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https://issues.apache.org/jira/browse/HIVE-972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12801064#action_12801064
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Zheng Shao commented on HIVE-972:
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We had a group code-review with John and here are the notes.
1. TODO: File a follow-up JIRA for the behavior for underlying table column
type change.
Currently we do store the column type of the view in the metastore but that's
not always true - we use the underlying table's column type when the view is
accessed.
2. DDL unparse: we use antlr TokenRewriteStream to rewrite the original stream
for "*" expansion.
3. Error message. Recursively expanded as the comment above mentioned.
4. TODO: We are using BLOB type in jdo. We need to test it out with mysql.
5. TODO: Metadata change: We store "view" definitions in the same metadata
table that we store "table" definitions.
Shall we add a field "table type" so we know whether it's a table, external
table, view, or materialized view in the future.
We should clean up the additional useless fields in "view" - the test output
shows that we are storing some garbage information for views.
6. TODO: Clean up thrift and define the version of thrift that we should use.
Check with Raghu and Ning.
7. We add extra "select" with internal names like "_col0" etc in the view
definition.
8. TODO: We should add a test for using views with UDTF
9. TODO: Add a test for a large view definition (in terms of the length of the
view definition).
10. isViews() should assert the other field is null
11. createViewDesc: In DDLTask, there is some code populating derivedSchema
from originalSchema. Shall we move that logic to compile time, so that we only
need to pass derivedSchema.
> support views
> -------------
>
> Key: HIVE-972
> URL: https://issues.apache.org/jira/browse/HIVE-972
> Project: Hadoop Hive
> Issue Type: New Feature
> Components: Metastore, Query Processor
> Reporter: Namit Jain
> Assignee: John Sichi
> Attachments: HIVE-972.1.patch, HIVE-972.2.patch
>
>
> Hive currently does not support views.
> It would be a very nice feature to have.
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