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https://issues.apache.org/jira/browse/CALCITE-987?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15038219#comment-15038219
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Mike Hinchey edited comment on CALCITE-987 at 12/3/15 6:40 PM:
---------------------------------------------------------------
I moved my comment to CALCITE-1005.
was (Author: mikehinchey):
After commit 24b0747, 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);
Which I took from core/src/test/resources/sql/subquery.oq, which 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
> Push limit 0 will result in an infinite loop
> --------------------------------------------
>
> Key: CALCITE-987
> URL: https://issues.apache.org/jira/browse/CALCITE-987
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.5.0
> Reporter: Pengcheng Xiong
> Assignee: Pengcheng Xiong
> Fix For: 1.6.0
>
> Attachments: CALCITE-987.01.patch, CALCITE-987.02.patch,
> CALCITE-987.03.patch, CALCITE-987.04.patch
>
>
> We use "checkInputForCollationAndLimit" in RelMdUtil.java to check the input
> #rows. However, it calls RelMetadataQuery.getRowCount which will validate the
> #rows. The validation will change #row=0 to #row=1. This will result in an
> infinite loop to push limit. The affected rules include
> SortUnionTransposeRule and any Sort***TransposeRules that call
> checkInputForCollationAndLimit.
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