SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function equals (children 1)
     ExpressionList (children 2)
      Function count (children 1)
       ExpressionList
      Literal UInt64_33333
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier null_in_subquery
   Function globalIn (children 1)
    ExpressionList (children 2)
     Identifier idx
     Subquery (children 1)
      SelectWithUnionQuery (children 1)
       ExpressionList (children 1)
        SelectQuery (children 3)
         ExpressionList (children 1)
          Identifier idx
         TablesInSelectQuery (children 1)
          TablesInSelectQueryElement (children 1)
           TableExpression (children 1)
            TableIdentifier null_in_subquery
         Function equals (children 1)
          ExpressionList (children 2)
           Identifier dt
           Literal UInt64_2
