July 2017
Intermediate to advanced
414 pages
11h 18m
English
Content preview from Spring 5.0 Microservices - Second Edition
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Native queries
The Hibernate framework provides a good abstraction over the underlying databases. It generates efficient SQL statements, in most of the cases targeting the database using specific dialects. However, sometimes, writing native JDBC SQLs offers better performance and resource efficiency. In some cases, using native database functions gives even better performance.
The single database approach was working good at the beginning. But over a period of time, it opened up a loophole for the developers by connecting database tables owned by different subsystems. Native JDBC SQL was a good vehicle for doing this.
The following diagram shows an example of connecting two tables owned by two subsystems using a native JDBC SQL:
As shown ...
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