LeoWangLZ created CALCITE-2116:
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Summary: The digests are not same for the common sub-expressions
in HepPlanner
Key: CALCITE-2116
URL: https://issues.apache.org/jira/browse/CALCITE-2116
Project: Calcite
Issue Type: Bug
Affects Versions: 1.15.0
Reporter: LeoWangLZ
Assignee: Julian Hyde
The digests are not same for the same sub-query.
like query
{code:java}
select * from (select * from dept union all select * from dept)a;
{code}
When run the query, The union relNode has two inputs, and it's same expectly
and it's the same object instead of the print of plan, but Now they are not
same.
And for Test testReplaceCommonSubexpression, the rule is only firing once, but
now it's two.
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