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https://issues.apache.org/jira/browse/FLINK-9713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16614743#comment-16614743
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ASF GitHub Bot commented on FLINK-9713:
---------------------------------------

twalthr commented on a change in pull request #6299: [FLINK-9713][table][sql] 
Support processing time versioned joins
URL: https://github.com/apache/flink/pull/6299#discussion_r217365862
 
 

 ##########
 File path: 
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/api/BatchTableEnvironment.scala
 ##########
 @@ -448,48 +448,13 @@ abstract class BatchTableEnvironment(
     * @return The optimized [[RelNode]] tree
     */
   private[flink] def optimize(relNode: RelNode): RelNode = {
-
-    // 0. convert sub-queries before query decorrelation
-    val convSubQueryPlan = runHepPlanner(
-      HepMatchOrder.BOTTOM_UP, FlinkRuleSets.TABLE_SUBQUERY_RULES, relNode, 
relNode.getTraitSet)
-
-    // 0. convert table references
-    val fullRelNode = runHepPlanner(
-      HepMatchOrder.BOTTOM_UP,
-      FlinkRuleSets.TABLE_REF_RULES,
-      convSubQueryPlan,
-      relNode.getTraitSet)
-
-    // 1. decorrelate
+    val convSubQueryPlan = optimizeConvertSubQueries(relNode)
 
 Review comment:
   This again adds a lot of public methods to the table environments in Java. 
Can we move the entire optimize method and sub-methods to a 
`TableEnvironmentUtils` class?

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> Support versioned joins in planning phase
> -----------------------------------------
>
>                 Key: FLINK-9713
>                 URL: https://issues.apache.org/jira/browse/FLINK-9713
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table API & SQL
>    Affects Versions: 1.5.0
>            Reporter: Piotr Nowojski
>            Assignee: Piotr Nowojski
>            Priority: Major
>              Labels: pull-request-available
>
> Queries like:
> {code:java}
> SELECT 
>   o.amount * r.rate 
> FROM 
>   Orders AS o, 
>   LATERAL TABLE (Rates(o.rowtime)) AS r 
> WHERE o.currency = r.currency{code}
> should evaluate to valid plan with versioned joins plan node.



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