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https://issues.apache.org/jira/browse/CALCITE-3357?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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jin xing updated CALCITE-3357:
------------------------------
Description:
In current code of *RelSet#addAbstractConverters*, null checking of
*curRelTrait* happens after clause of assert *curRelTrait.getTraitDef() ==
traitDef*;
It makes more sense to adjust the order;
In my understanding, this issue was not found previously for two reasons:
# AbstractConverter is not enabled by default
([https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/adapter/enumerable/EnumerableConvention.java#L65])
# It rarely happens that two algebra expression operators have identical
semantics but different *RelTraitDef*****
I found this issue when working on
https://issues.apache.org/jira/browse/CALCITE-2970
was:
In current code of *RelSet#addAbstractConverters*, null checking of
*curRelTrait* happens after clause of assert *curRelTrait.getTraitDef() ==
traitDef*;
It makes more sense to adjust the order;
In my understanding, this issue was not found previously for two reasons:
# AbstractConverter is not enabled by default
([https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/adapter/enumerable/EnumerableConvention.java#L65])
# It rarely happens that two algebra expression operators have identical
semantics but different *RelTraitDef*
> Trivial null checking in RelSet#addAbstractConverters
> -----------------------------------------------------
>
> Key: CALCITE-3357
> URL: https://issues.apache.org/jira/browse/CALCITE-3357
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: jin xing
> Priority: Minor
>
> In current code of *RelSet#addAbstractConverters*, null checking of
> *curRelTrait* happens after clause of assert *curRelTrait.getTraitDef() ==
> traitDef*;
> It makes more sense to adjust the order;
> In my understanding, this issue was not found previously for two reasons:
> # AbstractConverter is not enabled by default
> ([https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/adapter/enumerable/EnumerableConvention.java#L65])
> # It rarely happens that two algebra expression operators have identical
> semantics but different *RelTraitDef*****
> I found this issue when working on
> https://issues.apache.org/jira/browse/CALCITE-2970
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