Haisheng Yuan created CALCITE-3676:
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Summary: VolcanoPlanner. dumpGraphviz should handle exception
gracefully
Key: CALCITE-3676
URL: https://issues.apache.org/jira/browse/CALCITE-3676
Project: Calcite
Issue Type: Bug
Components: core
Reporter: Haisheng Yuan
In case VolcanoPlanner can't generate plan due to some RelSubset doesn't have
best rel, it will dump the sets and Graphviz. Since there is error during
planning, we want to see the sets in the exception message, but when dumping
Graphviz, it might encounter another exception (we can't guarantee all the sets
and subsets are correctly generated for Graphviz), causing failure to dump Sets
info, which is rather helpful in production system.
{code:java}
Caused by: java.lang.AssertionError
at
org.apache.calcite.util.PartiallyOrderedSet.findParentsChildren(PartiallyOrderedSet.java:318)
at
org.apache.calcite.util.PartiallyOrderedSet.findParents(PartiallyOrderedSet.java:308)
at
org.apache.calcite.util.PartiallyOrderedSet.add(PartiallyOrderedSet.java:226)
at
org.apache.calcite.plan.volcano.VolcanoPlanner.dumpGraphviz(VolcanoPlanner.java:1320)
at
org.apache.calcite.plan.volcano.VolcanoPlanner.dump(VolcanoPlanner.java:1194)
at
org.apache.calcite.plan.volcano.RelSubset$CheapestPlanReplacer.visit(RelSubset.java:606)
at
org.apache.calcite.plan.volcano.RelSubset.buildCheapestPlan(RelSubset.java:307)
at
org.apache.calcite.plan.volcano.VolcanoPlanner.findBestExp(VolcanoPlanner.java:649)
{code}
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