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https://issues.apache.org/jira/browse/HIVE-2842?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13224226#comment-13224226
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ransom.hezhiqiang commented on HIVE-2842:
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SELECT a.t FROM t a;
add alias to table will be success.
table t alias is also t,so we must rename it or disable it when validate.
> Table with column that shares name fails upon query
> ---------------------------------------------------
>
> Key: HIVE-2842
> URL: https://issues.apache.org/jira/browse/HIVE-2842
> Project: Hive
> Issue Type: Bug
> Reporter: Kevin Wilfong
>
> CREATE TABLE t (t STRING);
> SELECT t FROM t;
> This will result in
> FAILED: Error in semantic analysis: Line 1:7 Ambiguous table alias or column
> reference 't'
> Similarly
> SELECT t2 FROM t t2;
> will result in the same exception
> SELECT t from t t2;
> will succeed.
> MySQL apparently supports this, so Hive should as well.
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