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Posted to dev@drill.apache.org by "Aman Sinha (JIRA)" <ji...@apache.org> on 2015/02/27 01:26:04 UTC
[jira] [Created] (DRILL-2327) Upper bound on join's
row_count_estimate_factor should be increased to handle expanding joins
Aman Sinha created DRILL-2327:
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Summary: Upper bound on join's row_count_estimate_factor should be increased to handle expanding joins
Key: DRILL-2327
URL: https://issues.apache.org/jira/browse/DRILL-2327
Project: Apache Drill
Issue Type: Improvement
Components: Query Planning & Optimization
Reporter: Aman Sinha
Assignee: Aman Sinha
The current bounds for planner.join.row_count_estimate_factor is between 0 to 100. The default value is 1.0. This parameter determines the estimated output cardinality of a join. For hugely expanding joins, this is inadequate and we need to allow substantially larger upper bound.
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