Module Sequel::MSSQL::DatabaseMethods
In: lib/sequel/adapters/shared/mssql.rb

Methods

Constants

AUTO_INCREMENT = 'IDENTITY(1,1)'.freeze
SERVER_VERSION_RE = /^(\d+)\.(\d+)\.(\d+)/.freeze
SERVER_VERSION_SQL = "SELECT CAST(SERVERPROPERTY('ProductVersion') AS varchar)".freeze
SQL_BEGIN = "BEGIN TRANSACTION".freeze
SQL_COMMIT = "COMMIT TRANSACTION".freeze
SQL_ROLLBACK = "IF @@TRANCOUNT > 0 ROLLBACK TRANSACTION".freeze
SQL_ROLLBACK_TO_SAVEPOINT = 'IF @@TRANCOUNT > 0 ROLLBACK TRANSACTION autopoint_%d'.freeze
SQL_SAVEPOINT = 'SAVE TRANSACTION autopoint_%d'.freeze
DECIMAL_TYPE_RE = /number|numeric|decimal/io   The types to check for 0 scale to transform :decimal types to :integer.

Attributes

mssql_unicode_strings  [RW]  Whether to use N’’ to quote strings, which allows unicode characters inside the strings. True by default for compatibility, can be set to false for a possible performance increase. This sets the default for all datasets created from this Database object.

Public Instance methods

Microsoft SQL Server uses the :mssql type.

[Source]

    # File lib/sequel/adapters/shared/mssql.rb, line 27
27:       def database_type
28:         :mssql
29:       end

Microsoft SQL Server namespaces indexes per table.

[Source]

    # File lib/sequel/adapters/shared/mssql.rb, line 32
32:       def global_index_namespace?
33:         false
34:       end

Use the system tables to get index information

[Source]

    # File lib/sequel/adapters/shared/mssql.rb, line 37
37:       def indexes(table, opts={})
38:         m = output_identifier_meth
39:         im = input_identifier_meth
40:         indexes = {}
41:         metadata_dataset.from(:sys__tables___t).
42:          join(:sys__indexes___i, :object_id=>:object_id).
43:          join(:sys__index_columns___ic, :object_id=>:object_id, :index_id=>:index_id).
44:          join(:sys__columns___c, :object_id=>:object_id, :column_id=>:column_id).
45:          select(:i__name, :i__is_unique, :c__name___column).
46:          where{{t__name=>im.call(table)}}.
47:          where(:i__is_primary_key=>0, :i__is_disabled=>0).
48:          order(:i__name, :ic__index_column_id).
49:          each do |r|
50:           index = indexes[m.call(r[:name])] ||= {:columns=>[], :unique=>(r[:is_unique] && r[:is_unique]!=0)}
51:           index[:columns] << m.call(r[:column])
52:         end
53:         indexes
54:       end

The version of the MSSQL server, as an integer (e.g. 10001600 for SQL Server 2008 Express).

[Source]

    # File lib/sequel/adapters/shared/mssql.rb, line 58
58:       def server_version(server=nil)
59:         return @server_version if @server_version
60:         @server_version = synchronize(server) do |conn|
61:           (conn.server_version rescue nil) if conn.respond_to?(:server_version)
62:         end
63:         unless @server_version
64:           m = SERVER_VERSION_RE.match(fetch(SERVER_VERSION_SQL).single_value.to_s)
65:           @server_version = (m[1].to_i * 1000000) + (m[2].to_i * 10000) + m[3].to_i
66:         end
67:         @server_version
68:       end

MSSQL supports savepoints, though it doesn‘t support committing/releasing them savepoint

[Source]

    # File lib/sequel/adapters/shared/mssql.rb, line 71
71:       def supports_savepoints?
72:         true
73:       end

MSSQL supports transaction isolation levels

[Source]

    # File lib/sequel/adapters/shared/mssql.rb, line 76
76:       def supports_transaction_isolation_levels?
77:         true
78:       end

MSSQL supports transaction DDL statements.

[Source]

    # File lib/sequel/adapters/shared/mssql.rb, line 81
81:       def supports_transactional_ddl?
82:         true
83:       end

Microsoft SQL Server supports using the INFORMATION_SCHEMA to get information on tables.

[Source]

    # File lib/sequel/adapters/shared/mssql.rb, line 87
87:       def tables(opts={})
88:         information_schema_tables('BASE TABLE', opts)
89:       end

Microsoft SQL Server supports using the INFORMATION_SCHEMA to get information on views.

[Source]

    # File lib/sequel/adapters/shared/mssql.rb, line 93
93:       def views(opts={})
94:         information_schema_tables('VIEW', opts)
95:       end

[Validate]