SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Function equals (children 1)
     ExpressionList (children 2)
      Function sum (children 1)
       ExpressionList (children 1)
        Identifier struct.key
      Literal UInt64_30
    Function equals (children 1)
     ExpressionList (children 2)
      Function sum (children 1)
       ExpressionList (children 1)
        Identifier struct.value
      Literal UInt64_30
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 3)
          ExpressionList (children 2)
           Identifier struct.key
           Identifier struct.value
          TablesInSelectQuery (children 2)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier test_table
           TablesInSelectQueryElement (children 1)
            ArrayJoin (children 1)
             ExpressionList (children 1)
              Identifier struct
          Function equals (children 1)
           ExpressionList (children 2)
            Identifier day
            Literal \'2020-01-01\'