SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function CAST (alias x) (children 1)
     ExpressionList (children 2)
      Literal \'{}\'
      Literal \'JSON\'
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier x.^`c0`
     Literal UInt64_1
