CreateQuery invalid_simple_agg_state_null (children 3)
 Identifier invalid_simple_agg_state_null
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration id (children 1)
    DataType SimpleAggregateFunction (children 1)
     ExpressionList (children 2)
      Identifier sum
      DataType Nullable (children 1)
       ExpressionList (children 1)
        DataType UInt64
 Storage definition (children 2)
  Function MergeTree
  Identifier id
