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https://issues.apache.org/jira/browse/HIVE-18416?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jesus Camacho Rodriguez updated HIVE-18416:
-------------------------------------------
    Attachment: HIVE-18416.01.patch

> Initial support for TABLE function
> ----------------------------------
>
>                 Key: HIVE-18416
>                 URL: https://issues.apache.org/jira/browse/HIVE-18416
>             Project: Hive
>          Issue Type: Bug
>          Components: Parser
>    Affects Versions: 3.0.0
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>              Labels: TODOC3.0
>         Attachments: HIVE-18416.01.patch, HIVE-18416.patch
>
>
> Include support for TABLE function derived table. In SQL standard, it is 
> defined as:
> {noformat}
> <table function derived table> ::=
>   TABLE <left paren> <collection value expression> <right paren>
> {noformat}
> Further, include limited support for its usage as LATERAL derived table.
> This will allow Hive to execute queries such as:
> {code}
> SELECT tf.col1, tf.col2, tf.col3
> FROM
>   TABLE(VALUES('A', 10, 30.0),('B', 20, 30.0)) AS tf(col1, col2, col3);
> SELECT tf.col1, tf.col2, tf.col3
> FROM
>   (SELECT key, value FROM src) t,
>   LATERAL TABLE(VALUES('A', 10, t.key),('B', 20, t.key)) AS tf(col1, col2, 
> col3);
> {code}
> The idea is to rely on AST rewriting for such cases, as TABLE can be 
> implemented using {{inline}} UDTF with an {{array}} of {{structs}} 
> representing the rows in the {{VALUES}} clause.



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