Class: VORuby::ADQL::GroupBy

Inherits:
Object
  • Object
show all
Defined in:
lib/voruby/adql/adql.rb,
lib/voruby/adql/transforms.rb

Overview

Represents the Group By expression part of a query.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(columns) ⇒ GroupBy

Returns a new instance of GroupBy.



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# File 'lib/voruby/adql/adql.rb', line 2039

def initialize(columns)
  self.columns = columns
end

Instance Attribute Details

#columns ⇒ Object

Returns the value of attribute columns.



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# File 'lib/voruby/adql/adql.rb', line 2037

def columns
  @columns
end

Class Method Details

.from_xml(node) ⇒ Object 



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# File 'lib/voruby/adql/adql.rb', line 2058

def self.from_xml(node)
  columns = []
  node.elements.each('Column') do |col_node|
    col = Column.from_xml(col_node)
    columns.push(col)
  end

  return GroupBy.new(columns)
end

Instance Method Details

#to_adqls ⇒ Object 



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# File 'lib/voruby/adql/transforms.rb', line 385

def to_adqls
  cols = self.columns.collect{|x| x.to_adqls}.join(', ')
  "GROUP BY #{cols}"
end

#to_s ⇒ Object 



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# File 'lib/voruby/adql/adql.rb', line 2053

def to_s
  cols = self.columns.collect{|x| x.to_s}.join('|')
  "{columns=#{cols}}"
end