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An example of a general query function [7].

An example of a general query function [7].

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Figure 4. A general schema example [7].
Figure 5. Relational schema for address data [7].
Figure 6. Connectivity graph for schema in Figure 5 [7].
Figure 7. An example of a general query function [7].
+2 Figure 8. Query result in JSON format [7].
An overview of data integration principles for heterogeneous databases
Conference Paper
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  • May 2022
Modern large-scale information systems often use multiple database management systems, not all of which are necessarily relational. In recent years, NoSQL databases have gained acceptance in certain domains while relational databases remain de facto standard in many others. Many "legacy" information systems also use relational databases. Unlike rel...
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... this approach database adapters are used. They get the query parameters from a function like the one in Figure 7. This function's name specifies the database operation it performs. ...

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... From a single DB's perspective, data distilling can be distinguished from the backend DB system and merged into upper-layer business logic implementations. When it comes to concurrently distributed DBs, the DB integration technologies also emphasise data usage (distilling) at an abstract level, via standard user interfaces and uniform data access [27], [28]. However, data distilling is not separable from the fractal object of FDBS, even though it can be optionally implemented or ignored by different component systems. ...
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