Will Berkeley created KUDU-2567:
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Summary: Cull rowsets for open-ended queries
Key: KUDU-2567
URL: https://issues.apache.org/jira/browse/KUDU-2567
Project: Kudu
Issue Type: Improvement
Components: tablet
Affects Versions: 1.7.1
Reporter: Will Berkeley
The rowset tree only supports culling rowsets when there's both a PK upper
bound and a PK lower bound. So, for example, on a tablet partitioned by arrival
time, doing a query for all rows that arrived since yesterday involves creating
iterators for every rowset, instead of only the rowsets that satisfy the
primary key bound. Normally, this isn't such a big deal such the scan will
immediately see from the key index that the rowset doesn't have any results,
but in some cases (like if due to KUDU-1400 there are a lot of small rowsets),
the time spent opening extra rowsets can make the initial scan request take a
long time.
It should be fairly straightforward to enhance the rowset tree to handle
intervals open on either end.
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