, "%d", MyProcPid);
     106          40 :     appendStringInfoChar(&buf, ',');
     107             : 
     108             :     /* Remote host and port */
     109          40 :     if (MyProcPort && MyProcPort->remote_host)
     110             :     {
     111          18 :         appendStringInfoChar(&buf, '"');
     112          18 :         appendStringInfoString(&buf, MyProcPort->remote_host);
     113          18 :         if (MyProcPort->remote_port && MyProcPort->remote_port[0] != '\0')
     114             :         {
     115           0 :             appendStringInfoChar(&buf, ':');
     116           0 :             appendStringInfoString(&buf, MyProcPort->remote_port);
     117             :         }
     118          18 :         appendStringInfoChar(&buf, '"');
     119             :     }
     120          40 :     appendStringInfoChar(&buf, ',');
     121             : 
     122             :     /* session id */
     123          40 :     appendStringInfo(&buf, "%lx.%x", (long) MyStartTime, MyProcPid);
     124          40 :     appendStringInfoChar(&buf, ',');
     125             : 
     126             :     /* Line number */
     127          40 :     appendStringInfo(&buf, "%ld", log_line_number);
     128          40 :     appendStringInfoChar(&buf, ',');
     129             : 
     130             :     /* PS display */
     131          40 :     if (MyProcPort)
     132             :     {
     133             :         StringInfoData msgbuf;
     134             :         const char *psdisp;
     135             :         int         displen;
     136             : 
     137          18 :         initStringInfo(&msgbuf);
     138             : 
     139          18 :         psdisp = get_ps_display(&displen);
     140          18 :         appendBinaryStringInfo(&msgbuf, psdisp, displen);
     141          18 :         appendCSVLiteral(&buf, msgbuf.data);
     142             : 
     143          18 :         pfree(msgbuf.data);
     144             :     }
     145          40 :     appendStringInfoChar(&buf, ',');
     146             : 
     147             :     /* session start timestamp */
     148          40 :     appendStringInfoString(&buf, get_formatted_start_time());
     149          40 :     appendStringInfoChar(&buf, ',');
     150             : 
     151             :     /* Virtual transaction id */
     152             :     /* keep VXID format in sync with lockfuncs.c */
     153          40 :     if (MyProc != NULL && MyProc->vxid.procNumber != INVALID_PROC_NUMBER)
     154          18 :         appendStringInfo(&buf, "%d/%u", MyProc->vxid.procNumber, MyProc->vxid.lxid);
     155          40 :     appendStringInfoChar(&buf, ',');
     156             : 
     157             :     /* Transaction id */
     158          40 :     appendStringInfo(&buf, "%u", GetTopTransactionIdIfAny());
     159          40 :     appendStringInfoChar(&buf, ',');
     160             : 
     161             :     /* Error severity */
     162          40 :     appendStringInfoString(&buf, _(error_severity(edata->elevel)));
     163          40 :     appendStringInfoChar(&buf, ',');
     164             : 
     165             :     /* SQL state code */
     166          40 :     appendStringInfoString(&buf, unpack_sql_state(edata->sqlerrcode));
     167          40 :     appendStringInfoChar(&buf, ',');
     168             : 
     169             :     /* errmessage */
     170          40 :     appendCSVLiteral(&buf, edata->message);
     171          40 :     appendStringInfoChar(&buf, ',');
     172             : 
     173             :     /* errdetail or errdetail_log */
     174          40 :     if (edata->detail_log)
     175           0 :         appendCSVLiteral(&buf, edata->detail_log);
     176             :     else
     177          40 :         appendCSVLiteral(&buf, edata->detail);
     178          40 :     appendStringInfoChar(&buf, ',');
     179             : 
     180             :     /* errhint */
     181          40 :     appendCSVLiteral(&buf, edata->hint);
     182          40 :     appendStringInfoChar(&buf, ',');
     183             : 
     184             :     /* internal query */
     185          40 :     appendCSVLiteral(&buf, edata->internalquery);
     186          40 :     appendStringInfoChar(&buf, ',');
     187             : 
     188             :     /* if printed internal query, print internal pos too */
     189          40 :     if (edata->internalpos > 0 && edata->internalquery != NULL)
     190           0 :         appendStringInfo(&buf, "%d", edata->internalpos);
     191          40 :     appendStringInfoChar(&buf, ',');
     192             : 
     193             :     /* errcontext */
     194          40 :     if (!edata->hide_ctx)
     195          40 :         appendCSVLiteral(&buf, edata->context);
     196          40 :     appendStringInfoChar(&buf, ',');
     197             : 
     198             :     /* user query --- only reported if not disabled by the caller */
     199          40 :     print_stmt = check_log_of_query(edata);
     200          40 :     if (print_stmt)
     201           4 :         appendCSVLiteral(&buf, debug_query_string);
     202          40 :     appendStringInfoChar(&buf, ',');
     203          40 :     if (print_stmt && edata->cursorpos > 0)
     204           2 :         appendStringInfo(&buf, "%d", edata->cursorpos);
     205          40 :     appendStringInfoChar(&buf, ',');
     206             : 
     207             :     /* file error location */
     208          40 :     if (Log_error_verbosity >= PGERROR_VERBOSE)
     209             :     {
     210             :         StringInfoData msgbuf;
     211             : 
     212           0 :         initStringInfo(&msgbuf);
     213             : 
     214           0 :         if (edata->funcname && edata->filename)
     215           0 :             appendStringInfo(&msgbuf, "%s, %s:%d",
     216             :                              edata->funcname, edata->filename,
     217             :                              edata->lineno);
     218           0 :         else if (edata->filename)
     219           0 :             appendStringInfo(&msgbuf, "%s:%d",
     220             :                              edata->filename, edata->lineno);
     221           0 :         appendCSVLiteral(&buf, msgbuf.data);
     222           0 :         pfree(msgbuf.data);
     223             :     }
     224          40 :     appendStringInfoChar(&buf, ',');
     225             : 
     226             :     /* application name */
     227          40 :     if (application_name)
     228          40 :         appendCSVLiteral(&buf, application_name);
     229             : 
     230          40 :     appendStringInfoChar(&buf, ',');
     231             : 
     232             :     /* backend type */
     233          40 :     appendCSVLiteral(&buf, get_backend_type_for_log());
     234          40 :     appendStringInfoChar(&buf, ',');
     235             : 
     236             :     /* leader PID */
     237          40 :     if (MyProc)
     238             :     {
     239          26 :         PGPROC     *leader = MyProc->lockGroupLeader;
     240             : 
     241             :         /*
     242             :          * Show the leader only for active parallel workers.  This leaves out
     243             :          * the leader of a parallel group.
     244             :          */
     245          26 :         if (leader && leader->pid != MyProcPid)
     246           0 :             appendStringInfo(&buf, "%d", leader->pid);
     247             :     }
     248          40 :     appendStringInfoChar(&buf, ',');
     249             : 
     250             :     /* query id */
     251          40 :     appendStringInfo(&buf, "%lld", (long long) pgstat_get_my_query_id());
     252             : 
     253          40 :     appendStringInfoChar(&buf, '\n');
     254             : 
     255             :     /* If in the syslogger process, try to write messages direct to file */
     256          40 :     if (MyBackendType == B_LOGGER)
     257           0 :         write_syslogger_file(buf.data, buf.len, LOG_DESTINATION_CSVLOG);
     258             :     else
     259          40 :         write_pipe_chunks(buf.data, buf.len, LOG_DESTINATION_CSVLOG);
     260             : 
     261          40 :     pfree(buf.data);
     262          40 : }

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