Chunwei Lei created CALCITE-3791:
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Summary: HepPlanner does't clear metadata cache for the ancestors
of discarded node when a transformation happens
Key: CALCITE-3791
URL: https://issues.apache.org/jira/browse/CALCITE-3791
Project: Calcite
Issue Type: Bug
Components: core
Reporter: Chunwei Lei
Assignee: Chunwei Lei
In HepPlanner, when a transformation happens, it will clear metadata cache for
the parent of the discarded node[1]. But it doesn't clear the metadata cache
for the ancestors of the parent. For example, assume we get a logical plan like
A
\
B
\
C
, if we clear the metadata cache for C after applying a rule, we should also
clear the metadata cache for A and B since metadata of A and B derive from C.
[1][https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/plan/hep/HepPlanner.java#L877]
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