Class: Rgviz::Query

Inherits:
Object
  • Object
show all
Defined in:
lib/rgviz/nodes.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#formats ⇒ Object

Returns the value of attribute formats.



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# File 'lib/rgviz/nodes.rb', line 11

def formats
  @formats
end

#group_by ⇒ Object

Returns the value of attribute group_by.



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# File 'lib/rgviz/nodes.rb', line 5

def group_by
  @group_by
end

#labels ⇒ Object

Returns the value of attribute labels.



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# File 'lib/rgviz/nodes.rb', line 10

def labels
  @labels
end

#limit ⇒ Object

Returns the value of attribute limit.



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# File 'lib/rgviz/nodes.rb', line 8

def limit
  @limit
end

#offset ⇒ Object

Returns the value of attribute offset.



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# File 'lib/rgviz/nodes.rb', line 9

def offset
  @offset
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/rgviz/nodes.rb', line 12

def options
  @options
end

#order_by ⇒ Object

Returns the value of attribute order_by.



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# File 'lib/rgviz/nodes.rb', line 7

def order_by
  @order_by
end

#pivot ⇒ Object

Returns the value of attribute pivot.



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# File 'lib/rgviz/nodes.rb', line 6

def pivot
  @pivot
end

#select ⇒ Object

Returns the value of attribute select.



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# File 'lib/rgviz/nodes.rb', line 3

def select
  @select
end

#where ⇒ Object

Returns the value of attribute where.



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# File 'lib/rgviz/nodes.rb', line 4

def where
  @where
end

Instance Method Details

#accept(visitor) ⇒ Object 



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# File 'lib/rgviz/nodes.rb', line 18

def accept(visitor)
  if visitor.visit_query self
    select.accept visitor if select
    where.accept visitor if where
    group_by.accept visitor if group_by
    pivot.accept visitor if pivot
    order_by.accept visitor if order_by
    labels.each{|x| x.accept visitor} if labels
    formats.each{|x| x.accept visitor} if formats
  end
  visitor.end_visit_query self
end

#select? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rgviz/nodes.rb', line 14

def select?
  @select && @select.columns && @select.columns.length > 0
end

#to_s ⇒ Object 



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# File 'lib/rgviz/nodes.rb', line 31

def to_s
  str = ''
  if select
    if select.columns.empty?
      str << "select * "
    else
      str << "select #{select.to_s} "
    end
  end
  str << "where #{where} " if where
  str << "group by #{group_by} " if group_by
  str << "pivot #{pivot} " if pivot
  str << "order by #{order_by} " if order_by
  str << "limit #{limit} " if limit
  str << "offset #{offset} " if offset
  str << "label #{labels.map(&:to_s).join(', ')} " if labels
  str << "format #{formats.map(&:to_s).join(', ')} " if formats
  str << "options #{options} " if options
  str.strip
end