jacques-n commented on a change in pull request #1207: [CALCITE-3062] Do not
populate provenanceMap if not debug
URL: https://github.com/apache/calcite/pull/1207#discussion_r284141859
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File path:
core/src/main/java/org/apache/calcite/plan/volcano/VolcanoPlanner.java
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@@ -276,6 +276,9 @@ public VolcanoPlanner(RelOptCostFactory costFactory, //
super(costFactory == null ? VolcanoCost.FACTORY : costFactory, //
externalContext);
this.zeroCost = this.costFactory.makeZeroCost();
+ // If LOGGER is debug enabled, enable provenance information to be captured
+ this.provenanceMap = LOGGER.isDebugEnabled() ? new HashMap<>()
+ : Util.blackholeMap();
Review comment:
Naming is very subjective. It is would be helpful if you provide an
alternative suggestion if you're unhappy with a name. What do people think
about NullMap, DevNullMap, and ForgetfulMap?
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