Libmysqld improvements

libmysqld/lib_sql.cc: select::send rewritten mysql_server_init trimmed sql/convert.cc: Necessary additions to CONVERT sql/item.cc: embedded_send functions added sql/item.h: embedded_send functions added sql/mysqld.cc: main() trimmed sql/sql_class.h: CONVERT::convert_back added
2025-07-30 16:24:05 +03:00 · 2002-11-06 14:42:44 +04:00
parent cda34818c1
commit 311e99d79d
6 changed files with 625 additions and 77 deletions
--- a/libmysqld/lib_sql.cc
+++ b/libmysqld/lib_sql.cc
@ -310,6 +310,133 @@ extern "C"
 ulong		max_allowed_packet, net_buffer_length;


+int STDCALL mysql_server_init(int argc, char **argv, char **groups)
+{
+  char glob_hostname[FN_REFLEN];
+
+  /* This mess is to allow people to call the init function without
+   * having to mess with a fake argv */
+  int *argcp;
+  char ***argvp;
+  int fake_argc = 1;
+  char *fake_argv[] = { (char *)"", 0 };
+  const char *fake_groups[] = { "server", "embedded", 0 };
+  if (argc)
+  {
+    argcp = &argc;
+    argvp = (char***) &argv;
+  }
+  else
+  {
+    argcp = &fake_argc;
+    argvp = (char ***) &fake_argv;
+  }
+  if (!groups)
+      groups = (char**) fake_groups;
+
+
+  /* Only call MY_INIT() if it hasn't been called before */
+  if (!inited)
+  {
+    inited=1;
+    org_my_init_done=my_init_done;
+  }
+  if (!org_my_init_done)
+  {
+    MY_INIT((char *)"mysql_embedded");	// init my_sys library & pthreads
+  }
+
+  if (init_common_variables("my", argc, argv, (const char **)groups))
+  {
+    mysql_server_end();
+    return 1;
+  }
+    
+  /* Get default temporary directory */
+  opt_mysql_tmpdir=getenv("TMPDIR");	/* Use this if possible */
+#if defined( __WIN__) || defined(OS2)
+  if (!opt_mysql_tmpdir)
+    opt_mysql_tmpdir=getenv("TEMP");
+  if (!opt_mysql_tmpdir)
+    opt_mysql_tmpdir=getenv("TMP");
+#endif
+  if (!opt_mysql_tmpdir || !opt_mysql_tmpdir[0])
+    opt_mysql_tmpdir=(char*) P_tmpdir;		/* purecov: inspected */
+
+  if (init_thread_environement())
+  {
+    mysql_server_end();
+    return 1;
+  }
+
+  umask(((~my_umask) & 0666));
+  if (init_server_components())
+  {
+    mysql_server_end();
+    return 1;
+  }
+
+  error_handler_hook = my_message_sql;
+
+  opt_noacl = 1;				// No permissions
+  if (acl_init(opt_noacl))
+  {
+    mysql_server_end();
+    return 1;
+  }
+  if (!opt_noacl)
+    (void) grant_init();
+  init_max_user_conn();
+  init_update_queries();
+
+#ifdef HAVE_DLOPEN
+  if (!opt_noacl)
+    udf_init();
+#endif
+
+  if (opt_bin_log)
+  {
+    if (!opt_bin_logname)
+    {
+      char tmp[FN_REFLEN];
+      /* TODO: The following should be using fn_format();  We just need to
+	 first change fn_format() to cut the file name if it's too long.
