# File lib/thinking_sphinx/source/sql.rb, line 87 def sql_group_clause internal_groupings = [] if @model.column_names.include?(@model.inheritance_column) internal_groupings << "#{@model.quoted_table_name}.#{quote_column(@model.inheritance_column)}" end ( ["#{@model.quoted_table_name}.#{quote_column(@model.primary_key_for_sphinx)}"] + @fields.collect { |field| field.to_group_sql }.compact + @attributes.collect { |attribute| attribute.to_group_sql }.compact + @groupings + internal_groupings ).join(", ") end