[jira] [Updated] (CALCITE-4742) Implement "<> SOME" sub-query

["Julian Hyde (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-4742?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Julian Hyde updated CALCITE-4742:
---------------------------------
    Summary: Implement "<> SOME" sub-query  (was: Implement "SOME <>" sub-query)

> Implement "<> SOME" sub-query
> -----------------------------
>
>                 Key: CALCITE-4742
>                 URL: https://issues.apache.org/jira/browse/CALCITE-4742
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>            Reporter: Ivan Daschinsky
>            Assignee: Julian Hyde
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.28.0
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> 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 inner join (select 10 as empno) as q on e.empno <> q.empno;
> {code}



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