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The INSTANCEOF operator in reference qualifiers

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The INSTANCEOF operator in reference qualifiers

You can use the INSTANCEOF operator in a reference qualifier to shorten or simplify a complex class qualifier.

For example, use the INSTANCEOF operator for a reference field to the cmdb_ci table to specify that all subclasses of a class are included in the results. The following reference qualifier returns all servers, including Linux, UNIX, Windows, and so on, because each of those subclasses extend the cmdb_ci_server class.


In another example, you can simplify the following reference qualifier in a similar way.


Using the INSTANCEOF operator, the reference qualifier is rewritten as follows because the server subclasses extend the cmdb_ci_computer class.