Applying the DSTv25 update for the Oracle Database
(Doc ID 2069652.1)
Last updated on JANUARY 09, 2020
Oracle Database - Enterprise Edition - Version 10.1.0.5 to 220.127.116.11 [Release 10.1 to 12.1] Oracle Database - Standard Edition - Version 10.1.0.5 to 18.104.22.168 [Release 10.1 to 12.1] Oracle Database Cloud Schema Service - Version N/A and later Oracle Database Exadata Express Cloud Service - Version N/A and later Oracle Database Exadata Cloud Machine - Version N/A and later Information in this document applies to any platform.
To see if you NEED DSTv25 for the 2015 Turkish change please see <note 2066351.1> - The Turkish Government postpone the "switch to DST for 2015" for 2 weeks - Impact on Oracle RDBMS
NO Proactive backports of the RDBMS DSTv25 <patch 22037014> are done. All supported versions can be requested . Please log a SR if you need a backport to a platform or current version not released yet.
NO Proactive backports of the OJVM DSTv25 <patch 22037067> are done. All supported versions can be requested . Please log a SR if you need a backport . Note that the OJVM DST patch is platform generic.
There are no "PSU DST patches" , for example an Oracle DST patch for 22.214.171.124 can be applied using Opatch on *any* 126.96.36.199 psu (same goes for any other Oracle RDBMS version)
Note that backports to versions who are NOT in Premier Support are possible / available for download only for customers with a valid Extended Support . Exceptions for other version/platform combination are only possible for customers with an existing Extended Support contract for the specific version/platform combination or platforms with Extended Support Fee Waiver Period. Please log a SR if you need a backport to such an platform / version (if you need several log 1 sr clearly stating which version/platforms you have Extended Support contract for and need ). See <Note 412160.1> , section "G) For what versions are DST patches provided / there is no DST version X for my Oracle RDBMS version?" Please consult your Sales representative to enroll in an Extended Support contract if required. If you log a SR requesting a backport or the password for versions in Extended Support and there is no Extended Support contract in place the patch cannot be provided.
The RDBMS DSTv25 update includes the timezone information from the IANA ( http://www.iana.org/time-zones ) data tzdata2015g.tar and contains all previous Oracle RDBMS DST updates.
An complete overview of timezone updates is found in <Note 412160.1> Updated DST Transitions and New Time Zones in Oracle RDBMS and OJVM Time Zone File Patches.
Compared to DSTv24 this is the list of updated timezones in DSTv25 for non historical dates ( meaning update to the timezone after 1970):
This note will give an overview on what checks to perform before applying the DSTv25 update. Note that all DST patches are always cumulative, which means they contain also ALL the previous DST changes / corrections.
Please note that SYSDATE is NOT affected by "Oracle DST patches" seen SYSDATE is purely depending on the OS to get the time. So even an "unpatched database" will return a correct SYSDATE if the server (OS) time is correct. For "sysdate" you do not need any DST patch <note 1627439.1> How to diagnose wrong time ( SYSDATE and SYSTIMESTAMP) after DST change , server reboot , database restart or installation when connecting to a database on an Unix server For more information about Timestamp with (local) Time Zone please check <Note 340512.1> Timestamps & time zones - Frequently Asked Questions
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