class Sequel::ADO::Database

CONVERSION_PROCS.freeze # SEQUEL5

Constants

CommandTimeout
DISCONNECT_ERROR_RE
Provider

Attributes

conversion_procs[R]

Public Instance Methods

connect(server) click to toggle source

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 116
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
disconnect_connection(conn) click to toggle source
# File lib/sequel/adapters/ado.rb, line 126
def disconnect_connection(conn)
  conn.Close
rescue WIN32OLERuntimeError
  nil
end
execute(sql, opts=OPTS) { |r| ... } click to toggle source
# File lib/sequel/adapters/ado.rb, line 163
def execute(sql, opts=OPTS)
  synchronize(opts[:server]) do |conn|
    begin
      r = log_connection_yield(sql, conn){conn.Execute(sql)}
      begin
        yield r if block_given?
      ensure
        begin
          r.close
        rescue ::WIN32OLERuntimeError
        end
      end
    rescue ::WIN32OLERuntimeError => e
      raise_error(e)
    end
  end
  nil
end
execute_ddl(sql, opts=OPTS) click to toggle source

Just execute so it doesn’t attempt to return the number of rows modified.

# File lib/sequel/adapters/ado.rb, line 138
def execute_ddl(sql, opts=OPTS)
  execute(sql, opts)
end
execute_dui(sql, opts=OPTS) click to toggle source

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 151
def execute_dui(sql, opts=OPTS)
  return super if opts[:provider]
  synchronize(opts[:server]) do |conn|
    begin
      log_connection_yield(sql, conn){conn.Execute(sql, 1)}
      WIN32OLE::ARGV[1]
    rescue ::WIN32OLERuntimeError => e
      raise_error(e)
    end
  end
end
execute_insert(sql, opts=OPTS) click to toggle source

Just execute so it doesn’t attempt to return the number of rows modified.

# File lib/sequel/adapters/ado.rb, line 143
def execute_insert(sql, opts=OPTS)
  execute(sql, opts)
end
freeze() click to toggle source
# File lib/sequel/adapters/ado.rb, line 132
def freeze
  @conversion_procs.freeze
  super
end