Christian Beikov ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiOGMyNTdhZDhj... ) / Improvement ( https://hibernate.atlassian.net/browse/HHH-16317?atlOrigin=eyJpIjoiOGMyNT... ) HHH-16317 ( https://hibernate.atlassian.net/browse/HHH-16317?atlOrigin=eyJpIjoiOGMyNT... ) Add StandardBasicTypes.INSTANT_WITHOUT_TIMEZONE ( https://hibernate.atlassian.net/browse/HHH-16317?atlOrigin=eyJpIjoiOGMyNT... ) Issue Type: Improvement Assignee: Christian Beikov ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) Components: hibernate-core Created: 15/Mar/2023 10:45 AM Priority: Major Reporter: Christian Beikov ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) This is useful when one wants to bind a timestamp parameter to an Instant , which might fail on PostgreSQL, because right now, we use InstantAsTimestampWithTimeZoneJdbcType for that dialect, which binds OffsetDateTime through the JDBC driver. It has yet to be confirmed if this is a bug or not, but pgjdbc shifts OffsetDateTime to the JVM TZ when binding to a timestamp column. If this is correct JDBC behavior, we might as well drop the InstantAsTimestampWithTimeZoneJdbcType and use InstantAsTimestampJdbcType instead for PostgreSQL. NB: InstantAsTimestampJdbcType uses a shared calendar for passing UTC as time zone. Maybe we need to copy that to be safe, but we could switch between a copying and shared implementation based on what we know about the drivers. ( https://hibernate.atlassian.net/browse/HHH-16317#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16317#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100217- sha1:fd7c927 )