CreateQuery simple (children 3)
 Identifier simple
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration id (children 1)
    DataType UInt64
   ColumnDeclaration val (children 1)
    DataType SimpleAggregateFunction (children 1)
     ExpressionList (children 2)
      Identifier sum
      DataType Double
 Storage definition (children 2)
  Function AggregatingMergeTree
  Identifier id