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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:
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Status: Patch Available (was: In Progress)
> 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
>
> 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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