How to Call Custom Database Functions Using Hibernate?

Calling Custom Database Functions with Hibernate

This question focuses on invoking custom database functions from within Hibernate, particularly in the context of a SQL statement. The question arises from the ability to define custom functions in a database (such as Postgres) and then reference them in SQL queries. The main issue is how to call such custom functions using Hibernate.

To answer this question, the solution suggests defining the custom function within the appropriate Hibernate Dialect. The author references the source code for the PostgreSQLDialect class as an example, pointing out the numerous registerFunction() calls it contains. To achieve the desired functionality, you need to add a new call to registerFunction() specifically for your custom function. Additionally, you must configure your Hibernate settings to utilize your custom dialect. By following these instructions, you can call custom database functions from within your Hibernate applications.

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