module Arel::FactoryMethods

# File lib/arel/factory_methods.rb, line 17
def create_and clauses
  Nodes::And.new clauses
end

# File lib/arel/factory_methods.rb, line 9
def create_join to, constraint = nil, klass = Nodes::InnerJoin
  klass.new(to, constraint)
end

# File lib/arel/factory_methods.rb, line 21
def create_on expr
  Nodes::On.new expr
end

# File lib/arel/factory_methods.rb, line 13
def create_string_join to
  create_join to, nil, Nodes::StringJoin
end

# File lib/arel/factory_methods.rb, line 5
def create_table_alias relation, name
  Nodes::TableAlias.new(relation, name)
end

# File lib/arel/factory_methods.rb, line 25
def grouping expr
  Nodes::Grouping.new expr
end

# File lib/arel/factory_methods.rb, line 31
def lower column
  Nodes::NamedFunction.new 'LOWER', [column]
end