# File lib/sequel/adapters/dbi.rb, line 89
 89:       def fetch_rows(sql)
 90:         execute(sql) do |s|
 91:           begin
 92:             columns = cols = s.column_names.map{|c| output_identifier(c)}
 93:             if opts[:offset] && offset_returns_row_number_column?
 94:               rn = row_number_column
 95:               columns = columns.dup
 96:               columns.delete(rn)
 97:             end
 98:             @columns = columns
 99:             s.fetch do |r|
100:               row = {}
101:               cols.each{|c| row[c] = r.shift}
102:               row.delete(rn) if rn
103:               yield row
104:             end
105:           ensure
106:             s.finish rescue nil
107:           end
108:         end
109:         self
110:       end