SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function arrayCompact (alias x) (children 1)
     ExpressionList (children 1)
      Function array (children 1)
       ExpressionList (children 2)
        Function toDecimal64 (children 1)
         ExpressionList (children 2)
          Literal Float64_1
          Literal UInt64_8
        Function toDecimal64 (children 1)
         ExpressionList (children 2)
          Literal Float64_1
          Literal UInt64_8
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier x