Class Sequel::ADO::Database
In: lib/sequel/adapters/ado.rb
Parent: Sequel::Database

Methods

Constants

DISCONNECT_ERROR_RE = /Communication link failure/
CommandTimeout = opts[:command_timeout] if opts[:command_timeout]
Provider = opts[:provider] if opts[:provider]

Public Instance methods

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.

[Source]

    # 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

[Source]

    # File lib/sequel/adapters/ado.rb, line 41
41:       def disconnect_connection(conn)
42:         conn.Close
43:       rescue WIN32OLERuntimeError
44:         nil
45:       end

[Source]

    # 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

Just execute so it doesn‘t attempt to return the number of rows modified.

[Source]

    # File lib/sequel/adapters/ado.rb, line 48
48:       def execute_ddl(sql, opts=OPTS)
49:         execute(sql, opts)
50:       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).

[Source]

    # 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

Just execute so it doesn‘t attempt to return the number of rows modified.

[Source]

    # File lib/sequel/adapters/ado.rb, line 53
53:       def execute_insert(sql, opts=OPTS)
54:         execute(sql, opts)
55:       end

[Validate]