SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 3)
    Function toUInt32 (children 1)
     ExpressionList (children 1)
      Identifier x
    Identifier y
    Identifier z
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier pk
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier x
     Function toDateTime (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
