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https://issues.apache.org/jira/browse/HIVE-31?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12760775#action_12760775
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Ning Zhang commented on HIVE-31:
--------------------------------
Chatted with Prasad offline. The decision to move the task of
DDLSemanticAnalyzer to SemanticAnalyzer is to have a single SemanticAnalyzer
instance for the whole CTAS statement (otherwise, a SemanticsAnalyzer is needed
for the SELECT part to get the resulting schema, and a DDLSemanticAnalyzer for
the CREATE TABLE part). With one instance of SA, all info is shared and don't
need to pass around.
Another issue Prasad raised is that the DDLWork is chained as the root task,
and that should be moved to the end of the task chain. I will change that in
the next revision.
> Hive: support CREATE TABLE xxx SELECT yyy.* FROM yyy
> ----------------------------------------------------
>
> Key: HIVE-31
> URL: https://issues.apache.org/jira/browse/HIVE-31
> Project: Hadoop Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Zheng Shao
> Assignee: Ning Zhang
> Attachments: HIVE-31.patch
>
>
> We should allow users to create a table using query result, without
> specifying the column names and column types.
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