+      */
+      strmake(tmp,glob_hostname,FN_REFLEN-5);
+      strmov(strcend(tmp,'.'),"-bin");
+      opt_bin_logname=my_strdup(tmp,MYF(MY_WME));
+    }
+    open_log(&mysql_bin_log, glob_hostname, opt_bin_logname, "-bin",
+	     opt_binlog_index_name, LOG_BIN);
+    using_update_log=1;
+  }
+
+  (void) thr_setconcurrency(concurrency);	// 10 by default
+
+  if (
+#ifdef HAVE_BERKELEY_DB
+      !berkeley_skip ||
+#endif
+      (flush_time && flush_time != ~(ulong) 0L))
+  {
+    pthread_t hThread;
+    if (pthread_create(&hThread,&connection_attrib,handle_manager,0))
+      sql_print_error("Warning: Can't create thread to manage maintenance");
+  }
+
+  /*
+    Update mysqld variables from client variables if set
+    The client variables are set also by get_one_option() in mysqld.cc
+  */
+  if (max_allowed_packet)
+    global_system_variables.max_allowed_packet= max_allowed_packet;
+  if (net_buffer_length)
+    global_system_variables.net_buffer_length= net_buffer_length;
+  return 0;
+}
+
+
+#ifdef __DUMMY
 int STDCALL mysql_server_init(int argc, char **argv, char **groups)
 {
  char glob_hostname[FN_REFLEN];
@ -592,6 +719,289 @@ int STDCALL mysql_server_init(int argc, char **argv, char **groups)
  return 0;
 }

+int STDCALL mysql_server_init(int argc, char **argv, char **groups)
+{
+  char glob_hostname[FN_REFLEN];
+
+  /* This mess is to allow people to call the init function without
+   * having to mess with a fake argv */
+  int *argcp;
+  char ***argvp;
+  int fake_argc = 1;
+  char *fake_argv[] = { (char *)"", 0 };
+  const char *fake_groups[] = { "server", "embedded", 0 };
+  if (argc)
+  {
+    argcp = &argc;
+    argvp = (char***) &argv;
+  }
+  else
+  {
+    argcp = &fake_argc;
+    argvp = (char ***) &fake_argv;
+  }
+  if (!groups)
+      groups = (char**) fake_groups;
+
+  my_umask=0660;		// Default umask for new files
+  my_umask_dir=0700;		// Default umask for new directories
+
+  /* Only call MY_INIT() if it hasn't been called before */
+  if (!inited)
+  {
+    inited=1;
+    org_my_init_done=my_init_done;
+  }
+  if (!org_my_init_done)
+  {
+    MY_INIT((char *)"mysql_embedded");	// init my_sys library & pthreads
+  }
+
+  tzset();			// Set tzname
+
+  start_time=time((time_t*) 0);
+#ifdef HAVE_TZNAME
+#if defined(HAVE_LOCALTIME_R) && defined(_REENTRANT)
+  {
+    struct tm tm_tmp;
+    localtime_r(&start_time,&tm_tmp);
+    strmov(time_zone,tzname[tm_tmp.tm_isdst != 0 ? 1 : 0]);
+  }
+#else
+  {
+    struct tm *start_tm;
+    start_tm=localtime(&start_time);
+    strmov(time_zone,tzname[start_tm->tm_isdst != 0 ? 1 : 0]);
+  }
+#endif
+#endif
+
+  if (gethostname(glob_hostname,sizeof(glob_hostname)-4) < 0)
+    strmov(glob_hostname,"mysql");
+#ifndef DBUG_OFF
+  strxmov(strend(server_version),MYSQL_SERVER_SUFFIX,"-debug",NullS);
+#else
+  strmov(strend(server_version),MYSQL_SERVER_SUFFIX);
+#endif
+  load_defaults("my", (const char **) groups, argcp, argvp);
+  defaults_argv=*argvp;
+
+  /* Get default temporary directory */
+  opt_mysql_tmpdir=getenv("TMPDIR");	/* Use this if possible */
