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https://issues.apache.org/jira/browse/HIVE-18857?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vineet Garg updated HIVE-18857:
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Status: Open (was: Patch Available)
> Store default value text instead of default value expression in metastore
> -------------------------------------------------------------------------
>
> Key: HIVE-18857
> URL: https://issues.apache.org/jira/browse/HIVE-18857
> Project: Hive
> Issue Type: Improvement
> Components: SQL
> Reporter: Vineet Garg
> Assignee: Vineet Garg
> Priority: Major
> Fix For: 3.0.0
>
> Attachments: HIVE-18857.1.patch, HIVE-18857.2.patch
>
>
> Currently for default value an expression is generated and serialized to
> store in metastore. It should be improved to rather serialize the default
> value itself instead of expression and store that in metastore. This will
> have the following benefits:
> * It will make metastore schema upgrade safe. e.g. if a UDF function name is
> changed hive wouldn't be able to parse back the expression for this UDF which
> was serialized in earlier version.
> * It will make metastore schema for default constraint hive agnostic. Other
> databases would be able to use the value as it is.
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