diff --git a/sql/log_event.cc b/sql/log_event.cc index 45a3e749e9e..6928d8dd086 100644 --- a/sql/log_event.cc +++ b/sql/log_event.cc @@ -22,11 +22,11 @@ #include "mysql_priv.h" #endif /* MYSQL_CLIENT */ -#define LOG_EVENT_HEADER_LEN 9 +#define LOG_EVENT_HEADER_LEN 13 #define QUERY_HEADER_LEN (sizeof(uint32) + sizeof(uint32) + sizeof(uchar)) #define LOAD_HEADER_LEN (sizeof(uint32) + sizeof(uint32) + \ + sizeof(uint32) + 2 + sizeof(uint32)) -#define EVENT_LEN_OFFSET 5 +#define EVENT_LEN_OFFSET 9 #define EVENT_TYPE_OFFSET 4 #define MAX_EVENT_LEN 4*1024*1024 #define QUERY_EVENT_OVERHEAD LOG_EVENT_HEADER_LEN+QUERY_HEADER_LEN @@ -71,6 +71,8 @@ int Log_event::write_header(FILE* file) int4store(pos, when); // timestamp pos += 4; *pos++ = get_type_code(); // event type code + int4store(pos, server_id); + pos += 4; int4store(pos, get_data_size() + LOG_EVENT_HEADER_LEN); pos += 4; return (my_fwrite(file, (byte*) buf, (uint) (pos - buf), @@ -106,16 +108,19 @@ int Log_event::read_log_event(FILE* file, String* packet) Log_event* Log_event::read_log_event(FILE* file) { time_t timestamp; - char buf[5]; + uint32 server_id; + + char buf[LOG_EVENT_HEADER_LEN-4]; if (my_fread(file, (byte *) buf, sizeof(buf), MY_NABP)) return NULL; timestamp = uint4korr(buf); - + server_id = uint4korr(buf + 5); + switch(buf[EVENT_TYPE_OFFSET]) { case QUERY_EVENT: { - Query_log_event* q = new Query_log_event(file, timestamp); + Query_log_event* q = new Query_log_event(file, timestamp, server_id); if (!q->query) { delete q; @@ -127,7 +132,7 @@ Log_event* Log_event::read_log_event(FILE* file) case LOAD_EVENT: { - Load_log_event* l = new Load_log_event(file, timestamp); + Load_log_event* l = new Load_log_event(file, timestamp, server_id); if (!l->table_name) { delete l; @@ -140,7 +145,7 @@ Log_event* Log_event::read_log_event(FILE* file) case ROTATE_EVENT: { - Rotate_log_event* r = new Rotate_log_event(file, timestamp); + Rotate_log_event* r = new Rotate_log_event(file, timestamp, server_id); if (!r->new_log_ident) { delete r; @@ -152,7 +157,7 @@ Log_event* Log_event::read_log_event(FILE* file) case INTVAR_EVENT: { - Intvar_log_event* e = new Intvar_log_event(file, timestamp); + Intvar_log_event* e = new Intvar_log_event(file, timestamp, server_id); if (e->type == INVALID_INT_EVENT) { delete e; @@ -162,8 +167,8 @@ Log_event* Log_event::read_log_event(FILE* file) return e; } - case START_EVENT: return new Start_log_event(file, timestamp); - case STOP_EVENT: return new Stop_log_event(file, timestamp); + case START_EVENT: return new Start_log_event(file, timestamp, server_id); + case STOP_EVENT: return new Stop_log_event(file, timestamp, server_id); default: return NULL; } @@ -221,12 +226,23 @@ Log_event* Log_event::read_log_event(const char* buf, int max_buf) return NULL; } -void Log_event::print_timestamp(FILE* file) +void Log_event::print_header(FILE* file) +{ + fputc('#', file); + print_timestamp(file); + fprintf(file, " server id %d ", server_id); +} + +void Log_event::print_timestamp(FILE* file, time_t* ts = 0) { struct tm tm_tmp; - localtime_r(&when,&tm_tmp); + if(!ts) + { + ts = &when; + } + localtime_r(ts,&tm_tmp); - fprintf(file,"#%02d%02d%02d %2d:%02d:%02d", + fprintf(file,"%02d%02d%02d %2d:%02d:%02d", tm_tmp.tm_year % 100, tm_tmp.tm_mon+1, tm_tmp.tm_mday, @@ -241,8 +257,11 @@ void Start_log_event::print(FILE* file, bool