Module: Droonga::DatabaseScanner

Included in:
Plugins::Dump::Dumper, Plugins::System::StatisticsObjectCountHandler
Defined in:
lib/droonga/database_scanner.rb

Instance Method Summary collapse

Instance Method Details

#each_index_columns(&block) ⇒ Object 



98
99
100
101
102
103
104
 
# File 'lib/droonga/database_scanner.rb', line 98

def each_index_columns(&block)
  each_table do |table|
    table.columns.each do |column|
      yield(column) if index_column?(column)
    end
  end
end

#each_table(&block) ⇒ Object 



60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
 
# File 'lib/droonga/database_scanner.rb', line 60

def each_table(&block)
  options = {
    :ignore_missing_object => true,
    :order_by => :key,
  }
  reference_tables = []
  @context.database.each(options) do |object|
    next unless table?(object)
    if reference_table?(object)
      reference_tables << object
      next
    end
    yield(object)
  end
  reference_tables.each do |reference_table|
    yield(object)
  end
end

#index_column?(column) ⇒ Boolean

Returns:

  • (Boolean) 


94
95
96
 
# File 'lib/droonga/database_scanner.rb', line 94

def index_column?(column)
  column.is_a?(::Groonga::IndexColumn)
end

#index_only_table?(table) ⇒ Boolean

Returns:

  • (Boolean) 


87
88
89
90
91
92
 
# File 'lib/droonga/database_scanner.rb', line 87

def index_only_table?(table)
  return false if table.columns.empty?
  table.columns.all? do |column|
    index_column?(column)
  end
end

#n_columns ⇒ Object 



28
29
30
31
32
33
34
 
# File 'lib/droonga/database_scanner.rb', line 28

def n_columns
  n_columns = 0
  each_table do |table|
    n_columns += table.columns.size
  end
  n_columns
end

#n_records ⇒ Object 



36
37
38
39
40
41
42
43
44
 
# File 'lib/droonga/database_scanner.rb', line 36

def n_records
  n_records = 0
  each_table do |table|
    unless index_only_table?(table)
      n_records += table.size
    end
  end
  n_records
end

#n_tables ⇒ Object 



20
21
22
23
24
25
26
 
# File 'lib/droonga/database_scanner.rb', line 20

def n_tables
  n_tables  = 0
  each_table do |table|
    n_tables += 1
  end
  n_tables
end

#reference_table?(table) ⇒ Boolean

Returns:

  • (Boolean) 


83
84
85
 
# File 'lib/droonga/database_scanner.rb', line 83

def reference_table?(table)
  table.support_key? and table?(table.domain)
end

#table?(object) ⇒ Boolean

Returns:

  • (Boolean) 


79
80
81
 
# File 'lib/droonga/database_scanner.rb', line 79

def table?(object)
  object.is_a?(::Groonga::Table)
end

#total_n_objects ⇒ Object 



46
47
48
49
50
51
52
53
54
55
56
57
58
 
# File 'lib/droonga/database_scanner.rb', line 46

def total_n_objects
  n_tables  = 0
  n_columns = 0
  n_records = 0
  each_table do |table|
    n_tables += 1
    n_columns += table.columns.size
    unless index_only_table?(table)
      n_records += table.size
    end
  end
  n_tables + n_columns + n_records
end