# File lib/sequel/adapters/ado.rb, line 11 def initialize(opts) super case @opts[:conn_string] when /Microsoft\.(Jet|ACE)\.OLEDB/o Sequel.ts_require 'adapters/ado/access' extend Sequel::ADO::Access::DatabaseMethods @dataset_class = ADO::Access::Dataset else @opts[:driver] ||= 'SQL Server' case @opts[:driver] when 'SQL Server' Sequel.ts_require 'adapters/ado/mssql' extend Sequel::ADO::MSSQL::DatabaseMethods @dataset_class = ADO::MSSQL::Dataset set_mssql_unicode_strings end end end
In addition to the usual database options, the following options have an effect:
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.
The driver to use in the ADO connection string. If not provided, a default of “SQL Server” is used.
The full ADO connection string. If this is provided, the usual options are ignored.
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 50 def connect(server) opts = server_opts(server) s = opts[:conn_string] || "driver=#{opts[:driver]};server=#{opts[:host]};database=#{opts[:database]}#{";uid=#{opts[:user]};pwd=#{opts[:password]}" if opts[:user]}" handle = WIN32OLE.new('ADODB.Connection') handle.CommandTimeout = opts[:command_timeout] if opts[:command_timeout] handle.Provider = opts[:provider] if opts[:provider] handle.Open(s) handle end
# File lib/sequel/adapters/ado.rb, line 60 def disconnect_connection(conn) conn.Close end
# File lib/sequel/adapters/ado.rb, line 90 def execute(sql, opts={}) synchronize(opts[:server]) do |conn| begin r = log_yield(sql){conn.Execute(sql)} yield(r) if block_given? rescue ::WIN32OLERuntimeError => e raise_error(e) end end nil end
Just execute so it doesn't attempt to return the number of rows modified.
# File lib/sequel/adapters/ado.rb, line 65 def execute_ddl(sql, opts={}) execute(sql, opts) 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 78 def execute_dui(sql, opts={}) return super if opts[:provider] synchronize(opts[:server]) do |conn| begin log_yield(sql){conn.Execute(sql, 1)} WIN32OLE::ARGV[1] rescue ::WIN32OLERuntimeError => e raise_error(e) end end end
Just execute so it doesn't attempt to return the number of rows modified.
# File lib/sequel/adapters/ado.rb, line 70 def execute_insert(sql, opts={}) execute(sql, opts) end
The ADO adapter's default provider doesn't support transactions, since it creates a new native connection for each query. So Sequel only attempts to use transactions if an explicit :provider is given.
# File lib/sequel/adapters/ado.rb, line 108 def begin_transaction(conn, opts={}) super if @opts[:provider] end
# File lib/sequel/adapters/ado.rb, line 112 def commit_transaction(conn, opts={}) super if @opts[:provider] end
# File lib/sequel/adapters/ado.rb, line 116 def database_error_classes [::WIN32OLERuntimeError] end
# File lib/sequel/adapters/ado.rb, line 120 def disconnect_error?(e, opts) super || (e.is_a?(::WIN32OLERuntimeError) && e.message =~ DISCONNECT_ERROR_RE) end
# File lib/sequel/adapters/ado.rb, line 124 def rollback_transaction(conn, opts={}) super if @opts[:provider] end