CreateQuery visits_order (children 3)
 Identifier visits_order
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration user_id (children 1)
    DataType UInt64
   ColumnDeclaration user_name (children 1)
    DataType String
   ColumnDeclaration some_int (children 1)
    DataType UInt64
 Storage definition (children 4)
  Function MergeTree (children 1)
   ExpressionList
  Identifier user_id
  Identifier user_id
  Set
