45 lines
947 B
Ruby
45 lines
947 B
Ruby
|
# frozen_string_literal: true
|
||
|
|
module Arel
|
||
|
|
module Nodes
|
||
|
|
class Function < Arel::Nodes::Node
|
||
|
|
include Arel::Predications
|
||
|
|
include Arel::WindowPredications
|
||
|
|
include Arel::OrderPredications
|
||
|
|
attr_accessor :expressions, :alias, :distinct
|
||
|
|
|
||
|
|
def initialize expr, aliaz = nil
|
||
|
|
super()
|
||
|
|
@expressions = expr
|
||
|
|
@alias = aliaz && SqlLiteral.new(aliaz)
|
||
|
|
@distinct = false
|
||
|
|
end
|
||
|
|
|
||
|
|
def as aliaz
|
||
|
|
self.alias = SqlLiteral.new(aliaz)
|
||
|
|
self
|
||
|
|
end
|
||
|
|
|
||
|
|
def hash
|
||
|
|
[@expressions, @alias, @distinct].hash
|
||
|
|
end
|
||
|
|
|
||
|
|
def eql? other
|
||
|
|
self.class == other.class &&
|
||
|
|
self.expressions == other.expressions &&
|
||
|
|
self.alias == other.alias &&
|
||
|
|
self.distinct == other.distinct
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
%w{
|
||
|
|
Sum
|
||
|
|
Exists
|
||
|
|
Max
|
||
|
|
Min
|
||
|
|
Avg
|
||
|
|
}.each do |name|
|
||
|
|
const_set(name, Class.new(Function))
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|