Class | Sequel::ADO::Database |
In: |
lib/sequel/adapters/ado.rb
|
Parent: | Sequel::Database |
DISCONNECT_ERROR_RE | = | /Communication link failure/ |
CommandTimeout | = | opts[:command_timeout] if opts[:command_timeout] |
Provider | = | opts[:provider] if opts[:provider] |
In addition to the usual database options, the following options have an effect:
:command_timeout : | Sets the time in seconds to wait while attempting to execute a command before cancelling the attempt and generating an error. Specifically, it sets the ADO CommandTimeout property. If this property is not set, the default of 30 seconds is used. |
:driver : | The driver to use in the ADO connection string. If not provided, a default of "SQL Server" is used. |
:conn_string : | The full ADO connection string. If this is provided, the usual options are ignored. |
:provider : | Sets the Provider of this ADO connection (for example, "SQLOLEDB"). If you don‘t specify a provider, the default one used by WIN32OLE has major problems, such as creating a new native database connection for every query, which breaks things such as temporary tables. |
Pay special attention to the :provider option, as without specifying a provider, many things will be broken. The SQLNCLI10 provider appears to work well if you are connecting to Microsoft SQL Server, but it is not the default as that would break backwards compatability.
# File lib/sequel/adapters/ado.rb, line 31 31: def connect(server) 32: opts = server_opts(server) 33: s = opts[:conn_string] || "driver=#{opts[:driver]};server=#{opts[:host]};database=#{opts[:database]}#{";uid=#{opts[:user]};pwd=#{opts[:password]}" if opts[:user]}" 34: handle = WIN32OLE.new('ADODB.Connection') 35: handle.CommandTimeout = opts[:command_timeout] if opts[:command_timeout] 36: handle.Provider = opts[:provider] if opts[:provider] 37: handle.Open(s) 38: handle 39: end
# File lib/sequel/adapters/ado.rb, line 41 41: def disconnect_connection(conn) 42: conn.Close 43: rescue WIN32OLERuntimeError 44: nil 45: end
# File lib/sequel/adapters/ado.rb, line 73 73: def execute(sql, opts=OPTS) 74: synchronize(opts[:server]) do |conn| 75: begin 76: r = log_yield(sql){conn.Execute(sql)} 77: yield(r) if block_given? 78: rescue ::WIN32OLERuntimeError => e 79: raise_error(e) 80: end 81: end 82: nil 83: end
Use pass by reference in WIN32OLE to get the number of affected rows, unless is a provider is in use (since some providers don‘t seem to return the number of affected rows, but the default provider appears to).
# File lib/sequel/adapters/ado.rb, line 61 61: def execute_dui(sql, opts=OPTS) 62: return super if opts[:provider] 63: synchronize(opts[:server]) do |conn| 64: begin 65: log_yield(sql){conn.Execute(sql, 1)} 66: WIN32OLE::ARGV[1] 67: rescue ::WIN32OLERuntimeError => e 68: raise_error(e) 69: end 70: end 71: end