# File lib/dbd_pg/Pg.rb, line 708 def fetch_scroll(direction, offset) # Exact semantics aren't too closely defined. I attempted to follow the DBI:Mysql example. case direction when SQL_FETCH_NEXT # Nothing special to do, besides the fetchrow when SQL_FETCH_PRIOR @index -= 2 when SQL_FETCH_FIRST @index = -1 when SQL_FETCH_LAST @index = @result.size - 2 when SQL_FETCH_ABSOLUTE # Note: if you go "out of range", all fetches will give nil until you get back # into range, this doesn't raise an error. @index = offset-1 when SQL_FETCH_RELATIVE # Note: if you go "out of range", all fetches will give nil until you get back # into range, this doesn't raise an error. @index += offset - 1 else raise NotSupportedError end self.fetchrow end