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Posted to issues@calcite.apache.org by "Julian Hyde (Jira)" <ji...@apache.org> on 2019/08/23 22:43:02 UTC
[jira] [Commented] (CALCITE-3286) In LatticeSuggester, allow join
conditions that use expressions
[ https://issues.apache.org/jira/browse/CALCITE-3286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16914692#comment-16914692 ]
Julian Hyde commented on CALCITE-3286:
--------------------------------------
Work in progress: https://github.com/julianhyde/calcite/tree/3286-join-on-expressions
> In LatticeSuggester, allow join conditions that use expressions
> ---------------------------------------------------------------
>
> Key: CALCITE-3286
> URL: https://issues.apache.org/jira/browse/CALCITE-3286
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Priority: Major
>
> In {{LatticeSuggester}}, allow join conditions that use expressions. For example, the query
> {code}
> select *
> from emp
> join dept on emp.deptno + 1 = dept.deptno
> {code}
> uses an expression "emp.deptno + 1" on the "emp" side of the join key.
> Currently this query throws:
> {noformat}
> java.lang.ClassCastException: class org.apache.calcite.materialize.LatticeSuggester$DerivedColRef cannot be cast to class org.apache.calcite.materialize.LatticeSuggester$BaseColRef
> at org.apache.calcite.materialize.LatticeSuggester.frame(LatticeSuggester.java:478)
> at org.apache.calcite.materialize.LatticeSuggester.frame(LatticeSuggester.java:420)
> at org.apache.calcite.materialize.LatticeSuggester.frame(LatticeSuggester.java:399)
> at org.apache.calcite.materialize.LatticeSuggester.addQuery(LatticeSuggester.java:124)
> {noformat}
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