[jira] [Commented] (FLINK-14200) Temporal Table Function Joins do not work on Tables (only TableSources) on the query side

["Benoît Paris (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-14200?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16950839#comment-16950839 ] 

Benoît Paris commented on FLINK-14200:
--------------------------------------

[As mentioned in the mailing-list|http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/flink-sql-table-in-subquery-join-temporal-table-raise-java-lang-NullPointerException-td30494.html] by another user, the following syntax fails as well:
{code:java}
SELECT o_amount * r_amount AS amount
FROM (SELECT * FROM Orders) as Orders, LATERAL TABLE (Rates(o_proctime))
WHERE r_currency = o_currency
{code}

> Temporal Table Function Joins do not work on Tables (only TableSources) on the query side
> -----------------------------------------------------------------------------------------
>
>                 Key: FLINK-14200
>                 URL: https://issues.apache.org/jira/browse/FLINK-14200
>             Project: Flink
>          Issue Type: Bug
>          Components: Table SQL / Planner
>    Affects Versions: 1.9.0
>         Environment: Java 8, Scala 2.11, Flink 1.9
>            Reporter: Benoît Paris
>            Priority: Major
>             Fix For: 1.9.2
>
>         Attachments: temporal-table-function-query-side-as-not-table-source.zip
>
>
> This only affects the Blink planner. The legacy planner works fine.
> With Orders as a TableSource, and Orders2 as a Table with the same content:
> {code:java}
> tEnv.registerTableSource("Orders", new FooSource(new String[] {"o_currency", "o_amount", "o_proctime"}));
> Table orders2 = tEnv.sqlQuery("SELECT * FROM Orders");
> tEnv.registerTable("Orders2", orders2);{code}
> This works (TableSource on the query side):
> {code:java}
> SELECT 
>  o_amount * r_amount AS amount 
> FROM Orders  
>  , LATERAL TABLE (Rates(o_proctime)) 
> WHERE r_currency = o_currency{code}
> While this does not (Table on the query side):
> {code:java}
> SELECT 
>  o_amount * r_amount AS amount 
> FROM Orders2 
>  , LATERAL TABLE (Rates(o_proctime)) 
> WHERE r_currency = o_currency{code}
> Throwing an NPE in FlinkRelBuilder, called from LogicalCorrelateToJoinFromTemporalTableFunctionRule. Attached is Java code for reproduction, along with the full log and stacktrace, and a pom.xml.
> EDIT: This may not be Table vs TableSource, maybe more a projection or a decorrelate issue? Don't know how the planner works well enough to characterize it better.
>  



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