Class: Sequel::MySQL::Database

### Home Classes Methods

### In Files

- lib/sequel/adapters/mysql.rb

### Parent

Sequel::Database

### Methods

- #call_sproc
- #connect
- #dataset
- #execute
- #server_version

### Included Modules

- Sequel::MySQL::DatabaseMethods

### Files

- CHANGELOG
- COPYING
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- opening_databases.rdoc
- prepared_statements.rdoc
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- reflection.rdoc
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- 3.6.0.txt
- 3.7.0.txt
- 3.8.0.txt
- 3.9.0.txt
- sharding.rdoc
- sql.rdoc
- virtual_rows.rdoc

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No matching classes.

# Sequel::MySQL::Database

Database class for MySQL databases used with Sequel.

### Constants

MYSQL_DATABASE_DISCONNECT_ERRORS

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

### Public Instance Methods

call_sproc(name, opts={}, &block) click to toggle source

Support stored procedures on MySQL

    # File lib/sequel/adapters/mysql.rb, line 75
    def call_sproc(name, opts={}, &block)
      args = opts[:args] || []
      execute("CALL #{name}#{args.empty? ? '()' : literal(args)}", opts.merge(:sproc=>false), &block)
    end

connect(server) click to toggle source

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.

    # File lib/sequel/adapters/mysql.rb, line 97
    def connect(server)
      opts = server_opts(server)
      conn = Mysql.init
      conn.options(Mysql::READ_DEFAULT_GROUP, opts[:config_default_group] || "client")
      conn.options(Mysql::OPT_LOCAL_INFILE, opts[:config_local_infile]) if opts.has_key?(:config_local_infile)
      conn.real_connect(
        opts[:host] || 'localhost',
        opts[:user],
        opts[:password],
        opts[:database],
        opts[:port],
        opts[:socket],
        Mysql::CLIENT_MULTI_RESULTS +
        Mysql::CLIENT_MULTI_STATEMENTS +
        (opts[:compress] == false ? 0 : Mysql::CLIENT_COMPRESS)
      )
      if encoding = opts[:encoding] || opts[:charset]
        # Setting encoding before the connect appears not to work
        # with READ_DEFAULT_GROUP, so set it afterwards.
        conn.options(Mysql::SET_CHARSET_NAME, encoding)
      end

      # increase timeout so mysql server doesn't disconnect us
      conn.query("set @@wait_timeout = #{opts[:timeout] || 2592000}")

      # By default, MySQL 'where id is null' selects the last inserted id
      conn.query("set SQL_AUTO_IS_NULL=0") unless opts[:auto_is_null]

      class << conn
        attr_accessor :prepared_statements
      end
      conn.prepared_statements = {}
      conn
    end

dataset(opts = nil) click to toggle source

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

    # File lib/sequel/adapters/mysql.rb, line 133
    def dataset(opts = nil)
      MySQL::Dataset.new(self, opts)
    end

execute(sql, opts={}, &block) click to toggle source

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

    # File lib/sequel/adapters/mysql.rb, line 139
    def execute(sql, opts={}, &block)
      if opts[:sproc]
        call_sproc(sql, opts, &block)
      elsif sql.is_a?(Symbol)
        execute_prepared_statement(sql, opts, &block)
      else
        synchronize(opts[:server]){|conn| _execute(conn, sql, opts, &block)}
      end
    end

server_version(server=nil) click to toggle source

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

    # File lib/sequel/adapters/mysql.rb, line 150
    def server_version(server=nil)
      @server_version ||= (synchronize(server){|conn| conn.server_version if conn.respond_to?(:server_version)} || super)
    end

[Validate]

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