CODEWITHSUNDEEP
jpa
user2130951
user2130951

Reputation: 2741

Is it possible to drop-create some table with JPA

You can in the persistance.xml set tables to be dropped and recreated on startup. Is it possible to be more selective having some tables stay populated and others recreated?

Upvotes: 0

Views: 2421

Answers (1)

wypieprz
wypieprz

Reputation: 8229

Fortunately such feature (and even more) is supported starting from JPA 2.1 by using the following set of properties:

<property name="javax.persistence.schema-generation.database.action" 
value="drop-and-create"/>
<property name="javax.persistence.schema-generation.create-source" 
value="script"/>
<property name="javax.persistence.schema-generation.drop-source" 
value="script"/>
<property name="javax.persistence.schema-generation.drop-script-source" 
value="META-INF/drop-script.sql"/>
<property name="javax.persistence.schema-generation.create-script-source" 
value="META-INF/create-script.sql"/>
<property name="javax.persistence.sql-load-script-source" 
value="META-INF/load-script.sql"/>

In the above example javax.persistence.schema-generation.drop-source informs provider to use scripts for creating, deleting or loading the database schema specified in the corresponding property values:

  • drop-script.sql: DROP TABLE ... statements
  • create-script.sql: CREATE TABLE ... statements
  • load-script.sql: INSERT INTO ... statements

I hope it helps.

Upvotes: 1

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