SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function dictGetOrDefault (alias value_first) (children 1)
     ExpressionList (children 4)
      Literal \'cache_dictionary_complex_key_simple_attributes_short_circuit\'
      Literal \'value_first\'
      Function tuple (children 1)
       ExpressionList (children 2)
        Identifier number
        Function concat (children 1)
         ExpressionList (children 1)
          Function toString (children 1)
           ExpressionList (children 1)
            Identifier number
      Function toString (children 1)
       ExpressionList (children 1)
        Function materialize (children 1)
         ExpressionList (children 1)
          Literal \'default\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.numbers
   Literal UInt64_20
 Identifier Null
