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It displays the status of the database components in the upgraded database and the time required to complete each component upgrade.Any errors that occur during the upgrade are listed with each component and must be addressed If the script reports any invalid objects, run $ORACLE_HOME/rdbms/admin/(multiple times) to validate the invalid objects in the database, until there is no change in the number of invalid objects.
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While a manual upgrade gives us finer control over the upgrade process, it is more susceptible to error if any of the upgrade or pre-upgrade steps are either not followed or are performed out of order.
Below are the steps The issues indicated by this script should be resolved before a manual upgrade is attempted.
The changes may affect existing data of TIMESTAMP WITH TIME ZONE datatype.
To preserve this TIMESTAMP data for updating according to the new time zone transition rules, we must run the utltzuv2script on the database before upgrading.