Import.sql hibernate java1/17/2024 ![]() ![]() INSERT INTO Product (product_id, product_name) VALUES ( NULL, 'product_4') INSERT INTO Product (product_id, product_name) VALUES ( NULL, 'product_3') INSERT INTO Product (product_id, product_name) VALUES ( NULL, 'product_2') INSERT INTO User (user_id, user_name, email) VALUES( NULL, 'user1', INTO User (user_id, user_name, email) VALUES( NULL, 'user2', INTO User (user_id, user_name, email) VALUES( NULL, 'user3', INTO User (user_id, user_name, email) VALUES( NULL, 'user4', INTO User (user_id, user_name, email) VALUES( NULL, 'user5', INTO User (user_id, user_name, email) VALUES( NULL, 'user7', INTO Product (product_id, product_name) VALUES ( NULL, 'product_1') All we need to do is place the file import.sql in the indicated folder, and voilá.Every time we run our application, Hibernate will take care of creating the tables and executing the SQL script.Īn example import.sql file, could be something like, 1 In line _17_ we have the magic property -load-script-source that will load and execute the SQL script file. (in the above example we have indicated that class User and Product of the package dbExperiment are entity classes) This ensures that the tables will be created exactly as defined in our entities anotations. ![]() This means, that when our application starts, it will scan the entity classes defined in the file and will create the correspondent tables in our database, actually dropping them if they previously existed. In line _16_ we set the value of Data definition Language (DDL) to Create. This is handy in early stages, as it is blazing fast and supports a wide range of SQL standard features, but what really matter for the purpose of this post are the properties defined in lines _16_ and _17_. We are using hsqldb configured as an in-memory database. Let’s look at an example of the Persistence.xml 1 ![]() This is also where we should place a reference to all our entity classes. Usually this refers to /src/main/resources/META-INF/persistence.xml This is where we define all the configurations so that Hibernate (or any other JPA compliant ORM) knows which database it should work with, username, password, etc. Persistence.xml is a standard JPA configuration file, and it has to be included in the META-INF folder of the jar where our entities classes live. All we need to do is properly set-up our persistence.xml file. It comes up, that if we are using the Hibernate ORM framework, a very handy feature is included, that will automatically run a SQL Script every time we run our app. There are several utilities out there to assist us on the task as datafactory, but some times they don’t fit our exact needs, as not generating data in our language or forcing us to include code in our application tests (to be deleted later), that we do not want to. Knowing exactly what to expect from our database queries, simplifies our life. In early stages of a project, it is very common to have the need to produce tests against a consistent set of data. ![]()
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