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Posted to dev@phoenix.apache.org by "Josh Elser (Jira)" <ji...@apache.org> on 2020/08/10 20:01:00 UTC
[jira] [Created] (PHOENIX-6068) (5.x) Read repair reduces the
number of rows returned for LIMIT queries
Josh Elser created PHOENIX-6068:
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Summary: (5.x) Read repair reduces the number of rows returned for LIMIT queries
Key: PHOENIX-6068
URL: https://issues.apache.org/jira/browse/PHOENIX-6068
Project: Phoenix
Issue Type: Bug
Affects Versions: 5.0.0, 4.14.3
Reporter: Kadir OZDEMIR
Assignee: Kadir OZDEMIR
Fix For: 4.16.0
Phoenix uses HBase PageFilter to limit the number of rows returned by scans. If a scanned index row is unverified, GlobalIndexChecker repairs this rows. This repair operation leads to either skipping the unverified row or scanning its repaired version. Every scanned row including unverified rows are counted by the page filter. Since unverified rows are counted but not returned for the query, the actual number of rows returned for a LIMIT query becomes less than the set limit (i.e., page size) for the query.
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