Graph query adaptation

1. A non-transitory computer-readable medium storing computer-executable instructions that when executed by a computer cause the computer to perform a method, the method comprising:

generating, in response to detecting a pre-specified sub-graph in a base topological query, an adapted topological query from a base topological query,

the generating including replacing the pre-specified sub-graph with an adapted sub-graph by attaching a first end of a directed edge to a node in the adapted topological query that corresponds to a node in the base topological query and attaching a second end of the directed edge to a node in the adapted sub-graph, the node in the base topological query connected to a node in the pre-specified sub-graph by as base edge;

executing the adapted topological query on a stored graph to generate a query result; and providing the query result.

2. The non-transitory computer-readable medium of claim 1 , where the pre-specified sub-graph is a single node.

3. The non-transitory computer-readable medium of claim 1 , the method comprising receiving the base topological query from a client and where the query result is provided to the client.

4. The non-transitory computer-readable medium of claim 1 , the method comprising detecting the pre-specified sub-graph by detecting an element in the pre-specified sub-graph, where the element shares an attribute with a placeholder element of a template graph.

5. The non-transitory computer-readable medium of claim 1 , wherein the replacing the pre-specified sub-graph with an adapted sub-graph is in response to detecting the base edge that connects the node in the base topological query to the node in the pre-specified sub-graph.

6. The non-transitory computer-readable medium of claim 1 , where the adapted sub-graph comprises information extracted from the base topological query based on a pattern graph.

7. The non-transitory computer-readable medium of claim 1 , the method comprising contracting the query result.

8. The non-transitory computer-readable medium of claim 7 , the method comprising contracting the query result by replacing an instance of the adapted sub-graph in the query result with the pre-specified sub-graph.

9. The non-transitory computer-readable medium of claim 1 , where nodes in the stored graph represent elements of an information technology (IT) infrastructure and where edges in the graph represent relationships between the elements of the IT infrastructure.

10. A system, comprising:

a configuration management data store (CMDB) to store descriptions of components of an information technology (IT) infrastructure and to store a directed graph describing relationships between the components of the IT infrastructure;

a calculated class logic to transform an application query that complies with an application model into a graph query that complies with a graph model, where the application query is transformed as a function of calculated class data that describes a sub-graph that is to replace a portion of the application query in the graph query and how to preserve logical conditions and links associated with the portion of the application query in the graph query, where the application model is associated with an application, and where the graph model is associated with the directed graph; and

a topological query logic to execute the graph query on the directed graph and to provide a result graph as a function the graph query.

11. The system of claim 10 , comprising a reversal logic to transform the result graph that complies with the graph model into a result graph that complies with the application model.

12. The system of claim 11 , where the reversal logic rewinds stack data generated by the calculated class logic to transform the result graph that complies with the graph model into the result graph that complies with the application model, where the stack data describes a series of transformations made by the calculated class logic.

13. A system, comprising:

means for transforming a query from a first model associated with an application to a second model associated with a stored graph and generating a transformation history;

means for executing the query on the stored graph to generate a query result; and

means for transforming the query result from the second model to the first model and reading the transformation history,

the transformation history describing a process by which the query was transformed from the first model to the second model,

the means for transforming the query result reverses actions described in the process.

14. The system of claim 13 , comprising means for receiving the query from a client and means for providing a transformed query result to the client.

15. The system of claim 13 , comprising means for storing the stored graph.