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Posted to dev@calcite.apache.org by "Feng Zhu (JIRA)" <ji...@apache.org> on 2019/06/06 06:52:00 UTC
[jira] [Created] (CALCITE-3113) Equivalent MutableAggregates with
different row types fail with AssertionError
Feng Zhu created CALCITE-3113:
---------------------------------
Summary: Equivalent MutableAggregates with different row types fail with AssertionError
Key: CALCITE-3113
URL: https://issues.apache.org/jira/browse/CALCITE-3113
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.19.0
Reporter: Feng Zhu
Add test case in MaterializationTest:
{code:java}
@Test public void testAggregateAlias() {
checkMaterialize(
"select count(*) as c from \"emps\" group by \"empid\"",
"select count(*) + 1 as c from \"emps\" group by \"empid\"");
}
{code}
It fails due to different rowtype.
{code:java}
java.lang.AssertionError
at org.apache.calcite.plan.SubstitutionVisitor.go(SubstitutionVisitor.java:504)
at org.apache.calcite.plan.SubstitutionVisitor.go(SubstitutionVisitor.java:465)
at org.apache.calcite.plan.MaterializedViewSubstitutionVisitor.go(MaterializedViewSubstitutionVisitor.java:56)
at org.apache.calcite.plan.RelOptMaterializations.substitute(RelOptMaterializations.java:200)
at org.apache.calcite.plan.RelOptMaterializations.useMaterializedViews(RelOptMaterializations.java:72)
at org.apache.calcite.plan.volcano.VolcanoPlanner.registerMaterializations(VolcanoPlanner.java:347)
{code}
However, according to MutableAggregate's hashCode&equals implementation, this materialization can be reused, i.e., queryDescedant=targetDescendant.
{code:java}
queryDescendant: RecordType(JavaType(int) empid, BIGINT $f1)
=============================================================================
Aggregate(groupSet: {0}, groupSets: [{0}], calls: [COUNT()])
Project(projects: [$0])
Scan(table: [hr, emps])
targetDescendant: RecordType(JavaType(int) empid, BIGINT C)
=============================================================================
Aggregate(groupSet: {0}, groupSets: [{0}], calls: [COUNT()])
Project(projects: [$0])
Scan(table: [hr, emps])
{code}
So, how can we align them?
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