SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function dictGetOrDefault (children 1)
     ExpressionList (children 4)
      Literal \'hashed_array_dictionary\'
      Literal Tuple_(\'v1\', \'v2\')
      Function toUInt128 (children 1)
       ExpressionList (children 1)
        Literal UInt64_0
      Function tuple (children 1)
       ExpressionList (children 3)
        Function materialize (children 1)
         ExpressionList (children 1)
          Function toNullable (children 1)
           ExpressionList (children 1)
            Literal NULL
        Function intDiv (children 1)
         ExpressionList (children 2)
          Literal UInt64_1
          Identifier id
        Function intDiv (children 1)
         ExpressionList (children 2)
          Literal UInt64_1
          Identifier id
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier dictionary_source_table
