fingerprint_node

in lib/pg_query/fingerprint.rb [67:120]

• 47 lines of code
• 28 McCabe index (conditional complexity)

    def fingerprint_node(node, hash, parent_node_name = nil, parent_field_name = nil) 
      return if ignored_node_type?(node)

      if node.is_a?(Node)
        return if node.node.nil?
        node_val = node[node.node.to_s]
        unless ignored_node_type?(node_val)
          unless node_val.is_a?(List)
            postgres_node_name = node_protobuf_field_name_to_json_name(node.class, node.node)
            hash.update(postgres_node_name)
          end
          fingerprint_value(node_val, hash, parent_node_name, parent_field_name, false)
        end
        return
      end

      postgres_node_name = node.class.name.split('::').last

      node.to_h.keys.sort.each do |field_name|
        val = node[field_name.to_s]

        postgres_field_name = node_protobuf_field_name_to_json_name(node.class, field_name)

        case postgres_field_name
        when 'location'
          next
        when 'name'
          next if [PrepareStmt, ExecuteStmt, DeallocateStmt].include?(node.class)
          next if node.is_a?(ResTarget) && parent_node_name == 'SelectStmt' && parent_field_name == 'targetList'
        when 'gid', 'options', 'savepoint_name'
          next if node.is_a?(TransactionStmt)
        when 'portalname'
          next if [DeclareCursorStmt, FetchStmt, ClosePortalStmt].include?(node.class)
        when 'relname'
          next if node.is_a?(RangeVar) && node.relpersistence == 't'
          if node.is_a?(RangeVar)
            fingerprint_value(val.gsub(/\d{2,}/, ''), hash, postgres_node_name, postgres_field_name, true)
            next
          end
        when 'stmt_len'
          next if node.is_a?(RawStmt)
        when 'stmt_location'
          next if node.is_a?(RawStmt)
        when 'kind'
          if node.is_a?(A_Expr) && (val == :AEXPR_OP_ANY || val == :AEXPR_IN)
            fingerprint_value(:AEXPR_OP, hash, postgres_node_name, postgres_field_name, true)
            next
          end
        end

        fingerprint_value(val, hash, postgres_node_name, postgres_field_name, true)
      end
    end