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pg_truncate_log_message.c
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pg_truncate_log_message.c
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#include <limits.h>
#include "postgres.h"
#include "fmgr.h"
#include "utils/builtins.h"
#include "utils/guc.h"
#include "miscadmin.h"
#include "mb/pg_wchar.h"
PG_MODULE_MAGIC;
void _PG_init(void);
void _PG_fini(void);
void emit_log_hook_impl(ErrorData *edata);
static emit_log_hook_type prev_emit_log_hook = NULL;
static int32 pg_truncate_log_message_max_length = -1;
void
emit_log_hook_impl(ErrorData *edata)
{
int len, cliplen;
char* c;
if (pg_truncate_log_message_max_length >= 0 && edata->message)
{
len = strlen(edata->message);
if (len > pg_truncate_log_message_max_length)
{
cliplen = pg_mbcliplen(edata->message,
pg_truncate_log_message_max_length, len);
*(edata->message + cliplen) = '\0';
edata->hide_stmt = true;
}
}
if (prev_emit_log_hook)
prev_emit_log_hook(edata);
}
void
_PG_init(void)
{
if (! process_shared_preload_libraries_in_progress)
return;
prev_emit_log_hook = emit_log_hook;
emit_log_hook = emit_log_hook_impl;
DefineCustomIntVariable("pg_truncate_log_message.max_length",
"Sets log message truncation threshold (byte)", NULL,
&pg_truncate_log_message_max_length, -1, -1, INT_MAX,
PGC_SUSET,
#if PG_VERSION_NUM < 110000
NULL,
#else
GUC_UNIT_BYTE,
#endif
NULL, NULL, NULL);
elog(DEBUG1, "pg_truncate_log_message loaded");
}
void
_PG_fini(void)
{
emit_log_hook = prev_emit_log_hook;
}