[
https://issues.apache.org/jira/browse/CALCITE-2865?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Stamatis Zampetakis resolved CALCITE-2865.
------------------------------------------
Resolution: Fixed
Fix Version/s: 1.20.0
Fixed in
[89829252689477bfeb305071285edcde1b4a3048|https://github.com/apache/calcite/commit/89829252689477bfeb305071285edcde1b4a3048].
Thanks for the PR [~rubenql]!
> FilterProjectTransposeRule generates wrong traitSet when copyFilter/Project
> is true
> -----------------------------------------------------------------------------------
>
> Key: CALCITE-2865
> URL: https://issues.apache.org/jira/browse/CALCITE-2865
> Project: Calcite
> Issue Type: Bug
> Affects Versions: 1.18.0
> Reporter: Ruben Quesada Lopez
> Assignee: Ruben Quesada Lopez
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.20.0
>
> Time Spent: 2h 40m
> Remaining Estimate: 0h
>
> Problem can be reproduced with the following steps:
> As suggested by [~zabetak], a possibility to reproduce this issue is with the
> following test in RelOptRulesTest:
> {code:java}
> /** Test case for
> * <a
> href="https://issues.apache.org/jira/browse/CALCITE-2865";>[CALCITE-2865]
> * FilterProjectTransposeRule generates wrong traitSet when
> copyFilter/Project is true</a>. */
> @Test public void testFilterProjectTransposeRule() {
> List<RelOptRule> rules = Arrays.asList(
> FilterProjectTransposeRule.INSTANCE, // default values:
> copyFilter=true, copyProject=true
> new FilterProjectTransposeRule(Filter.class, Project.class,
> /*copyFilter*/ false, /*copyProject*/ false, RelFactories.LOGICAL_BUILDER));
> List<RelNode> results = new ArrayList<>(2);
> for (RelOptRule rule : rules) {
> RelBuilder b = RelBuilder.create(RelBuilderTest.config().build());
> RelNode in = b
> .scan("EMP")
> .sort(-4) // salary desc
> .project(b.field(3)) // salary
> .filter(b.equals(b.field(0), b.literal(11500))) // salary =
> 11500
> .build();
> HepProgram program = new HepProgramBuilder()
> .addRuleInstance(rule)
> .build();
> HepPlanner hepPlanner = new HepPlanner(program);
> hepPlanner.setRoot(in);
> results.add(hepPlanner.findBestExp());
> }
> // compare LogicalFilter traitSet
> assertEquals(results.get(0).getInput(0).getTraitSet(),
> results.get(1).getInput(0).getTraitSet());
> }
> {code}
> Which fails with the following message:
> {code:java}
> java.lang.AssertionError:
> Expected :NONE.[0 DESC]
> Actual :NONE.[3 DESC]
> {code}
> If we run the test with a break point at the end of
> {{FilterProjectTransposeRule#onMatch}} method, we can see that, when the
> project and filter are transposed, the generated output (newFilterRel) is
> different in terms of traitSet, depending if the copyFilter / copyProject
> flags are used or not:
> - copyFilter and copyProject TRUE (default)
> {code:java}
> LogicalProject.NONE.[0 DESC]
> LogicalFilter.NONE.[0 DESC] // !!!
> LogicalSort.NONE.[3 DESC]
> {code}
> - copyFilter and copyProject FALSE
> {code:java}
> LogicalProject.NONE.[0 DESC]
> LogicalFilter.NONE.[3 DESC] // !!!
> LogicalSort.NONE.[3 DESC]
> {code}
> As I see it, the default behavior (copyFilter/Project true) seems wrong in
> terms of new filter's traitSet.
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