Applying the DSTv20 update for the Oracle Database
(Doc ID 1552819.1)
Last updated on APRIL 06, 2022
Applies to:
Oracle Database - Standard Edition - Version 10.1.0.5 to 12.1.0.1 [Release 10.1 to 12.1] Oracle Database - Enterprise Edition - Version 10.1.0.5 to 12.1.0.1 [Release 10.1 to 12.1] Information in this document applies to any platform.
Bug 16799735 - DST 20: HALF YEARLY DST PATCHES, JUN 2013
Bug 16799766 - DST CHANGES FOR DSTV20 (TZDATA2013C) - NEED OJVM FIX
Purpose
Proactive backports of the RDBMS DSTv20 <patch 16799735> is done to Linux X86, Linux X86-64 , Microsoft Windows X86 (32-BIT), Microsoft Windows X86-64 (64-BIT), Oracle Solaris on Sparc (64-BIT), Oracle Solaris on Intel X86-64 (64-BIT), HP-UX Itanium (64-BIT), HP-UX PA-RISC (64-BIT), IBM AIX on Power Systems (64-BIT) for 11.2.0.3, 11.2.0.2 , 11.1.0.7, 10.2.0.5 and also for 10.2.0.5 on HP OpenVMs on Itanium.
Please log a SR if you need a backport to a platform or current version not mentioned. Note that backports to 11.1.0.7 and 10.2.0.5 are available for download only for customers with a valid Extended Support or for platforms with a free Extended Support extension. See <Note 412160.1> , section "G) For what versions are DST patches provided / there is no DST version X for my Oracle RDBMS version?"
Proactive backports of the OJVM DSTv20 <patch 16799766> is done for 11.2.0.3 , 11.1.0.7, 10.2.0.5. The OJVM DST patch is platform generic.
The RDBMS DSTv20 update includes the timezone information from the IANA ( http://www.iana.org/time-zones ) data tzdata2013c.tar and contains all previous Oracle RDBMS DST updates. The OJVM DSTv20 update includes the timezone information from the IANA (http://www.iana.org/time-zones ) data tzdata2013c.tar and contains all previous Oracle OJVM DST updates.
This is archived content. The note covers the "DSTv20" update, newer DST updates are available. Please see <Note 412160.1> Updated Time Zones in Oracle Time Zone File patches for information on the newer DST patches.
All DST patches are always cumulative, which means they contain also ALL the previous DST changes / corrections. This means that:
if there is a requirement to apply DST version 20 it's a good idea to apply the latest available for your Oracle RDBMS version seen the newer DST patch this will have the same fixes and more. *
a newer DST patch for a certain RDBMS version can be used if the older DST patch is not available for this version (for example using DSTv22 instead of using DSTv20 for 12.1.0.1). *
any application that works correctly with DST version x will work fine with a database using a DST version higher than DST version x **
the database and client DST version does not need to be the same. If a client uses DSTv4 for example (and all used timezones by the application are correct in DSTv4) then there is no problem using this client against a database using a higher DST version.
in 11.1.0.7 and lower Optach will report a conflict when applying a new DST patch when an older is already installed, this can be ignored. There is no need to ask for a "merge" seen the newer dst patch has already all the fixes of the old one.
There are no "PSU DST patches" , for example an Oracle DST patch for 11.2.0.4 can be applied (manually or using Opatch) on *any* 11.2.0.4 psu (same goes for any other Oracle RDBMS version)
* When doing an Oracle RDBMS version upgrade there might be a requirement to apply an exact DST patch/version on the new Oracle RDBMS version home , check the notes in point C.1.a) and C.1.b) of <Note 412160.1> Updated DST transitions and new Time Zones in Oracle Time Zone File patches. ** This statement is true for DSTv4 and higher. The only exception are very old DST versions like 1, 2 or 3 and timezones are actually used (!) in the application.
In 11gR2 and higher the time to update to a new RDBMS DST version is depending 99% on the dataset size, not the target DST version. For example if the current RDBMS DST version 14 then going from DSTv14 to DSTv22 will take the roughly the same amount of time as going from DSTv14 to DSTv20 .
Compared to DSTv19 this is the list of updated timezones in DSTv20 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 DSTv20 update.
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 227334.1> Dates & Calendars - Frequently Asked Questions For more information about Timestamp with (local) Time Zone please check <Note 340512.1> Timestamps & time zones - Frequently Asked Questions
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