Function load_db_opt

sql/sql_db.cc:278–356

*/

bool load_db_opt(THD *thd, const char *path, HA_CREATE_INFO *create)
{
  File file;
  char buf[256];
  DBUG_ENTER("load_db_opt");
  bool error=1;
  uint nbytes;

  memset(create, 0, sizeof(*create));
  create->default_table_charset= thd->variables.collation_server;

  /* Check if options for this database are already in the hash */
  if (!get_dbopt(path, create))
    DBUG_RETURN(0);

  /* Otherwise, load options from the .opt file */
  if ((file= mysql_file_open(key_file_dbopt,
                             path, O_RDONLY | O_SHARE, MYF(0))) < 0)
    goto err1;

  IO_CACHE cache;
  if (init_io_cache(&cache, file, IO_SIZE, READ_CACHE, 0, 0, MYF(0)))
    goto err2;

  while ((int) (nbytes= my_b_gets(&cache, (char*) buf, sizeof(buf))) > 0)
  {
    char *pos= buf+nbytes-1;
    /* Remove end space and control characters */
    while (pos > buf && !my_isgraph(&my_charset_latin1, pos[-1]))
      pos--;
    *pos=0;
    if ((pos= strchr(buf, '=')))
    {
      if (!strncmp(buf,"default-character-set", (pos-buf)))
      {
        /*
           Try character set name, and if it fails
           try collation name, probably it's an old
           4.1.0 db.opt file, which didn't have
           separate default-character-set and
           default-collation commands.
        */
        if (!(create->default_table_charset=
        get_charset_by_csname(pos+1, MY_CS_PRIMARY, MYF(0))) &&
            !(create->default_table_charset=
              get_charset_by_name(pos+1, MYF(0))))
        {
          sql_print_error("Error while loading database options: '%s':",path);
          sql_print_error(ER(ER_UNKNOWN_CHARACTER_SET),pos+1);
          create->default_table_charset= default_charset_info;
        }
      }
      else if (!strncmp(buf,"default-collation", (pos-buf)))
      {
        if (!(create->default_table_charset= get_charset_by_name(pos+1,
                                                           MYF(0))))
        {
          sql_print_error("Error while loading database options: '%s':",path);