SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Identifier t
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (alias na) (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 1)
           Function CAST (alias t) (children 1)
            ExpressionList (children 2)
             Literal \'[(1, \\\'a\\\')]\'
             Literal \'String\'
          ExpressionList (children 3)
           ExpressionList (children 1)
            Literal UInt64_1
           ExpressionList (children 1)
            Function printf (children 1)
             ExpressionList (children 2)
              Function printf (children 1)
               ExpressionList (children 8)
                Literal NULL
                Literal UInt64_7
                Function printf (children 1)
                 ExpressionList (children 7)
                  Function isNullable (children 1)
                   ExpressionList (children 1)
                    Literal UInt64_7
                  Literal UInt64_7
                  Literal \'%%d: %d\'
                  Literal UInt64_7
                  Literal UInt64_7
                  Literal UInt64_7
                  Literal NULL
                Literal UInt64_7
                Function materialize (children 1)
                 ExpressionList (children 1)
                  Function toUInt256 (children 1)
                   ExpressionList (children 1)
                    Literal UInt64_7
                Literal \'%%d: %d\'
                Function isNull (children 1)
                 ExpressionList (children 1)
                  Function toNullable (children 1)
                   ExpressionList (children 1)
                    Literal UInt64_7
                Literal UInt64_7
              Function materialize (children 1)
               ExpressionList (children 1)
                Function toNullable (children 1)
                 ExpressionList (children 1)
                  Literal NULL
           ExpressionList (children 1)
            Function isNull (children 1)
             ExpressionList (children 1)
              Function isZeroOrNull (children 1)
               ExpressionList (children 1)
                Function isNullable (children 1)
                 ExpressionList (children 1)
                  Literal UInt64_7
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 1)
           Function CAST (alias t) (children 1)
            ExpressionList (children 2)
             Function toNullable (children 1)
              ExpressionList (children 1)
               Literal \'[(1, \\\'a\\\')]\'
             Literal \'String\'
          ExpressionList (children 3)
           Literal UInt64_1
           Function toNullable (children 1)
            ExpressionList (children 1)
             Function toUInt256 (children 1)
              ExpressionList (children 1)
               Literal UInt64_123
           Function printf (children 1)
            ExpressionList (children 1)
             Function printf (children 1)
              ExpressionList (children 9)
               Literal NULL
               Asterisk
               Function printf (children 1)
                ExpressionList (children 10)
                 Literal NULL
                 Literal UInt64_7
                 Literal UInt64_7
                 Literal UInt64_7
                 Literal \'%%d: %d\'
                 Literal UInt64_7
                 Literal UInt64_7
                 Function materialize (children 1)
                  ExpressionList (children 1)
                   Literal UInt64_7
                 Literal UInt64_7
                 Literal UInt64_7
               Literal UInt64_7
               Literal UInt64_7
               Literal \'%%d: %d\'
               Literal UInt64_7
               Literal UInt64_7
               Literal UInt64_7
     TableJoin
   Set