short_form) if (short_form) return; - print_timestamp(file); - fprintf(file, "\tStart\n"); + print_header(file); + fprintf(file, "\tStart: binlog v %d, server v %s created ", binlog_version, + server_version); + print_timestamp(file, (time_t*)&created); + fputc('\n', file); fflush(file); } @@ -251,7 +270,7 @@ void Stop_log_event::print(FILE* file, bool short_form) if (short_form) return; - print_timestamp(file); + print_header(file); fprintf(file, "\tStop\n"); fflush(file); } @@ -261,7 +280,7 @@ void Rotate_log_event::print(FILE* file, bool short_form) if (short_form) return; - print_timestamp(file); + print_header(file); fprintf(file, "\tRotate to "); if (new_log_ident) my_fwrite(file, (byte*) new_log_ident, (uint)ident_len, @@ -270,8 +289,9 @@ void Rotate_log_event::print(FILE* file, bool short_form) fflush(file); } -Rotate_log_event::Rotate_log_event(FILE* file, time_t when_arg): - Log_event(when_arg),new_log_ident(NULL),alloced(0) +Rotate_log_event::Rotate_log_event(FILE* file, time_t when_arg, + uint32 server_id): + Log_event(when_arg, 0, 0, server_id),new_log_ident(NULL),alloced(0) { char *tmp_ident; char buf[4]; @@ -298,6 +318,14 @@ Rotate_log_event::Rotate_log_event(FILE* file, time_t when_arg): alloced = 1; } +Start_log_event::Start_log_event(const char* buf) :Log_event(buf) +{ + buf += EVENT_LEN_OFFSET + 4; // skip even length + binlog_version = uint2korr(buf); + memcpy(server_version, buf + 2, sizeof(server_version)); + created = uint4korr(buf + 2 + sizeof(server_version)); +} + Rotate_log_event::Rotate_log_event(const char* buf, int max_buf): Log_event(buf),new_log_ident(NULL),alloced(0) { @@ -322,8 +350,9 @@ int Rotate_log_event::write_data(FILE* file) return 0; } -Query_log_event::Query_log_event(FILE* file, time_t when_arg): - Log_event(when_arg),data_buf(0),query(NULL),db(NULL) +Query_log_event::Query_log_event(FILE* file, time_t when_arg, + uint32 server_id): + Log_event(when_arg,0,0,server_id),data_buf(0),query(NULL),db(NULL) { char buf[QUERY_HEADER_LEN + 4]; ulong data_len; @@ -382,7 +411,7 @@ void Query_log_event::print(FILE* file, bool short_form) { if (!short_form) { - print_timestamp(file); + print_header(file); fprintf(file, "\tQuery\tthread_id=%lu\texec_time=%lu\n", (ulong) thread_id, (ulong) exec_time); } @@ -414,8 +443,9 @@ int Query_log_event::write_data(FILE* file) return 0; } -Intvar_log_event:: Intvar_log_event(FILE* file, time_t when_arg) - :Log_event(when_arg), type(INVALID_INT_EVENT) +Intvar_log_event:: Intvar_log_event(FILE* file, time_t when_arg, + uint32 server_id) + :Log_event(when_arg,0,0,server_id), type(INVALID_INT_EVENT) { my_fseek(file, 4L, MY_SEEK_CUR, MYF(MY_WME)); // skip the event length char buf[9]; @@ -444,7 +474,7 @@ void Intvar_log_event::print(FILE* file, bool short_form) char llbuff[22]; if(!short_form) { - print_timestamp(file); + print_header(file); fprintf(file, "\tIntvar\n"); } @@ -493,8 +523,9 @@ int Load_log_event::write_data(FILE* file __attribute__((unused))) return 0; } -Load_log_event::Load_log_event(FILE* file, time_t when): - Log_event(when),data_buf(0),num_fields(0),fields(0),field_lens(0),field_block_len(0), +Load_log_event::Load_log_event(FILE* file, time_t when, uint32 server_id): + Log_event(when,0,0,server_id),data_buf(0),num_fields(0), + fields(0),field_lens(0),field_block_len(0), table_name(0),db(0),fname(0) { @@ -539,7 +570,8 @@ Load_log_event::Load_log_event(FILE* file, time_t when): } Load_log_event::Load_log_event(const char* buf, int max_buf): - Log_event(when),data_buf(0),num_fields(0),fields(0),field_lens(0),field_block_len(0), + Log_event(when,0,0,server_id),data_buf(0),num_fields(0),fields(0), + field_lens(0),field_block_len(0), table_name(0),db(0),fname(0) { @@ -594,7 +626,7 @@ void Load_log_event::print(FILE* file, bool short_form) { if (!short_form) { - print_timestamp(file); + print_header(file); fprintf(file, "\tQuery\tthread_id=%d\texec_time=%ld\n", thread_id, exec_time); } diff --git a/sql/log_event.h b/sql/log_event.h index 82ab462bdf5..8cade92ad27 100644 --- a/sql/log_event.h +++ b/sql/log_event.h @@ -28,7 +28,7 @@ #define LOG_READ_MEM -5 #define LOG_EVENT_OFFSET 4 - +#define BINLOG_VERSION 1 enum Log_event_type { START_EVENT = 1, QUERY_EVENT =2, STOP_EVENT=3, ROTATE_EVENT = 4, INTVAR_EVENT=5, @@ -40,25 +40,32 @@ enum Int_event_type { INVALID_INT_EVENT = 0, LAST_INSERT_ID_EVENT = 1, INSERT_ID class String; #endif +extern uint32 server_id; + class Log_event { public: time_t when; ulong exec_time; - int valid_exec_time; // if false, the exec time setting is bogus and needs + int valid_exec_time; // if false, the exec time setting is bogus + uint32 server_id; int write(FILE* file); int write_header(FILE* file); virtual int write_data(FILE* file __attribute__((unused))) { return 0; } virtual Log_event_type get_type_code() = 0; Log_event(time_t when_arg, ulong exec_time_arg = 0, - int valid_exec_time_arg = 0): when(when_arg), - exec_time(exec_time_arg), valid_exec_time(valid_exec_time_arg) {} + int valid_exec_time_arg = 0, uint32 server_id = 0): when(when_arg), + exec_time(exec_time_arg), valid_exec_time(valid_exec_time_arg) + { + if(!server_id) this->server_id = ::server_id; + else this->server_id = server_id; + } - Log_event(const char* buf): valid_exec_time(1) + Log_event(const char* buf): valid_exec_time(0) { when = uint4korr(buf); - exec_time = uint4korr(buf + 5); + server_id = uint4korr(buf + 5); } virtual ~Log_event() {} @@ -66,7 +73,8 @@ public: virtual int get_data_size() { return 0;} virtual void print(FILE* file, bool short_form = 0) = 0; - void print_timestamp(FILE* file); + void print_timestamp(FILE* file, time_t *ts = 0); + void print_header(FILE* file); static Log_event* read_log_event(FILE* file); static Log_event* read_log_event(const char* buf, int max_buf); @@ -93,7 +101,7 @@ public: #if !defined(MYSQL_CLIENT) THD* thd; Query_log_event(THD* thd_arg, const char* query_arg): - Log_event(thd_arg->start_time), data_buf(0), + Log_event(thd_arg->start_time,0,0,thd->server_id), data_buf(0), query(query_arg), db(thd_arg->db), q_len(thd_arg->query_length), thread_id(thd_arg->thread_id), thd(thd_arg) { @@ -105,7 +113,7 @@ public: } #endif - Query_log_event(FILE* file, time_t when); + Query_log_event(FILE* file, time_t when, uint32 server_id); Query_log_event(const char* buf, int max_buf); ~Query_log_event() { @@ -244,7 +252,7 @@ public: void set_fields(List &fields); #endif - Load_log_event(FILE* file, time_t when); + Load_log_event(FILE* file, time_t when, uint32 server_id); Load_log_event(const char* buf, int max_buf); ~Load_log_event() { @@ -269,21 +277,52 @@ public: void print(FILE* file, bool short_form = 0); }; +extern char server_version[50]; class Start_log_event: public Log_event { public: - Start_log_event() :Log_event(time(NULL)) - {} - Start_log_event(FILE* file, time_t when_arg) :Log_event(when_arg) + uint16 binlog_version; + char server_version[50]; + uint32 created; + + Start_log_event() :Log_event(time(NULL)),binlog_version(BINLOG_VERSION) { + created = when; + memcpy(server_version, ::server_version, sizeof(server_version)); + } + Start_log_event(FILE* file, time_t when_arg, uint32 server_id) : + Log_event(when_arg, 0, 0, server_id) + { + char buf[sizeof(server_version) + sizeof(binlog_version) + + sizeof(created)]; my_fseek(file, 4L, MY_SEEK_CUR, MYF(MY_WME)); // skip the event length + if (my_fread(file, (byte*) buf, sizeof(buf), MYF(MY_NABP | MY_WME))) + return; + binlog_version = uint2korr(buf); + memcpy(server_version, buf + 2, sizeof(server_version)); + created = uint4korr(buf + 2 + sizeof(server_version)); } - Start_log_event(const char* buf) :Log_event(buf) - { - } + Start_log_event(const char* buf); + ~Start_log_event() {} Log_event_type get_type_code() { return START_EVENT;} + int write_data(FILE* file) + { + if(my_fwrite(file, (byte*) &binlog_version, sizeof(binlog_version), + MYF(MY_NABP | MY_WME)) || + my_fwrite(file, (byte*) server_version, sizeof(server_version), + MYF(MY_NABP | MY_WME)) || + my_fwrite(file, (byte*) &created, sizeof(created), + MYF(MY_NABP | MY_WME))) + return -1; + return 0; + } + int get_data_size() + { + return sizeof(binlog_version) + sizeof(server_version) + + sizeof(created); + } void print(FILE* file, bool short_form = 0); }; @@ -295,7 +334,7 @@ public: Intvar_log_event(uchar type_arg, ulonglong val_arg) :Log_event(time(NULL)),val(val_arg),type(type_arg) {} - Intvar_log_event(FILE* file, time_t when); + Intvar_log_event(FILE* file, time_t when, uint32 server_id); Intvar_log_event(const char* buf); ~Intvar_log_event() {} Log_event_type get_type_code() { return INTVAR_EVENT;} @@ -311,7 +350,8 @@ class Stop_log_event: public Log_event public: Stop_log_event() :Log_event(time(NULL)) {} - Stop_log_event(FILE* file, time_t when_arg): Log_event(when_arg) + Stop_log_event(FILE* file, time_t when_arg, uint32 server_id): + Log_event(when_arg,0,0,server_id) { my_fseek(file, 4L, MY_SEEK_CUR, MYF(MY_WME)); // skip the event length } @@ -337,7 +377,7 @@ public: alloced(0) {} - Rotate_log_event(FILE* file, time_t when) ; + Rotate_log_event(FILE* file, time_t when, uint32 server_id) ; Rotate_log_event(const char* buf, int max_buf); ~Rotate_log_event() { diff --git a/sql/mysql_priv.h b/sql/mysql_priv.h index dd87f40efe9..0fd7979e047 100644 --- a/sql/mysql_priv.h +++ b/sql/mysql_priv.h @@ -437,6 +437,7 @@ void sql_perror(const char *message); void sql_print_error(const char *format,...) __attribute__ ((format (printf, 1, 2))); +extern uint32 server_id; extern char mysql_data_home[2],server_version[50],max_sort_char, mysql_real_data_home[]; extern my_string mysql_unix_port,mysql_tmpdir; diff --git a/sql/mysqlbinlog.cc b/sql/mysqlbinlog.cc index dd34230bc1a..c7b31946349 100644 --- a/sql/mysqlbinlog.cc +++ b/sql/mysqlbinlog.cc @@ -29,6 +29,8 @@ #define CLIENT_CAPABILITIES (CLIENT_LONG_PASSWORD | CLIENT_LONG_FLAG | CLIENT_LOCAL_FILES) +char server_version[50]; +uint32 server_id = 0; // needed by net_serv.c ulong bytes_sent = 0L, bytes_received = 0L; diff --git a/sql/mysqld.cc b/sql/mysqld.cc index aa3aa0b0bf4..2479ae8fb1f 100644 --- a/sql/mysqld.cc +++ b/sql/mysqld.cc @@ -142,6 +142,7 @@ static uint handler_count; static bool opt_console=0; #endif +static bool opt_skip_slave_start = 0; // if set, slave is not autostarted static ulong opt_specialflag=SPECIAL_ENGLISH; static my_socket unix_sock= INVALID_SOCKET,ip_sock= INVALID_SOCKET; static ulong back_log,connect_timeout,concurrency; @@ -180,6 +181,7 @@ I_List replicate_do_db, replicate_ignore_db; // allow the user to tell us which db to replicate and which to ignore I_List binlog_do_db, binlog_ignore_db; +uint32 server_id = 0; // server id for replication uint mysql_port; uint test_flags, select_errors=0, dropping_tables=0,ha_open_options=0; uint volatile thread_count=0, thread_running=0, kill_cached_threads=0, @@ -1482,17 +1484,23 @@ int main(int argc, char **argv) LOG_NEW); if (opt_bin_log) { - if (!opt_bin_logname) - { - char tmp[FN_REFLEN]; - strnmov(tmp,hostname,FN_REFLEN-5); - strmov(strcend(tmp,'.'),"-bin"); - opt_bin_logname=my_strdup(tmp,MYF(MY_WME)); - } - mysql_bin_log.set_index_file_name(opt_binlog_index_name); - open_log(&mysql_bin_log, hostname, opt_bin_logname, "-bin", - LOG_BIN); + if(server_id) + { + if (!opt_bin_logname) + { + char tmp[FN_REFLEN]; + strnmov(tmp,hostname,FN_REFLEN-5); + strmov(strcend(tmp,'.'),"-bin"); + opt_bin_logname=my_strdup(tmp,MYF(MY_WME)); + } + mysql_bin_log.set_index_file_name(opt_binlog_index_name); + open_log(&mysql_bin_log, hostname, opt_bin_logname, "-bin", + LOG_BIN); + } + else + sql_print_error("Server id is not set - binary logging disabled"); } + if (opt_slow_log) open_log(&mysql_slow_log, hostname, opt_slow_logname, "-slow.log", LOG_NORMAL); @@ -1596,10 +1604,15 @@ int main(int argc, char **argv) // slave thread if(master_host) { - pthread_t hThread; - if(pthread_create(&hThread, &connection_attrib, handle_slave, 0)) - sql_print_error("Warning: Can't create thread to handle slave"); - + if(server_id) + { + pthread_t hThread; + if(!opt_skip_slave_start && + pthread_create(&hThread, &connection_attrib, handle_slave, 0)) + sql_print_error("Warning: Can't create thread to handle slave"); + } + else + sql_print_error("Server id is not set, slave thread will not be started"); } printf(ER(ER_READY),my_progname,server_version,""); @@ -2201,7 +2214,8 @@ enum options { OPT_REPLICATE_DO_DB, OPT_REPLICATE_IGNORE_DB, OPT_LOG_SLAVE_UPDATES, OPT_BINLOG_DO_DB, OPT_BINLOG_IGNORE_DB, OPT_WANT_CORE, - OPT_SKIP_CONCURRENT_INSERT, OPT_MEMLOCK, OPT_MYISAM_RECOVER + OPT_SKIP_CONCURRENT_INSERT, OPT_MEMLOCK, OPT_MYISAM_RECOVER, + OPT_REPLICATE_REWRITE_DB, OPT_SERVER_ID, OPT_SKIP_SLAVE_START }; static struct option long_options[] = { @@ -2266,8 +2280,11 @@ static struct option long_options[] = { {"port", required_argument, 0, 'P'}, {"replicate-do-db", required_argument, 0, (int) OPT_REPLICATE_DO_DB}, {"replicate-ignore-db", required_argument, 0, (int) OPT_REPLICATE_IGNORE_DB}, + {"replicate-rewrite-db", required_argument, 0, + (int) OPT_REPLICATE_REWRITE_DB}, {"safe-mode", no_argument, 0, (int) OPT_SAFE}, {"socket", required_argument, 0, (int) OPT_SOCKET}, + {"server-id", required_argument, 0, (int)OPT_SERVER_ID}, {"set-variable", required_argument, 0, 'O'}, #ifdef HAVE_BERKELEY_DB {"skip-bdb", no_argument, 0, (int) OPT_BDB_SKIP}, @@ -2280,6 +2297,7 @@ static struct option long_options[] = { {"skip-name-resolve", no_argument, 