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https://issues.apache.org/jira/browse/HIVE-3236?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Keegan Mosley updated HIVE-3236:
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Attachment: HIVE-3236.1.patch.txt
> allow column names to be prefixed by table alias in select all queries
> ----------------------------------------------------------------------
>
> Key: HIVE-3236
> URL: https://issues.apache.org/jira/browse/HIVE-3236
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Affects Versions: 0.10.0, 0.9.1
> Reporter: Keegan Mosley
> Priority: Minor
> Fix For: 0.10.0
>
> Attachments: HIVE-3236.1.patch.txt
>
>
> When using "CREATE TABLE x AS SELECT ..." where the select joins tables with
> hundreds of columns it is not a simple task to resolve duplicate column name
> exceptions (particularly with self-joins). The user must either manually
> specify aliases for all duplicate columns (potentially hundreds) or write a
> script to generate the data set in a separate select query, then create the
> table and load the data in.
> There should be some conf flag that would allow queries like
> "create table joined as select one.*, two.* from mytable one join mytable two
> on (one.duplicate_field = two.duplicate_field1);"
> to create a table with columns one_duplicate_field and two_duplicate_field.
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