TANG Wen-hui created CALCITE-3353:
-------------------------------------
Summary: ProjectJoinTransposeRule caused AssertionError when
creating a new Join
Key: CALCITE-3353
URL: https://issues.apache.org/jira/browse/CALCITE-3353
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.20.0
Reporter: TANG Wen-hui
Assignee: TANG Wen-hui
Trying to add ProjectJoinTransposeRule to the rule set to optimize sql (using
VolcanoPlanner).
Get the following exception：
Caused by: java.lang.AssertionErrorCaused by: java.lang.AssertionError at
org.apache.calcite.adapter.enumerable.EnumerableMergeJoin.<init>(EnumerableMergeJoin.java:72)
at
org.apache.calcite.adapter.enumerable.EnumerableMergeJoin.copy(EnumerableMergeJoin.java:112)
at
org.apache.calcite.adapter.enumerable.EnumerableMergeJoin.copy(EnumerableMergeJoin.java:59)
at
org.apache.calcite.rel.rules.ProjectJoinTransposeRule.onMatch(ProjectJoinTransposeRule.java:155)
at
org.apache.calcite.plan.volcano.VolcanoRuleCall.onMatch(VolcanoRuleCall.java:208)
at
org.apache.calcite.plan.volcano.VolcanoPlanner.findBestExp(VolcanoPlanner.java:703)
at org.apache.calcite.tools.Programs.lambda$standard$7(Programs.java:466) at
org.apache.calcite.tools.Programs$SequenceProgram.run(Programs.java:528) at
org.apache.calcite.prepare.Prepare.optimize(Prepare.java:196) at
org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:416) at
org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:310) at
org.apache.calcite.prepare.CalcitePrepareImpl.prepare2_(CalcitePrepareImpl.java:830)
at
org.apache.calcite.prepare.CalcitePrepareImpl.prepare_(CalcitePrepareImpl.java:610)
at
org.apache.calcite.prepare.CalcitePrepareImpl.prepareSql(CalcitePrepareImpl.java:580)
at
org.apache.calcite.jdbc.CalciteConnectionImpl.parseQuery(CalciteConnectionImpl.java:247)
at
org.apache.calcite.jdbc.CalciteMetaImpl.prepareAndExecute(CalciteMetaImpl.java:711)
... 22 more
This is because the ProjectJoinTransposeRule can match multiple types of Join
and ProjectJoinTransposeRule creates a new Join using the join.copy() method.
When the rule applied to EnumerableMergeJoin, and the new Join created by this
rule may not meet the requirements of EnumerableMergeJoin.
{code:java}
EnumerableMergeJoin(
RelOptCluster cluster,
RelTraitSet traits,
RelNode left,
RelNode right,
RexNode condition,
Set<CorrelationId> variablesSet,
JoinRelType joinType) {
super(cluster, traits, left, right, condition, variablesSet, joinType);
final List<RelCollation> collations =
traits.getTraits(RelCollationTraitDef.INSTANCE);
assert collations == null || RelCollations.contains(collations,
joinInfo.leftKeys);
}
{code}
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