SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 5)
   ExpressionList (children 1)
    Identifier val
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier tab
   Function notEquals (children 1)
    ExpressionList (children 2)
     Function now64 (children 1)
      ExpressionList (children 2)
       Literal UInt64_9
       Identifier tz
     Function toDateTime64 (children 1)
      ExpressionList (children 2)
       Literal \'2000-01-01 00:00:00\'
       Literal UInt64_6
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier val
   Set