SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function dictGetOrDefault (children 1)
     ExpressionList (children 4)
      Literal \'hashed_dictionary\'
      Literal Tuple_(\'v1\', \'v2\')
      Literal UInt64_0
      Function tuple (children 1)
       ExpressionList (children 2)
        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