+#if defined( __WIN__) || defined(OS2)
+  if (!opt_mysql_tmpdir)
+    opt_mysql_tmpdir=getenv("TEMP");
+  if (!opt_mysql_tmpdir)
+    opt_mysql_tmpdir=getenv("TMP");
+#endif
+  if (!opt_mysql_tmpdir || !opt_mysql_tmpdir[0])
+    opt_mysql_tmpdir=(char*) P_tmpdir;		/* purecov: inspected */
+
+  set_options();
+  get_options(*argcp, *argvp);
+
+  if (opt_log || opt_update_log || opt_slow_log || opt_bin_log)
+    strcat(server_version,"-log");
+  DBUG_PRINT("info",("%s  Ver %s for %s on %s\n",my_progname,
+		     server_version, SYSTEM_TYPE,MACHINE_TYPE));
+
+  /* These must be set early */
+
+  (void) pthread_mutex_init(&LOCK_mysql_create_db,MY_MUTEX_INIT_SLOW);
+  (void) pthread_mutex_init(&LOCK_Acl,MY_MUTEX_INIT_SLOW);
+  (void) pthread_mutex_init(&LOCK_open,MY_MUTEX_INIT_FAST);
+  (void) pthread_mutex_init(&LOCK_thread_count,MY_MUTEX_INIT_FAST);
+  (void) pthread_mutex_init(&LOCK_mapped_file,MY_MUTEX_INIT_SLOW);
+  (void) pthread_mutex_init(&LOCK_status,MY_MUTEX_INIT_FAST);
+  (void) pthread_mutex_init(&LOCK_error_log,MY_MUTEX_INIT_FAST);
+  (void) pthread_mutex_init(&LOCK_delayed_insert,MY_MUTEX_INIT_FAST);
+  (void) pthread_mutex_init(&LOCK_delayed_status,MY_MUTEX_INIT_FAST);
+  (void) pthread_mutex_init(&LOCK_delayed_create,MY_MUTEX_INIT_SLOW);
+  (void) pthread_mutex_init(&LOCK_manager,MY_MUTEX_INIT_FAST);
+  (void) pthread_mutex_init(&LOCK_crypt,MY_MUTEX_INIT_FAST);
+  (void) pthread_mutex_init(&LOCK_bytes_sent,MY_MUTEX_INIT_FAST);
+  (void) pthread_mutex_init(&LOCK_bytes_received,MY_MUTEX_INIT_FAST);
+  (void) pthread_mutex_init(&LOCK_timezone,MY_MUTEX_INIT_FAST);
+  (void) pthread_mutex_init(&LOCK_user_conn, MY_MUTEX_INIT_FAST);
+  (void) pthread_mutex_init(&LOCK_rpl_status, MY_MUTEX_INIT_FAST);
+  (void) pthread_mutex_init(&LOCK_active_mi, MY_MUTEX_INIT_FAST);
+  (void) pthread_mutex_init(&LOCK_global_system_variables, MY_MUTEX_INIT_FAST);
+  (void) my_rwlock_init(&LOCK_grant, NULL);
+  (void) pthread_cond_init(&COND_thread_count,NULL);
+  (void) pthread_cond_init(&COND_refresh,NULL);
+  (void) pthread_cond_init(&COND_thread_cache,NULL);
+  (void) pthread_cond_init(&COND_flush_thread_cache,NULL);
+  (void) pthread_cond_init(&COND_manager,NULL);
+  (void) pthread_cond_init(&COND_rpl_status, NULL);
+
+  if (set_default_charset_by_name(sys_charset.value, MYF(MY_WME)))
+  {
+    mysql_server_end();
+    return 1;
+  }
+  charsets_list = list_charsets(MYF(MY_CS_COMPILED|MY_CS_CONFIG));
+
+  /* Parameter for threads created for connections */
+  (void) pthread_attr_init(&connection_attrib);
+  (void) pthread_attr_setdetachstate(&connection_attrib,
+				     PTHREAD_CREATE_DETACHED);
+  pthread_attr_setstacksize(&connection_attrib,thread_stack);
+  pthread_attr_setscope(&connection_attrib, PTHREAD_SCOPE_SYSTEM);
+
+#if defined( SET_RLIMIT_NOFILE) || defined( OS2) 
+  /* connections and databases needs lots of files */
+  {
+    uint wanted_files=10+(uint) max(max_connections*5,
+				    max_connections+table_cache_size*2);
+    set_if_bigger(wanted_files, open_files_limit);
