# Extending JdbcDatabaseSnapshot 3.5.2

**URL:** <https://forum.liquibase.org/t/extending-jdbcdatabasesnapshot-3-5-2/3934>\
**Category:** Liquibase Development\
**Created:** [November 4, 2016, 12:12am UTC](https://forum.liquibase.org/t/extending-jdbcdatabasesnapshot-3-5-2/3934 "2016-11-04T00:12:00Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![IvanMartoccia](https://avatars.discourse-cdn.com/v4/letter/i/57b2e6/32.png) [@IvanMartoccia](https://forum.liquibase.org/u/IvanMartoccia)\
**Post date:** [November 4, 2016, 12:12am UTC](https://forum.liquibase.org/t/extending-jdbcdatabasesnapshot-3-5-2/3934/1 "2016-11-04T00:12:00Z")

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I am writing an extension for Ingres 9. The class liquibase.snapshot.JdbcDatabaseSnapshot includes some database specific code in method getUniqueConstraints (createSql). Is there a way to extend this class to replace this method?

Thanks!