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Use appendStringInfoString() where appropriate in elog.c.

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The nominally equivalent call appendStringInfo(buf, "%s", str) can be
significantly slower when str is large.  In particular, the former usage in
EVALUATE_MESSAGE led to O(N^2) behavior when collecting a large number of
context lines, as I found out while testing recursive functions.  The other
changes are just neatnik-ism and seem unlikely to save anything meaningful,
but a cycle shaved is a cycle earned.
This commit is contained in:
Tom Lane 2010-11-04 15:28:35 -04:00
parent 034967bdcb
commit 09211659d9
1 changed files with 29 additions and 22 deletions
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51
src/backend/utils/error/elog.c
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@ -667,8 +667,10 @@ errcode_for_socket_access(void)
/* Expand %m in format string */ \
fmtbuf = expand_fmt_string(fmt, edata); \
initStringInfo(&buf); \
if ((appendval) && edata->targetfield) \
appendStringInfo(&buf, "%s\n", edata->targetfield); \
if ((appendval) && edata->targetfield) { \
appendStringInfoString(&buf, edata->targetfield); \
appendStringInfoChar(&buf, '\n'); \
} \
/* Generate actual output --- have to use appendStringInfoVA */ \
for (;;) \
{ \
@ -708,8 +710,10 @@ errcode_for_socket_access(void)
/* Expand %m in format string */ \
fmtbuf = expand_fmt_string(fmt, edata); \
initStringInfo(&buf); \
if ((appendval) && edata->targetfield) \
appendStringInfo(&buf, "%s\n", edata->targetfield); \
if ((appendval) && edata->targetfield) { \
appendStringInfoString(&buf, edata->targetfield); \
appendStringInfoChar(&buf, '\n'); \
} \
/* Generate actual output --- have to use appendStringInfoVA */ \
for (;;) \
{ \
@ -1809,7 +1813,7 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
if (appname == NULL || *appname == '\0')
appname = _("[unknown]");
appendStringInfo(buf, "%s", appname);
appendStringInfoString(buf, appname);
}
break;
case 'u':
@ -1819,7 +1823,7 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
if (username == NULL || *username == '\0')
username = _("[unknown]");
appendStringInfo(buf, "%s", username);
appendStringInfoString(buf, username);
}
break;
case 'd':
@ -1829,7 +1833,7 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
if (dbname == NULL || *dbname == '\0')
dbname = _("[unknown]");
appendStringInfo(buf, "%s", dbname);
appendStringInfoString(buf, dbname);
}
break;
case 'c':
@ -1877,7 +1881,7 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
case 'r':
if (MyProcPort && MyProcPort->remote_host)
{
appendStringInfo(buf, "%s", MyProcPort->remote_host);
appendStringInfoString(buf, MyProcPort->remote_host);
if (MyProcPort->remote_port &&
MyProcPort->remote_port[0] != '\0')
appendStringInfo(buf, "(%s)",
@ -1886,7 +1890,7 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
break;
case 'h':
if (MyProcPort && MyProcPort->remote_host)
appendStringInfo(buf, "%s", MyProcPort->remote_host);
appendStringInfoString(buf, MyProcPort->remote_host);
break;
case 'q':
/* in postmaster and friends, stop if %q is seen */
@ -2004,9 +2008,12 @@ write_csvlog(ErrorData *edata)
if (MyProcPort && MyProcPort->remote_host)
{
appendStringInfoChar(&buf, '"');
appendStringInfo(&buf, "%s", MyProcPort->remote_host);
appendStringInfoString(&buf, MyProcPort->remote_host);
if (MyProcPort->remote_port && MyProcPort->remote_port[0] != '\0')
appendStringInfo(&buf, ":%s", MyProcPort->remote_port);
{
appendStringInfoChar(&buf, ':');
appendStringInfoString(&buf, MyProcPort->remote_port);
}
appendStringInfoChar(&buf, '"');
}
appendStringInfoChar(&buf, ',');
@ -2053,40 +2060,40 @@ write_csvlog(ErrorData *edata)
appendStringInfoChar(&buf, ',');
/* Error severity */
appendStringInfo(&buf, "%s", error_severity(edata->elevel));
appendStringInfoString(&buf, error_severity(edata->elevel));
appendStringInfoChar(&buf, ',');
/* SQL state code */
appendStringInfo(&buf, "%s", unpack_sql_state(edata->sqlerrcode));
appendStringInfoString(&buf, unpack_sql_state(edata->sqlerrcode));
appendStringInfoChar(&buf, ',');
/* errmessage */
appendCSVLiteral(&buf, edata->message);
appendStringInfoCharMacro(&buf, ',');
appendStringInfoChar(&buf, ',');
/* errdetail or errdetail_log */
if (edata->detail_log)
appendCSVLiteral(&buf, edata->detail_log);
else
appendCSVLiteral(&buf, edata->detail);
appendStringInfoCharMacro(&buf, ',');
appendStringInfoChar(&buf, ',');
/* errhint */
appendCSVLiteral(&buf, edata->hint);
appendStringInfoCharMacro(&buf, ',');
appendStringInfoChar(&buf, ',');
/* internal query */
appendCSVLiteral(&buf, edata->internalquery);
appendStringInfoCharMacro(&buf, ',');
appendStringInfoChar(&buf, ',');
/* if printed internal query, print internal pos too */
if (edata->internalpos > 0 && edata->internalquery != NULL)
appendStringInfo(&buf, "%d", edata->internalpos);
appendStringInfoCharMacro(&buf, ',');
appendStringInfoChar(&buf, ',');
/* errcontext */
appendCSVLiteral(&buf, edata->context);
appendStringInfoCharMacro(&buf, ',');
appendStringInfoChar(&buf, ',');
/* user query --- only reported if not disabled by the caller */
if (is_log_level_output(edata->elevel, log_min_error_statement) &&
@ -2095,10 +2102,10 @@ write_csvlog(ErrorData *edata)
print_stmt = true;
if (print_stmt)
appendCSVLiteral(&buf, debug_query_string);
appendStringInfoCharMacro(&buf, ',');
appendStringInfoChar(&buf, ',');
if (print_stmt && edata->cursorpos > 0)
appendStringInfo(&buf, "%d", edata->cursorpos);
appendStringInfoCharMacro(&buf, ',');
appendStringInfoChar(&buf, ',');
/* file error location */
if (Log_error_verbosity >= PGERROR_VERBOSE)
@ -2117,7 +2124,7 @@ write_csvlog(ErrorData *edata)
appendCSVLiteral(&buf, msgbuf.data);
pfree(msgbuf.data);
}
appendStringInfoCharMacro(&buf, ',');
appendStringInfoChar(&buf, ',');
/* application name */
if (application_name)