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#define ESCAPE_CHAR '\\'
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#define SEPARATOR_CHAR ','
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namespace drizzle_plugin
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static bool sysvar_logging_query_enable= false;
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static char* sysvar_logging_query_filename= NULL;
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static char* sysvar_logging_query_pcre= NULL;
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/* TODO fix these to not be unsigned long once we have sensible sys_var system */
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static uint32_constraint sysvar_logging_query_threshold_slow;
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static uint32_constraint sysvar_logging_query_threshold_big_resultset;
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static uint32_constraint sysvar_logging_query_threshold_big_examined;
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static unsigned long sysvar_logging_query_threshold_slow= 0;
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static unsigned long sysvar_logging_query_threshold_big_resultset= 0;
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static unsigned long sysvar_logging_query_threshold_big_examined= 0;
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/* stolen from mysys/my_getsystime
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until the Session has a good utime "now" we can use
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will have to use this instead */
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static uint64_t get_microtime()
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#if defined(HAVE_GETHRTIME)
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return gethrtime()/1000;
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The following loop is here because gettimeofday may fail on some systems
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while (gettimeofday(&t, NULL) != 0) {}
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newtime= (uint64_t)t.tv_sec * 1000000 + t.tv_usec;
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#endif /* defined(HAVE_GETHRTIME) */
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/* quote a string to be safe to include in a CSV line
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that means backslash quoting all commas, doublequotes, backslashes,
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Logging_query(const std::string &filename,
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const std::string &query_pcre) :
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drizzled::plugin::Logging("Logging_query"),
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_query_pcre(query_pcre),
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fd(-1), re(NULL), pe(NULL),
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formatter("%1%,%2%,%3%,\"%4%\",\"%5%\",\"%6%\",%7%,%8%,"
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"%9%,%10%,%11%,%12%,%13%,%14%,\"%15%\"\n")
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: drizzled::plugin::Logging("Logging_query"),
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fd(-1), re(NULL), pe(NULL),
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formatter("%1%,%2%,%3%,\"%4%\",\"%5%\",\"%6%\",%7%,%8%,"
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"%9%,%10%,%11%,%12%,%13%,%14%,\"%15%\"\n")
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/* if there is no destination filename, dont bother doing anything */
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if (_filename.empty())
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if (sysvar_logging_query_filename == NULL)
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fd= open(_filename.c_str(),
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fd= open(sysvar_logging_query_filename,
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O_WRONLY | O_APPEND | O_CREAT,
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S_IRUSR|S_IWUSR);
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sql_perror( _("fail open()"), _filename);
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char errmsg[STRERROR_MAX];
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strerror_r(errno, errmsg, sizeof(errmsg));
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errmsg_printf(ERRMSG_LVL_ERROR, _("fail open() fn=%s er=%s\n"),
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sysvar_logging_query_filename,
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if (not _query_pcre.empty())
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if (sysvar_logging_query_pcre != NULL)
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const char *this_pcre_error;
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int this_pcre_erroffset;
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re= pcre_compile(_query_pcre.c_str(), 0, &this_pcre_error,
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re= pcre_compile(sysvar_logging_query_pcre, 0, &this_pcre_error,
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&this_pcre_erroffset, NULL);
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pe= pcre_study(re, 0, &this_pcre_error);
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/* TODO emit error messages if there is a problem */
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// return if not enabled or query was too fast or resultset was too small
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if (sysvar_logging_query_enable == false)
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if (session->sent_row_count < sysvar_logging_query_threshold_big_resultset.get())
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if (session->examined_row_count < sysvar_logging_query_threshold_big_examined.get())
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TODO, the session object should have a "utime command completed"
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inside itself, so be more accurate, and so this doesnt have to
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keep calling current_utime, which can be slow.
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uint64_t t_mark= session->getCurrentTimestamp(false);
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if (session->getElapsedTime() < (sysvar_logging_query_threshold_slow.get()))
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Session::QueryString query_string(session->getQueryString());
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if (session->sent_row_count < sysvar_logging_query_threshold_big_resultset)
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if (session->examined_row_count < sysvar_logging_query_threshold_big_examined)
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/* TODO, the session object should have a "utime command completed"
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inside itself, so be more accurate, and so this doesnt have to
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keep calling current_utime, which can be slow */
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uint64_t t_mark= get_microtime();
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if ((t_mark - session->start_utime) < (sysvar_logging_query_threshold_slow))
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int this_pcre_rc;
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this_pcre_rc= pcre_exec(re, pe, query_string->c_str(), query_string->length(), 0, 0, NULL, 0);
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this_pcre_rc= pcre_exec(re, pe, session->query.c_str(), session->query.length(), 0, 0, NULL, 0);
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if (this_pcre_rc < 0)
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// Since quotify() builds the quoted string incrementally, we can
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// avoid some reallocating if we reserve some space up front.
