Xiening Dai created CALCITE-3785:
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Summary: HepPlanner.belongToDag() doesn't have to use
mapDigestToVertex
Key: CALCITE-3785
URL: https://issues.apache.org/jira/browse/CALCITE-3785
Project: Calcite
Issue Type: Bug
Reporter: Xiening Dai
To test whether or not a vertex belongs to DAG, we can simply do
graph.vertexSet().contains(vertex); There's no need to look up in
mapDigestToVertex map, which incurs overhead of creating the map key. This
problem was amplified by CALCITE-3713.
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