[jira] [Commented] (CALCITE-1005) NullPointerException in RelMdMaxRowCount

["Mike Hinchey (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-1005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15041703#comment-15041703 ] 

Mike Hinchey commented on CALCITE-1005:
---------------------------------------

I have a fix, though I couldn't reproduce within a calcite test:
https://github.com/apache/calcite/pull/173


> NullPointerException in RelMdMaxRowCount
> ----------------------------------------
>
>                 Key: CALCITE-1005
>                 URL: https://issues.apache.org/jira/browse/CALCITE-1005
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.6.0
>            Reporter: Mike Hinchey
>            Assignee: Julian Hyde
>
> After commit 24b0747 for CALCITE-987, I get an error from a test in my own project, but the test is all copied from calcite.
> The query is this:
> with
> t1(x) as (select * from  (values 1,2, case when 1 = 1 then null else 3 end)),
> t2(x) as (select * from  (values 1,case when 1 = 1 then null else 3 end))
> select *
> from t1
> where t1.x not in (select t2.x from t2);
> I took that from core/src/test/resources/sql/subquery.oq, and I'm running with the CsvSchemaFactory and TRANSLATABLE.
> Abbreviated stacktrace (most of it is reflection noise):
> 	...
> 	at org.apache.calcite.rel.metadata.RelMetadataQuery.getRowCount(RelMetadataQuery.java:86)
> 	at org.apache.calcite.plan.hep.HepPlanner.dumpGraph(HepPlanner.java:958)
> 	at org.apache.calcite.plan.hep.HepPlanner.applyTransformationResults(HepPlanner.java:723)
> 	at org.apache.calcite.plan.hep.HepPlanner.applyRule(HepPlanner.java:518)
> 	at org.apache.calcite.plan.hep.HepPlanner.applyRules(HepPlanner.java:392)
> 	at org.apache.calcite.plan.hep.HepPlanner.executeInstruction(HepPlanner.java:255)
> 	at org.apache.calcite.plan.hep.HepInstruction$RuleInstance.execute(HepInstruction.java:125)
> 	at org.apache.calcite.plan.hep.HepPlanner.executeProgram(HepPlanner.java:207)
> 	at org.apache.calcite.plan.hep.HepPlanner.findBestExp(HepPlanner.java:194)
> 	... more
> 	at org.apache.calcite.rel.metadata.RelMetadataQuery.getRowCount(RelMetadataQuery.java:86)
> 	at org.apache.calcite.rel.core.Filter.estimateFilteredRows(Filter.java:156)
> 	at org.apache.calcite.rel.core.Filter.estimateFilteredRows(Filter.java:150)
> 	at org.apache.calcite.rel.core.Calc.getRows(Calc.java:135)
> 	at org.apache.calcite.rel.metadata.RelMdRowCount.getRowCount(RelMdRowCount.java:144)
> 	... 50 more
> 	at org.apache.calcite.rel.metadata.RelMetadataQuery.getMaxRowCount(RelMetadataQuery.java:101)
> 	at org.apache.calcite.rel.metadata.RelMdUtil.getJoinRowCount(RelMdUtil.java:705)
> 	at org.apache.calcite.rel.core.Join.getRows(Join.java:175)
> 	at org.apache.calcite.rel.metadata.RelMdRowCount.getRowCount(RelMdRowCount.java:144)
> 	... 90 more
> 	at org.apache.calcite.rel.metadata.RelMetadataQuery.getMaxRowCount(RelMetadataQuery.java:101)
> 	at org.apache.calcite.rel.metadata.RelMdMaxRowCount.getMaxRowCount(RelMdMaxRowCount.java:108)
> 	... 105 more
> Caused by: java.lang.NullPointerException
> 	at org.apache.calcite.rel.metadata.RelMdMaxRowCount.getMaxRowCount(RelMdMaxRowCount.java:102)
> 	... 125 more



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