SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 8)
    Identifier a.pk
    Identifier b.pk
    Identifier a.dt
    Identifier b.dt
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier a.pk
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier b.pk
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Function materialize (children 1)
       ExpressionList (children 1)
        Identifier a.dt
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Function materialize (children 1)
       ExpressionList (children 1)
        Identifier b.dt
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (alias a) (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 2)
           Function greater (alias pk) (children 1)
            ExpressionList (children 2)
             Function toUInt8 (children 1)
              ExpressionList (children 1)
               Identifier number
             Literal UInt64_0
           Function toNullable (alias dt) (children 1)
            ExpressionList (children 1)
             Function toUInt8 (children 1)
              ExpressionList (children 1)
               Identifier number
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Function numbers (children 1)
              ExpressionList (children 1)
               Literal UInt64_3
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      Subquery (alias b) (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 2)
           Literal UInt64_1 (alias pk)
           Function toNullable (alias dt) (children 1)
            ExpressionList (children 1)
             Literal UInt64_0
     TableJoin (children 1)
      Function and (children 1)
       ExpressionList (children 2)
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier a.pk
          Identifier b.pk
        Function greaterOrEquals (children 1)
         ExpressionList (children 2)
          Identifier a.dt
          Identifier b.dt
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier a.dt