# Oracle12cDialect missing when upgrading from 6.3.2 to 6.4.0

**URL:** <https://discourse.hibernate.org/t/oracle12cdialect-missing-when-upgrading-from-6-3-2-to-6-4-0/8687>\
**Category:** Hibernate ORM\
**Created:** [December 11, 2023, 4:08pm UTC](https://discourse.hibernate.org/t/oracle12cdialect-missing-when-upgrading-from-6-3-2-to-6-4-0/8687 "2023-12-11T16:08:57Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![barbet](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.hibernate.org/barbet/32/2860_2.png) [@barbet](https://discourse.hibernate.org/u/barbet)\
**Post date:** [December 11, 2023, 4:08pm UTC](https://discourse.hibernate.org/t/oracle12cdialect-missing-when-upgrading-from-6-3-2-to-6-4-0/8687/1 "2023-12-11T16:08:58Z")

</div>

Hi,

When I upgraded to 6.4.0 I get this exception that the Oracle12cDialect is missing. I don’t understand, i have set the dialect like:  
driver-class-name: oracle.jdbc.OracleDriver  
hibernate.dialect org.hibernate.dialect.OracleDialect

Also the database is oracle 19. Nowhere in the project there is something like oracle12c.

What could be the cause?

---

<div class="post-metadata">

**Author:** ![beikov](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.hibernate.org/beikov/32/258_2.png) [@beikov](https://discourse.hibernate.org/u/beikov)\
**Post date:** [December 11, 2023, 4:57pm UTC](https://discourse.hibernate.org/t/oracle12cdialect-missing-when-upgrading-from-6-3-2-to-6-4-0/8687/2 "2023-12-11T16:57:28Z")

</div>

Maybe some of your dependencies are messing with the dialect.