Pavel Gubin created CALCITE-1980:
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Summary: java.lang.IndexOutOfBoundsException when building
aggregate on top of project
Key: CALCITE-1980
URL: https://issues.apache.org/jira/browse/CALCITE-1980
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.14.0
Reporter: Pavel Gubin
Assignee: Julian Hyde
The following test in RelBuilderTest:
{code:java}
@Test public void testAggregateProjectWithAliases() {
final RelBuilder builder = RelBuilder.create(config().build());
RelNode root =
builder.scan("EMP")
.project(builder.field("DEPTNO"))
.aggregate(builder.groupKey(builder.alias(builder.field("DEPTNO"),
"departmentNo")))
.build();
final String expected = ""
+ "LogicalAggregate(group=[{1}])\n" +
" LogicalProject(DEPTNO=[$0], departmentNo=[$0])\n" +
" LogicalProject(DEPTNO=[$7])\n" +
" LogicalTableScan(table=[[scott, EMP]])\n";
assertThat(str(root), is(expected));
}
{code}
throws the following exception:
{noformat}
java.lang.IndexOutOfBoundsException: index (1) must be less than size (1)
at
com.google.common.base.Preconditions.checkElementIndex(Preconditions.java:310)
at
com.google.common.base.Preconditions.checkElementIndex(Preconditions.java:293)
at
com.google.common.collect.SingletonImmutableList.get(SingletonImmutableList.java:41)
at
org.apache.calcite.rel.metadata.RelMdColumnUniqueness.areColumnsUnique(RelMdColumnUniqueness.java:206)
at GeneratedMetadataHandler_ColumnUniqueness.areColumnsUnique_$(Unknown
Source)
at GeneratedMetadataHandler_ColumnUniqueness.areColumnsUnique(Unknown
Source)
at
org.apache.calcite.rel.metadata.RelMetadataQuery.areColumnsUnique(RelMetadataQuery.java:542)
at
org.apache.calcite.rel.metadata.RelMetadataQuery.areColumnsUnique(RelMetadataQuery.java:522)
at org.apache.calcite.tools.RelBuilder.aggregate(RelBuilder.java:1067)
at org.apache.calcite.tools.RelBuilder.aggregate(RelBuilder.java:1046)
at
org.apache.calcite.test.RelBuilderTest.testAggregateProjectWithAliases(RelBuilderTest.java:668)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
{noformat}
It is caused by the fact RelBuilder can check uniqueness on non-existing
columns if groupKey in aggregate contains something more elaborate than a
reference to the column in the underlying node. In this case it's an column
alias but can also be some expression.
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