text: EXEC SQL SET DESCRIPTOR indesc COUNT = 1;
  EXEC SQL SET DESCRIPTOR indesc VALUE 1 DATA = 2;
  EXEC SQL SET DESCRIPTOR indesc VALUE 1 DATA = :val1;
  EXEC SQL SET DESCRIPTOR indesc VALUE 2 INDICATOR = :val1, DATA = 'some string';
  EXEC SQL SET DESCRIPTOR indesc VALUE 2 INDICATOR = :val2null, DATA = :val2;
  