Grails Goodness: Using Groovy SQL

In a previous post we learned how we can use Hibernate native SQL queries in our Grails application. We can also execute custom SQL with Groovy SQL. We must create a new instance of groovy.sql.Sql in our code to execute SQL code. The easiest way is to use a javax.sql.DataSource as a constructor argument for the groovy.sql.Sql class. In a Grails application context we already have a DataSource and we can use it to inject it into our code. We must use the name dataSource to reference the default datasource in a Grails application.

In the following sample we invoke a custom query (for Firebird) using Groovy SQL. Notice we define a property dataSource in the Grails service PersonService and Grails will automatically inject a DataSource instance.

We can even make the groovy.sql.Sql instance a Spring bean in our Grails application. Then we can inject the Sql instance in for example a Grails service. In grails-app/conf/spring/resources.groovy we define the Sql bean:

Now we can rewrite our previous sample and use the bean groovySql:

Code written with Grails 2.3.7.

Original article

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About mrhaki

My name is Hubert A. Klein Ikkink also known as mrhaki. I work at the great IT company JDriven. Here I work on projects with Groovy & Grails, Gradle and Spring. At JDriven we focus on SpringSource technologies. All colleagues want to learn new technologies, support craftmanship and are very eager to learn. This is truly a great environment to work in. You can contact me via Google+ or @mrhaki.

One thought on “Grails Goodness: Using Groovy SQL

  1. This is one of the most relevant articles that would solve issues on grails with regards to reporting in grails applications.

    Simple and straight to the point, beautiful, really thanks a lot.

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