text: set names ISO88591 collate iso88591_en_ci;
  set @v1='iso8859-1';
  set @v1='iso8859-1' collate iso88591_bin;
  set @v1='iso8859-1' collate utf8_bin;
  set @v1='iso8859-1' collate euckr_bin;
  set @v1='iso8859-1';
  select @v1;
  show collation where charset in (charset(@v1)); 
  show collation where charset in (@v1); 
  show collation where charset=@v1; 
  drop variable @v1;
  set names iso88591 collate iso88591_bin;
  