Class: Innodb::System

Inherits:
Object
  • Object
show all
Defined in:
lib/innodb/system.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(system_space_file) ⇒ System

Returns a new instance of System.



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# File 'lib/innodb/system.rb', line 7

def initialize(system_space_file)
  @config = {
    :datadir => ".",
  }
  @spaces = {}
  @spaces[0] = Innodb::Space.new(system_space_file)
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/innodb/system.rb', line 4

def config
  @config
end

#spaces ⇒ Object

Returns the value of attribute spaces.



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# File 'lib/innodb/system.rb', line 5

def spaces
  @spaces
end

Instance Method Details

#add_space(space) ⇒ Object 



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# File 'lib/innodb/system.rb', line 81

def add_space(space)
  @spaces[space.space_id] = space
end

#add_space_file(space_file) ⇒ Object 



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# File 'lib/innodb/system.rb', line 85

def add_space_file(space_file)
  add_space(Innodb::Space.new(space_file))
end

#each_index ⇒ Object 



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# File 'lib/innodb/system.rb', line 41

def each_index
  unless block_given?
    return enum_for(:each_index)
  end

  each_record_from_data_dictionary_index(:SYS_INDEXES, :PRIMARY) do |record|
    yield record.fields
  end
end

#each_record_from_data_dictionary_index(table, index) ⇒ Object 



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# File 'lib/innodb/system.rb', line 19

def each_record_from_data_dictionary_index(table, index)
  unless block_given?
    return enum_for(:each_record_from_data_dictionary_index, table, index)
  end

  index = system_space.data_dictionary.index(table, index)
  index.each_record do |record|
    yield record
  end
  nil
end

#each_table ⇒ Object 



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# File 'lib/innodb/system.rb', line 31

def each_table
  unless block_given?
    return enum_for(:each_table)
  end

  each_record_from_data_dictionary_index(:SYS_TABLES, :PRIMARY) do |record|
    yield record.fields
  end
end

#index_by_id(value) ⇒ Object 



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# File 'lib/innodb/system.rb', line 67

def index_by_id(value)
  object_by_field(:each_index, "ID", value)
end

#index_by_name(table_name, index_name) ⇒ Object 



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# File 'lib/innodb/system.rb', line 71

def index_by_name(table_name, index_name)
  unless table = table_by_name(table_name)
    return nil
  end

  object_by_two_fields(:each_index,
                       "TABLE_ID", table["ID"],
                       "NAME", index_name)
end

#object_by_field(method, field, value) ⇒ Object 



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# File 'lib/innodb/system.rb', line 51

def object_by_field(method, field, value)
  send(method).select { |o| o[field] == value }.first
end

#object_by_two_fields(method, f1, v1, f2, v2) ⇒ Object 



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# File 'lib/innodb/system.rb', line 55

def object_by_two_fields(method, f1, v1, f2, v2)
  send(method).select { |o| o[f1] == v1 && o[f2] == v2 }.first
end

#system_space ⇒ Object 



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# File 'lib/innodb/system.rb', line 15

def system_space
  @spaces[0]
end

#table_by_id(value) ⇒ Object 



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# File 'lib/innodb/system.rb', line 59

def table_by_id(value)
  object_by_field(:each_table, "ID", value)
end

#table_by_name(value) ⇒ Object 



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# File 'lib/innodb/system.rb', line 63

def table_by_name(value)
  object_by_field(:each_table, "NAME", value)
end