# File lib/sequel/adapters/informix.rb, line 39
39:       def fetch_rows(sql)
40:         execute(sql) do |cursor|
41:           begin
42:             col_map = nil
43:             cursor.open.each_hash do |h|
44:               unless col_map
45:                 col_map = {}
46:                 @columns = h.keys.map{|k| col_map[k] = output_identifier(k)}
47:               end
48:               h2 = {}
49:               h.each{|k,v| h2[col_map[k]||k] = v}
50:               yield h2
51:             end
52:           ensure
53:             cursor.respond_to?(:free) ? cursor.free : cursor.drop
54:           end
55:         end
56:         self
57:       end