text: --+ holdcas on;
  set names utf8;
  --test
  select substring_index('Ğülen','le',0);
  --test
  select substring_index('Ğülen','ül',1.2);
  --test
  select substring_index('Ğülen','ül',100);
  --test
  select substring_index('Ğülen','b',-1);
  --test
  select substring_index('Ğülen',null,-1);
  --test
  select substring_index('Ğülen','',2);
  set names iso88591;
  commit;
  --+ holdcas off;
  
  