Ivan Daschinsky created CALCITE-4742:
----------------------------------------
Summary: AssertionError in SubQueryRemoveRule.rewriteSome while
rewriting ANY subquery
Key: CALCITE-4742
URL: https://issues.apache.org/jira/browse/CALCITE-4742
Project: Calcite
Issue Type: Bug
Reporter: Ivan Daschinsky
When executing
{code}
select * from "scott".emp where empno <> any (select 10);
{code}
with assertions, got assertion error
{code}
---
> java.lang.AssertionError
> at
> org.apache.calcite.rel.rules.SubQueryRemoveRule.rewriteSome(SubQueryRemoveRule.java:170)
> at
> org.apache.calcite.rel.rules.SubQueryRemoveRule.apply(SubQueryRemoveRule.java:92)
> at
> org.apache.calcite.rel.rules.SubQueryRemoveRule.matchFilter(SubQueryRemoveRule.java:637)
> at
> org.apache.calcite.rel.rules.SubQueryRemoveRule.access$100(SubQueryRemoveRule.java:71)
> at
> org.apache.calcite.rel.rules.SubQueryRemoveRule$Config.lambda$static$3(SubQueryRemoveRule.java:701)
> at
> org.apache.calcite.rel.rules.SubQueryRemoveRule.onMatch(SubQueryRemoveRule.java:82)
> at
> org.apache.calcite.plan.AbstractRelOptPlanner.fireRule(AbstractRelOptPlanner.java:341)
> at org.apache.calcite.plan.hep.HepPlanner.applyRule(HepPlanner.java:565)
> at
> org.apache.calcite.plan.hep.HepPlanner.applyRules(HepPlanner.java:428)
> at
> org.apache.calcite.plan.hep.HepPlanner.executeInstruction(HepPlanner.java:282)
> at
> org.apache.calcite.plan.hep.HepInstruction$RuleCollection.execute(HepInstruction.java:77)
> at
> org.apache.calcite.plan.hep.HepPlanner.executeProgram(HepPlanner.java:208)
> at
> org.apache.calcite.plan.hep.HepPlanner.findBestExp(HepPlanner.java:195)
> at org.apache.calcite.tools.Programs.lambda$of$0(Programs.java:176)
> at
> org.apache.calcite.tools.Programs$SequenceProgram.run(Programs.java:335)
> at org.apache.calcite.prepare.Prepare.optimize(Prepare.java:172)
> at org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:306)
> at org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:215)
> at
> org.apache.calcite.prepare.CalcitePrepareImpl.prepare2_(CalcitePrepareImpl.java:647)
> at
> org.apache.calcite.prepare.CalcitePrepareImpl.prepare_(CalcitePrepareImpl.java:513)
> at
> org.apache.calcite.prepare.CalcitePrepareImpl.prepareSql(CalcitePrepareImpl.java:483)
> at
> org.apache.calcite.jdbc.CalciteConnectionImpl.parseQuery(CalciteConnectionImpl.java:249)
> at
> org.apache.calcite.jdbc.CalciteMetaImpl.prepareAndExecute(CalciteMetaImpl.java:623)
{code}
This query cannot be rewritten as IN query, so it goes to
`SubQueryRemoveRule.rewriteSome`. Current logic in this method doesn't work on
this case and produce wrong plan.
This query should be rewritten to something like this:
{code}
select distinct(e.*) from "scott".emp as e left join
(select 10 as deptno) as q
on e.deptno <> q.deptno;
{code}
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