[jira] [Created] (CALCITE-2690) Uses ·getDescription· instead of ·toString· when gets RelNode's digest
godfrey he created CALCITE-2690:
Summary: Uses ·getDescription· instead of ·toString· when gets RelNode's digest
Issue Type: Improvement
Reporter: godfrey he
Assignee: Julian Hyde
Currently, We use a lot of RelNode's toString method to get digest. However the semantics of `toString` method is ambiguity. If some developers do not know the toString value of a RelNode will be used as digest and override toString method arbitrarily, the optimization result will be unexpected. So I suggest that we should use ·getDescription· instead of ·toString· to get RelNode's digest in Calcite.
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