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https://issues.apache.org/jira/browse/CALCITE-4425?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated CALCITE-4425:
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Labels: pull-request-available (was: )
> Class DefaultEdge lacks a proper toString implementation
> --------------------------------------------------------
>
> Key: CALCITE-4425
> URL: https://issues.apache.org/jira/browse/CALCITE-4425
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Liya Fan
> Assignee: Liya Fan
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> It is convenient to build a graph as an object of {{DefaultDirectedGraph}}.
> The class has a good {{toString}} implementation, which greatly helps
> examining the structure of the graph.
> However, the output of the method may be confusing. In our system, the
> {{toString}} method produces the following result:
> graph(vertices: [0, 1, 2, 3, 4, 5, 6], edges:
> [org.apache.calcite.util.graph.DefaultEdge@1a550334,
> org.apache.calcite.util.graph.DefaultEdge@891ce8a1,
> org.apache.calcite.util.graph.DefaultEdge@ba5c5190,
> org.apache.calcite.util.graph.DefaultEdge@c894f6b3,
> org.apache.calcite.util.graph.DefaultEdge@d72993fe,
> org.apache.calcite.util.graph.DefaultEdge@da030cc4,
> org.apache.calcite.util.graph.DefaultEdge@de17986f,
> org.apache.calcite.util.graph.DefaultEdge@e20be355,
> org.apache.calcite.util.graph.DefaultEdge@ef7b8a83,
> org.apache.calcite.util.graph.DefaultEdge@f2b672ef,
> org.apache.calcite.util.graph.DefaultEdge@f547e446])
> The reason is that the default edge type is {{DefaultEdge}}, and the
> {{DefaultEdge}} class does not have a proper {{toString}} implementation. So
> we want to provide one, so that it helps investigating the internals of the
> graph.
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