0, (int) OPT_SKIP_RESOLVE}, {"skip-new", no_argument, 0, (int) OPT_SKIP_NEW}, {"skip-show-database", no_argument, 0, (int) OPT_SKIP_SHOW_DB}, + {"skip-slave-start", no_argument, 0, (int) OPT_SKIP_SLAVE_START}, {"skip-networking", no_argument, 0, (int) OPT_SKIP_NETWORKING}, {"skip-thread-priority", no_argument, 0, (int) OPT_SKIP_PRIOR}, {"sql-bin-update-same", no_argument, 0, (int) OPT_SQL_BIN_UPDATE_SAME}, @@ -2428,6 +2446,7 @@ struct show_var_st init_vars[]= { {"port", (char*) &mysql_port, SHOW_INT}, {"protocol_version", (char*) &protocol_version, SHOW_INT}, {"record_buffer", (char*) &my_default_record_cache_size,SHOW_LONG}, + {"server_id", (char*) &server_id, SHOW_LONG}, {"skip_locking", (char*) &my_disable_locking, SHOW_MY_BOOL}, {"skip_networking", (char*) &opt_disable_networking, SHOW_BOOL}, {"skip_show_database", (char*) &opt_skip_show_db, SHOW_BOOL}, @@ -2851,6 +2870,9 @@ static void get_options(int argc,char **argv) opt_slow_log=1; opt_slow_logname=optarg; break; + case (int)OPT_SKIP_SLAVE_START: + opt_skip_slave_start = 1; + break; case (int) OPT_SKIP_NEW: opt_specialflag|= SPECIAL_NO_NEW_FUNC; default_table_type=DB_TYPE_ISAM; @@ -2972,6 +2994,9 @@ static void get_options(int argc,char **argv) default_table_type= (enum db_type) type; break; } + case OPT_SERVER_ID: + server_id = atoi(optarg); + break; case OPT_DELAY_KEY_WRITE: ha_open_options|=HA_OPEN_DELAY_KEY_WRITE; myisam_delay_key_write=1; diff --git a/sql/share/romanian/errmsg.sys b/sql/share/romanian/errmsg.sys index 20870bb1fa3..a40c10f7062 100644 Binary files a/sql/share/romanian/errmsg.sys and b/sql/share/romanian/errmsg.sys differ diff --git a/sql/slave.cc b/sql/slave.cc index 7fcfb803ac1..37b7ccf8b22 100644 --- a/sql/slave.cc +++ b/sql/slave.cc @@ -797,11 +797,17 @@ pthread_handler_decl(handle_slave,arg __attribute__((unused))) THD *thd;; // needs to be first for thread_stack MYSQL *mysql = NULL ; + if(!server_id) + { + sql_print_error("Server id not set, will not start slave"); + pthread_exit(1); + } + pthread_mutex_lock(&LOCK_slave); if(slave_running) { pthread_mutex_unlock(&LOCK_slave); - return 0; // safety just in case + pthread_exit(1); // safety just in case } slave_running = 1; abort_slave = 0; @@ -938,7 +944,7 @@ static void safe_reconnect(THD* thd, MYSQL* mysql, MASTER_INFO* mi) while(!slave_killed(thd) && mc_mysql_reconnect(mysql)) { sql_print_error( - "Slave thread: error connecting to slave:%s, retry in %d sec", + "Slave thread: error connecting to master:%s, retry in %d sec", mc_mysql_error(mysql), mi->connect_retry); safe_sleep(thd, mi->connect_retry); } diff --git a/sql/sql_class.cc b/sql/sql_class.cc index 059b17c6d84..8ef4ec3aab4 100644 --- a/sql/sql_class.cc +++ b/sql/sql_class.cc @@ -83,6 +83,7 @@ THD::THD() user_time=bootstrap=in_lock_tables=global_read_lock=0; query_length=col_access=0; query_error=0; + server_id = ::server_id; server_status=SERVER_STATUS_AUTOCOMMIT; next_insert_id=last_insert_id=0; open_tables=temporary_tables=0; diff --git a/sql/sql_class.h b/sql/sql_class.h index 9e4293c7b62..212a641f335 100644 --- a/sql/sql_class.h +++ b/sql/sql_class.h @@ -243,6 +243,7 @@ public: ULL *ull; struct st_my_thread_var *mysys_var; enum enum_server_command command; + uint32 server_id; const char *where; char* last_nx_table; // last non-existent table, we need this for replication char* last_nx_db; // database of the last nx table