CreateQuery stack (children 3)
 Identifier stack
 Columns definition (children 1)
  ExpressionList (children 6)
   ColumnDeclaration item_id (children 1)
    DataType Int64
   ColumnDeclaration brand_id (children 1)
    DataType Int64
   ColumnDeclaration rack_id (children 1)
    DataType Int64
   ColumnDeclaration dt (children 1)
    DataType DateTime
   ColumnDeclaration expiration_dt (children 1)
    DataType DateTime
   ColumnDeclaration quantity (children 1)
    DataType UInt64
 Storage definition (children 4)
  Function MergeTree
  Function toYYYYMM (children 1)
   ExpressionList (children 1)
    Identifier dt
  Function tuple (children 1)
   ExpressionList (children 2)
    Identifier brand_id
    Function toStartOfHour (children 1)
     ExpressionList (children 1)
      Identifier dt
  Set