Laurent Goujon created CALCITE-2471:
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Summary: RelNode description includes all tree when recomputed
Key: CALCITE-2471
URL: https://issues.apache.org/jira/browse/CALCITE-2471
Project: Calcite
Issue Type: Bug
Components: core
Reporter: Laurent Goujon
Assignee: Julian Hyde
The initial AbstractRelNode description is `{{typeName#id}}` but when
recomputed, it includes all its inputs (and other attributes).
When creating the final plan, HepPlanner visits each node bottom up, and
recomputes the node digest. This causes node description to grow in size, up to
the top node which contains basically a string copy of the whole tree. On large
trees, this may consume a non-significant amount of memory.
See email thread:
https://lists.apache.org/thread.html/5e71c9f2b4e83865805841708f53471cfab1b5de673e6f162b68edc9@%3Cdev.calcite.apache.org%3E
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