Adam Kennedy created CALCITE-5647:
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Summary: Metadata methods evade mq.getRowCount and directly call
rel.estimateRowCount
Key: CALCITE-5647
URL: https://issues.apache.org/jira/browse/CALCITE-5647
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.34.0
Reporter: Adam Kennedy
A few locations in Calcite call rel.estimateRowCount(mq) when they should
instead call mq.getRowCount(red).
We detected this because we implemented row count estimation entirely within an
alternative handle instead of RelMdRowCount, and then override estimateRowCount
to ensure the custom handler is user, by throwing an unreachable code exception.
A few places in Calcite trigger these unreachable exceptions because they do
not use mq.getRowCount.
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