| 摘要 |
A method comprises accessing data in a data warehouse having a hierarchical tree with a default successor and at least one non-default successor, where the non-default successors represent data information in databases of the data warehouse. A query comprising given information on data of interest is received and responded to with a response on the data of interest. When the given information comprises an instance of a default successor, the data of interest cannot be identified as available from the databases. When the given information has compatibility with more than one non-default successor, the data of interest may be available from the databases. When the given information has compatibility with one non-default successor, the data of interest has been identified as available from one non-default successor. |
