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Julian Hyde edited comment on CALCITE-2720 at 12/4/18 12:44 AM: ---------------------------------------------------------------- Fixed in [5ebf458f|http://git-wip-us.apache.org/repos/asf/calcite/commit/5ebf458f]; thanks for the PR, [~kgyrtkirk]! was (Author: julianhyde): Fixed in [7f8556e6|http://git-wip-us.apache.org/repos/asf/calcite/commit/7f8556e6]; thanks for the PR, [~kgyrtkirk]! > Presence of an empty aggregation should not lead to Exceptions > -------------------------------------------------------------- > > Key: CALCITE-2720 > URL: https://issues.apache.org/jira/browse/CALCITE-2720 > Project: Calcite > Issue Type: Bug > Reporter: Zoltan Haindrich > Assignee: Zoltan Haindrich > Priority: Major > Fix For: 1.18.0 > > > After some transformations if an "empty" aggregation is present; > {{LoptOptimizeJoinRule}} may bump into an array index violation. > Original query is complicated; but this small {{RelMetadataTest}} testcase > reproduces the root cause. > {code} > @Test public void testEmptyAggregateNotCausesException() throws Exception { > final FrameworkConfig config = RelBuilderTest.config().build(); > final RelBuilder builder = RelBuilder.create(config); > RelMetadataQuery mq = RelMetadataQuery.instance(); > RelNode agg = builder > .scan("EMP") > .aggregate(builder.groupKey(), Collections.<AggCall> > emptyList()).build(); > mq.getTableOrigin(agg); > } > {code} > Exception is: > {code} > java.lang.IndexOutOfBoundsException: index (0) must be less than size (0) > 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.RegularImmutableList.get(RegularImmutableList.java:67) > at > org.apache.calcite.rel.metadata.RelMdColumnOrigins.getColumnOrigins(RelMdColumnOrigins.java:77) > at GeneratedMetadataHandler_ColumnOrigin.getColumnOrigins_$(Unknown > Source) > at GeneratedMetadataHandler_ColumnOrigin.getColumnOrigins(Unknown > Source) > at > org.apache.calcite.rel.metadata.RelMetadataQuery.getColumnOrigins(RelMetadataQuery.java:345) > at > org.apache.calcite.rel.metadata.RelMetadataQuery.getTableOrigin(RelMetadataQuery.java:418) > at > org.apache.calcite.test.RelMetadataTest.testEmptyAggregateNotCausesException(RelMetadataTest.java:2396) > {code} -- This message was sent by Atlassian JIRA (v7.6.3#76005)