[jira] [Created] (HIVE-24422) Throw SemanticException when CTE alias is conflicted with table name

[Zhihua Deng (Jira)]

Zhihua Deng created HIVE-24422:
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             Summary: Throw SemanticException when CTE alias is conflicted with 
table name
                 Key: HIVE-24422
                 URL: https://issues.apache.org/jira/browse/HIVE-24422
             Project: Hive
          Issue Type: Improvement
          Components: Parser
            Reporter: Zhihua Deng


If the alias of CTE is conflicted with the table name, we use the alias 
fetching the table other than replacing it with the ASTNode tree, this may 
cause some confusing problems. For example:

{noformat}
create table game_info (game_name string);

with game_info as (
select distinct ext_id, dev_app_id, game_name
from game_info_extend )
select count(game_name) from game_info;{noformat}
The query will return the number of rows of the table game_info, instead of the 
game_info_extend. Maybe we should better throw an exception to avoid such cases.
 



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