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https://issues.apache.org/jira/browse/CALCITE-3436?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde updated CALCITE-3436:
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Summary: In CalciteConnectionConfigImpl, add "isSet" and "unset" methods
(was: CalciteConnectionConfigImpl.set obliterates previous property values)
> In CalciteConnectionConfigImpl, add "isSet" and "unset" methods
> ---------------------------------------------------------------
>
> Key: CALCITE-3436
> URL: https://issues.apache.org/jira/browse/CALCITE-3436
> Project: Calcite
> Issue Type: Bug
> Reporter: Ryan Fu
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 50m
> Remaining Estimate: 0h
>
> The cause is that `new Properties(properties)` doesn't copy the previous
> value as, say, `new HashMap(map)` does.
>
> * Add a unit test in PlannerTest, that if you call set(x, 1) then set(y, 2)
> on a CalciteConnectionConfigImpl, the result contains x and y.
> * Consider potentially using `clone()` as Properties implements Cloneable
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