+    // Note that some system returns 0 if we succeed here:
+    uint files=set_maximum_open_files(wanted_files);
+    if (files && files < wanted_files && ! open_files_limit)
+    {
+      max_connections=	(ulong) min((files-10),max_connections);
+      table_cache_size= (ulong) max((files-10-max_connections)/2,64);
+      DBUG_PRINT("warning",
+		 ("Changed limits: max_connections: %ld  table_cache: %ld",
+		  max_connections,table_cache_size));
+      sql_print_error("Warning: Changed limits: max_connections: %ld  table_cache: %ld",max_connections,table_cache_size);
+    }
+  }
+#endif
+  unireg_init(opt_specialflag); /* Set up extern variabels */
+  init_errmessage();		/* Read error messages from file */
+  lex_init();
+  item_init();
+  set_var_init();
+  mysys_uses_curses=0;
+#ifdef USE_REGEX
+  regex_init();
+#endif
+  if (use_temp_pool && bitmap_init(&temp_pool,1024,1))
+  {
+    mysql_server_end();
+    return 1;
+  }
+
+  /*
+    We have enough space for fiddling with the argv, continue
+  */
+  umask(((~my_umask) & 0666));
+  table_cache_init();
+  hostname_cache_init();
+  query_cache_result_size_limit(query_cache_limit);
+  query_cache_resize(query_cache_size);
+  randominit(&sql_rand,(ulong) start_time,(ulong) start_time/2);
+  reset_floating_point_exceptions();
+  init_thr_lock();
+  init_slave_list();
+
+  /* Setup log files */
+  if (opt_log)
+    open_log(&mysql_log, glob_hostname, opt_logname, ".log", NullS,
+	     LOG_NORMAL);
+  if (opt_update_log)
+  {
+    open_log(&mysql_update_log, glob_hostname, opt_update_logname, "",
+	     NullS, LOG_NEW);
+    using_update_log=1;
+  }
+
+  if (opt_slow_log)
+    open_log(&mysql_slow_log, glob_hostname, opt_slow_logname, "-slow.log",
+	     NullS, LOG_NORMAL);
+  if (ha_init())
+  {
+    sql_print_error("Can't init databases");
+    exit(1);
+  }
+  ha_key_cache();
+#if defined(HAVE_MLOCKALL) && defined(MCL_CURRENT)
+  if (locked_in_memory && !geteuid())
+  {
+    if (mlockall(MCL_CURRENT))
+    {
+      sql_print_error("Warning: Failed to lock memory. Errno: %d\n",errno);
+    }
+    else
+      locked_in_memory=1;
+  }
+#else
+  locked_in_memory=0;
+#endif    
+
+  if (opt_myisam_log)
+    (void) mi_log( 1 );
+  ft_init_stopwords(ft_precompiled_stopwords);
+
+  /*
+    init signals & alarm
+    After this we can't quit by a simple unireg_abort
+  */
+  error_handler_hook = my_message_sql;
+  if (pthread_key_create(&THR_THD,NULL) ||
+      pthread_key_create(&THR_MALLOC,NULL))
+  {
+    sql_print_error("Can't create thread-keys");
+    exit(1);
+  }
+  opt_noacl = 1;				// No permissions
+  if (acl_init(opt_noacl))
+  {
+    mysql_server_end();
+    return 1;
+  }
+  if (!opt_noacl)
+    (void) grant_init();
+  init_max_user_conn();
+  init_update_queries();
+
+#ifdef HAVE_DLOPEN
+  if (!opt_noacl)
+    udf_init();
+#endif
+
+  if (opt_bin_log)
+  {
+    if (!opt_bin_logname)
+    {
+      char tmp[FN_REFLEN];
+      /* TODO: The following should be using fn_format();  We just need to
+	 first change fn_format() to cut the file name if it's too long.
