Class: Sequel::Mysql2::Database

Inherits:
Database show all
Includes:
Sequel::MySQL::DatabaseMethods
Defined in:
lib/sequel/adapters/mysql2.rb

Overview

Database class for MySQL databases used with Sequel.

Constant Summary collapse

MYSQL_DATABASE_DISCONNECT_ERRORS =

Mysql::Error messages that indicate the current connection should be disconnected

/\A(Commands out of sync; you can't run this command now|Can't connect to local MySQL server through socket|MySQL server has gone away)/

Constants included from Sequel::MySQL::DatabaseMethods

Sequel::MySQL::DatabaseMethods::AUTO_INCREMENT, Sequel::MySQL::DatabaseMethods::CAST_TYPES, Sequel::MySQL::DatabaseMethods::PRIMARY

Constants inherited from Database

Database::ADAPTERS, Database::AUTOINCREMENT, Database::CASCADE, Database::COMMA_SEPARATOR, Database::MSSQL_DEFAULT_RE, Database::MYSQL_TIMESTAMP_RE, Database::NOT_NULL, Database::NO_ACTION, Database::NULL, Database::POSTGRES_DEFAULT_RE, Database::PRIMARY_KEY, Database::RESTRICT, Database::SET_DEFAULT, Database::SET_NULL, Database::SQL_BEGIN, Database::SQL_COMMIT, Database::SQL_RELEASE_SAVEPOINT, Database::SQL_ROLLBACK, Database::SQL_ROLLBACK_TO_SAVEPOINT, Database::SQL_SAVEPOINT, Database::STRING_DEFAULT_RE, Database::TEMPORARY, Database::TRANSACTION_BEGIN, Database::TRANSACTION_COMMIT, Database::TRANSACTION_ISOLATION_LEVELS, Database::TRANSACTION_ROLLBACK, Database::UNDERSCORE, Database::UNIQUE, Database::UNSIGNED

Instance Attribute Summary

Attributes inherited from Database

#default_schema, #log_warn_duration, #loggers, #opts, #pool, #prepared_statements, #transaction_isolation_level

Instance Method Summary collapse

Methods included from Sequel::MySQL::DatabaseMethods

#cast_type_literal, #commit_prepared_transaction, #database_type, #indexes, #rollback_prepared_transaction, #supports_prepared_transactions?, #supports_savepoints?, #supports_transaction_isolation_levels?, #tables, #use

Methods inherited from Database

#<<, #[], adapter_class, adapter_scheme, #adapter_scheme, #add_column, #add_index, #add_servers, #alter_table, #call, #cast_type_literal, connect, #create_or_replace_view, #create_table, #create_table!, #create_table?, #create_view, #database_type, #disconnect, #drop_column, #drop_index, #drop_table, #drop_view, #dump_indexes_migration, #dump_schema_migration, #dump_table_schema, #each_server, #execute_ddl, #execute_dui, #execute_insert, #fetch, #from, #get, identifier_input_method, #identifier_input_method, #identifier_input_method=, identifier_input_method=, #identifier_output_method, identifier_output_method, identifier_output_method=, #identifier_output_method=, #indexes, #initialize, #inspect, #literal, #log_info, #log_yield, #logger=, #query, #quote_identifiers=, quote_identifiers=, #quote_identifiers?, #remove_servers, #rename_column, #rename_table, #run, #schema, #select, #serial_primary_key_options, #servers, #set_column_default, #set_column_type, single_threaded=, #single_threaded?, #supports_prepared_transactions?, #supports_savepoints?, #supports_transaction_isolation_levels?, #synchronize, #table_exists?, #tables, #test_connection, #transaction, #typecast_value, #uri, #url

Methods included from Sequel::Metaprogramming

#meta_def

Constructor Details

This class inherits a constructor from Sequel::Database

Instance Method Details

#connect(server) ⇒ Object

Connect to the database. In addition to the usual database options, the following options have effect:

  • :auto_is_null - Set to true to use MySQL default behavior of having a filter for an autoincrement column equals NULL to return the last inserted row.

  • :charset - Same as :encoding (:encoding takes precendence)

  • :compress - Set to false to not compress results from the server

  • :config_default_group - The default group to read from the in the MySQL config file.

  • :config_local_infile - If provided, sets the Mysql::OPT_LOCAL_INFILE option on the connection with the given value.

  • :encoding - Set all the related character sets for this connection (connection, client, database, server, and results).

  • :socket - Use a unix socket file instead of connecting via TCP/IP.

  • :timeout - Set the timeout in seconds before the server will disconnect this connection.



34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
 
# File 'lib/sequel/adapters/mysql2.rb', line 34

def connect(server)
  opts = server_opts(server)
  opts[:host] ||= 'localhost'
  opts[:username] ||= opts[:user]
  conn = ::Mysql2::Client.new(opts)

  sqls = []
  # Set encoding a slightly different way after connecting,
  # in case the READ_DEFAULT_GROUP overrode the provided encoding.
  # Doesn't work across implicit reconnects, but Sequel doesn't turn on
  # that feature.
  if encoding = opts[:encoding] || opts[:charset]
    sqls << "SET NAMES #{conn.escape(encoding.to_s)}"
  end

  # increase timeout so mysql server doesn't disconnect us
  sqls << "SET @@wait_timeout = #{opts[:timeout] || 2592000}"

  # By default, MySQL 'where id is null' selects the last inserted id
  sqls << "SET SQL_AUTO_IS_NULL=0" unless opts[:auto_is_null]

  sqls.each{|sql| log_yield(sql){conn.query(sql)}}

  conn
end

#dataset(opts = nil) ⇒ Object

Returns instance of Sequel::MySQL::Dataset with the given options.



61
62
63
 
# File 'lib/sequel/adapters/mysql2.rb', line 61

def dataset(opts = nil)
  Mysql2::Dataset.new(self, opts)
end

#execute(sql, opts = {}, &block) ⇒ Object

Executes the given SQL using an available connection, yielding the connection if the block is given.



67
68
69
70
71
72
73
 
# File 'lib/sequel/adapters/mysql2.rb', line 67

def execute(sql, opts={}, &block)
  if opts[:sproc]
    call_sproc(sql, opts, &block)
  else
    synchronize(opts[:server]){|conn| _execute(conn, sql, opts, &block)}
  end
end

#server_version(server = nil) ⇒ Object

Return the version of the MySQL server two which we are connecting.



76
77
78
 
# File 'lib/sequel/adapters/mysql2.rb', line 76

def server_version(server=nil)
  @server_version ||= (synchronize(server){|conn| conn.server_info[:id]} || super)
end