Repeated last row of query

I am using ruby-dbi to access a MS SQL database. The problem is th开发者_运维知识库at whenever I select more than one row from the DB, the result contains correct number of items, but all of them are the same, when they shouldn't be:

irb(main):001:0> require 'dbi'
=> true
irb(main):010:0> db=DBI.connect('dbi:ODBC:dataSource', 'userName', '****')
=> #<DBI::DatabaseHandle:0xff3df8 @handle=#<DBI::DBD::ODBC::Database:0xff3e88 @h
andle=#<ODBC::Database:0xff3f30>, @attr={}>, @trace_output=nil, @trace_mode=nil,
 @convert_types=true, @driver_name="odbc">
irb(main):009:0> db.select_all('select distinct top 10 id from rawdata')
=> [[308], [308], [308], [308], [308], [308], [308], [308], [308], [308]]

The problem seems to be the as the one discussed here, but the solution proposed there (using alias) didn't work for me (or maybe I misunderstood it).

How can I fix this?

I'm using DBI 0.4.5, and Ruby 1.9.2 on Windows.

That looks kind of strange because select_all are supposed to return DBI::Row objects. Try

rows = db.select_all('select distinct top 10 id from rawdata')
rows.each do |row|
  printf "ID: %d\n", row["id"]
end

I can only recommend: Go for TinyTds

https://github.com/rails-sqlserver/tiny_tds

Its - easier to install and configure - faster - more stable

In the end, after realizing (at least partially) what was the post I linked in the question talking about, I modified the file row.rb from the source code of DBI:

I removed the code

if RUBY_VERSION =~ /^1\.9/
    def __getobj__
        @arr
    end

    def __setobj__(obj)
        @delegate_dc_obj = @arr = obj
    end
else

and the acommpanying end and I also removed the inheritance: < DelegateClass(Array).

I had the same problem on a MS-SQL database with ruby 1.9.2p180 (2011-02-18)

This is how I solved it:

def myDBIexecute(dbhash,query)

  begin
    # open the connection
    conn = DBI.connect('DBI:ODBC:'+dbhash['datasource'].to_s,dbhash['username'].to_s,dbhash['password'].to_s)
    sth = conn.prepare(query)
    sth.execute()

    outputme=[]

    while row = sth.fetch
      mrow={}
        sth.column_names.each{|aname|
        mrow[aname]=row[aname].to_s
        }
     outputme << mrow
    end

    sth.finish

    return outputme

  rescue DBI::DatabaseError => e
     puts "Error code:    #{e.err}"
     puts "Error message: #{e.errstr}"
  ensure
     # disconnect from server
     conn.disconnect if conn
  end
end