CreateQuery moving_sum_num (children 3)
 Identifier moving_sum_num
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration k (children 1)
    DataType String
   ColumnDeclaration dt (children 1)
    DataType DateTime
   ColumnDeclaration v (children 1)
    DataType UInt64
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList (children 2)
    Identifier k
    Identifier dt