Keegan Mosley created HIVE-3236:
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Summary: 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
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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