SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function concat (alias t) (children 1)
     ExpressionList (children 3)
      Literal Tuple_(UInt64_1, UInt64_2, UInt64_3)
      Literal Tuple_(\'a\', \'b\', \'c\')
      Function tuple (children 1)
       ExpressionList (children 2)
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'2020-10-08\'
          Literal \'Date\'
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'2020-11-08\'
          Literal \'Date\'
   ExpressionList (children 9)
    Identifier t
    Function tupleElement (children 1)
     ExpressionList (children 2)
      Identifier t
      Literal UInt64_1
    Function tupleElement (children 1)
     ExpressionList (children 2)
      Identifier t
      Literal UInt64_2
    Function tupleElement (children 1)
     ExpressionList (children 2)
      Identifier t
      Literal UInt64_3
    Function tupleElement (children 1)
     ExpressionList (children 2)
      Identifier t
      Literal UInt64_4
    Function tupleElement (children 1)
     ExpressionList (children 2)
      Identifier t
      Literal UInt64_5
    Function tupleElement (children 1)
     ExpressionList (children 2)
      Identifier t
      Literal UInt64_6
    Function tupleElement (children 1)
     ExpressionList (children 2)
      Identifier t
      Literal UInt64_7
    Function tupleElement (children 1)
     ExpressionList (children 2)
      Identifier t
      Literal UInt64_8