+      */
+      strmake(tmp,glob_hostname,FN_REFLEN-5);
+      strmov(strcend(tmp,'.'),"-bin");
+      opt_bin_logname=my_strdup(tmp,MYF(MY_WME));
+    }
+    open_log(&mysql_bin_log, glob_hostname, opt_bin_logname, "-bin",
+	     opt_binlog_index_name, LOG_BIN);
+    using_update_log=1;
+  }
+
+  (void) thr_setconcurrency(concurrency);	// 10 by default
+
+  if (
+#ifdef HAVE_BERKELEY_DB
+      !berkeley_skip ||
+#endif
+      (flush_time && flush_time != ~(ulong) 0L))
+  {
+    pthread_t hThread;
+    if (pthread_create(&hThread,&connection_attrib,handle_manager,0))
+      sql_print_error("Warning: Can't create thread to manage maintenance");
+  }
+
+  /*
+    Update mysqld variables from client variables if set
+    The client variables are set also by get_one_option() in mysqld.cc
+  */
+  if (max_allowed_packet)
+    global_system_variables.max_allowed_packet= max_allowed_packet;
+  if (net_buffer_length)
+    global_system_variables.net_buffer_length= net_buffer_length;
+  return 0;
+}
+#endif
+
 void STDCALL mysql_server_end()
 {
  clean_up(0);
@ -830,8 +1240,8 @@ net_field_length(uchar **packet)
  return (ulong) uint4korr(pos+1);
 }

-
-bool select_send::send_data(List<Item> &items)
+#ifdef __DUMMY
+bool select_send___send_data(List<Item> &items)
 {
  List_iterator_fast<Item> li(items);
  Item                     *item;
@ -905,6 +1315,56 @@ bool select_send::send_data(List<Item> &items)

  DBUG_RETURN(0);
 }
+#endif
+
+bool select_send::send_data(List<Item> &items)
+{
+  List_iterator_fast<Item> li(items);
+  Item                     *item;
+  MYSQL_ROWS               *cur;
+  int                      n_fields= items.elements;
+  ulong                    len;
+  CONVERT                  *convert= thd->variables.convert_set;
+  CHARSET_INFO             *charset_info= thd->packet.charset();
+  MYSQL_DATA               *result= thd->mysql->result->data;
+  MEM_ROOT                 *alloc= &result->alloc;
+  MYSQL_ROW                cur_field;
+  MYSQL_FIELD              *mysql_fields= thd->mysql->result->fields;
+
+  DBUG_ENTER("send_data");
+
+  if (unit->offset_limit_cnt)
+  {						// using limit offset,count
+    unit->offset_limit_cnt--;
+    DBUG_RETURN(0);
+  }
+
+  result->rows++;
+  if (!(cur= (MYSQL_ROWS *)alloc_root(alloc, sizeof(MYSQL_ROWS)+(n_fields + 1) * sizeof(char *))))
+  {
+    my_error(ER_OUT_OF_RESOURCES,MYF(0));
+    DBUG_RETURN(1);
+  }
+  cur->data= (MYSQL_ROW)(((char *)cur) + sizeof(MYSQL_ROWS));
+
+  *result->prev_ptr= cur;
+  result->prev_ptr= &cur->next;
+  cur_field=cur->data;
+  for (item=li++; item; item=li++, cur_field++, mysql_fields++)
+  {
+    if (item->embedded_send(convert, charset_info, alloc, cur_field, &len))
+    {
+      my_error(ER_OUT_OF_RESOURCES,MYF(0));
+      DBUG_RETURN(1);
+    }
+    if (mysql_fields->max_length < len)
+      mysql_fields->max_length=len;
+  }
+
+  *cur_field= 0;
+
+  DBUG_RETURN(0);
+}

 bool do_command(THD *thd)
 {