SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Literal UInt64_1 (alias x)
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t_str
   Function lessOrEquals (children 1)
    ExpressionList (children 2)
     Function CAST (children 1)
      ExpressionList (children 2)
       Literal \'1970-01-01\'
       Literal \'date\'
     Function CAST (children 1)
      ExpressionList (children 2)
       Subquery (children 1)
        SelectWithUnionQuery (children 1)
         ExpressionList (children 1)
          SelectQuery (children 2)
           ExpressionList (children 1)
            Function max (children 1)
             ExpressionList (children 1)
              Literal \'1970-01-01\'
           TablesInSelectQuery (children 1)
            TablesInSelectQueryElement (children 1)
             TableExpression (children 1)
              Function numbers (children 1)
               ExpressionList (children 1)
                Literal UInt64_1
       Literal \'date\'