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qs.reserve(query_string->length());
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qs.reserve(session->getQueryLength());
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quotify(*query_string, qs);
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quotify(session->getQueryString(), qs);
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// to avoid trying to printf %s something that is potentially NULL
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util::string::const_shared_ptr schema(session->schema());
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const char *dbs= (schema and not schema->empty()) ? schema->c_str() : "";
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const char *dbs= session->db.empty() ? "" : session->db.c_str();
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formatter % t_mark
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% session->thread_id
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% session->getQueryId()
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% getCommandName(session->command)
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% command_name[session->command].str
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% (t_mark - session->getConnectMicroseconds())
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% session->getElapsedTime()
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% (t_mark - session->start_utime)
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% (t_mark - session->utime_after_lock)
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% session->sent_row_count
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% session->examined_row_count
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static Logging_query *handler= NULL;
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static int logging_query_plugin_init(drizzled::module::Context &context)
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const module::option_map &vm= context.getOptions();
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if (vm.count("filename") > 0)
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context.add(new Logging_query(vm["filename"].as<string>(),
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vm["pcre"].as<string>()));
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context.registerVariable(new sys_var_bool_ptr("enable", &sysvar_logging_query_enable));
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context.registerVariable(new sys_var_const_string_val("filename", vm["filename"].as<string>()));
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context.registerVariable(new sys_var_const_string_val("pcre", vm["pcre"].as<string>()));
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context.registerVariable(new sys_var_constrained_value<uint32_t>("threshold_slow", sysvar_logging_query_threshold_slow));
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context.registerVariable(new sys_var_constrained_value<uint32_t>("threshold_big_resultset", sysvar_logging_query_threshold_big_resultset));
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context.registerVariable(new sys_var_constrained_value<uint32_t>("threshold_big_examined", sysvar_logging_query_threshold_big_examined));
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if (vm.count("threshold-slow"))
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if (sysvar_logging_query_threshold_slow > UINT32_MAX)
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errmsg_printf(ERRMSG_LVL_ERROR, _("Invalid value for threshold-slow"));
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if (vm.count("threshold-big-resultset"))
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if (sysvar_logging_query_threshold_big_resultset > UINT32_MAX)
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errmsg_printf(ERRMSG_LVL_ERROR, _("Invalid value for threshold-big-resultset"));
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if (vm.count("threshold-big-examined"))
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if (sysvar_logging_query_threshold_big_examined > UINT32_MAX)
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errmsg_printf(ERRMSG_LVL_ERROR, _("Invalid value for threshold-big-examined"));
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handler= new Logging_query();
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context.add(handler);
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context("enable",
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po::value<bool>(&sysvar_logging_query_enable)->default_value(false)->zero_tokens(),
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_("Enable logging to CSV file"));
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_("File to log to"));
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po::value<string>()->default_value(""),
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_("PCRE to match the query against"));
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N_("Enable logging to CSV file"));
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context("threshold-slow",
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po::value<uint32_constraint>(&sysvar_logging_query_threshold_slow)->default_value(0),
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_("Threshold for logging slow queries, in microseconds"));
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po::value<unsigned long>(&sysvar_logging_query_threshold_slow)->default_value(0),
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N_("Threshold for logging slow queries, in microseconds"));
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context("threshold-big-resultset",
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po::value<uint32_constraint>(&sysvar_logging_query_threshold_big_resultset)->default_value(0),
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_("Threshold for logging big queries, for rows returned"));
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po::value<unsigned long>(&sysvar_logging_query_threshold_big_resultset)->default_value(0),
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N_("Threshold for logging big queries, for rows returned"));
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context("threshold-big-examined",
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po::value<uint32_constraint>(&sysvar_logging_query_threshold_big_examined)->default_value(0),
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_("Threshold for logging big queries, for rows examined"));
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po::value<unsigned long>(&sysvar_logging_query_threshold_big_examined)->default_value(0),
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N_("Threshold for logging big queries, for rows examined"));
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} /* namespace drizzle_plugin */
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static DRIZZLE_SYSVAR_BOOL(
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sysvar_logging_query_enable,
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N_("Enable logging to CSV file"),
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NULL, /* check func */
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NULL, /* update func */
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false /* default */);
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static DRIZZLE_SYSVAR_STR(
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sysvar_logging_query_filename,
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N_("File to log to"),
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NULL, /* check func */
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NULL, /* update func*/
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static DRIZZLE_SYSVAR_STR(
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sysvar_logging_query_pcre,
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N_("PCRE to match the query against"),
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NULL, /* check func */
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NULL, /* update func*/
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static DRIZZLE_SYSVAR_ULONG(
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sysvar_logging_query_threshold_slow,
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N_("Threshold for logging slow queries, in microseconds"),
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NULL, /* check func */
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NULL, /* update func */
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UINT32_MAX, /* max */
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static DRIZZLE_SYSVAR_ULONG(
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threshold_big_resultset,
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sysvar_logging_query_threshold_big_resultset,
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N_("Threshold for logging big queries, for rows returned"),
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NULL, /* check func */
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NULL, /* update func */
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UINT32_MAX, /* max */
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static DRIZZLE_SYSVAR_ULONG(
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threshold_big_examined,
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sysvar_logging_query_threshold_big_examined,
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N_("Threshold for logging big queries, for rows examined"),
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NULL, /* check func */
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NULL, /* update func */
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UINT32_MAX, /* max */
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static drizzle_sys_var* logging_query_system_variables[]= {
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DRIZZLE_SYSVAR(enable),
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DRIZZLE_SYSVAR(filename),
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DRIZZLE_SYSVAR(pcre),
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DRIZZLE_SYSVAR(threshold_slow),
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DRIZZLE_SYSVAR(threshold_big_resultset),
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DRIZZLE_SYSVAR(threshold_big_examined),
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DRIZZLE_DECLARE_PLUGIN
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"Mark Atwood <mark@fallenpegasus.com>",
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N_("Log queries to a CSV file"),
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PLUGIN_LICENSE_GPL,
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drizzle_plugin::logging_query_plugin_init,
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drizzle_plugin::init_options
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logging_query_plugin_init,
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logging_query_system_variables,
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DRIZZLE_DECLARE_PLUGIN_END;