[JBoss JIRA] (TEIID-3466) Selectivity is over estimated in joins with multiple predicates.
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[
https://issues.jboss.org/browse/TEIID-3466?page=com.atlassian.jira.plugin...
]
Steven Hawkins resolved TEIID-3466.
-----------------------------------
Resolution: Done
Updated the costing logic to effectively ignore optional criteria and changed the cost
estimate for and predicates using an average of high and low. However this means that the
estimate is not quite consistent as it can be slightly different based upon the order of
the criteria, or can be different if computed as individual nodes rather than a conjunct.
Selectivity is over estimated in joins with multiple predicates.
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Key: TEIID-3466
URL: https://issues.jboss.org/browse/TEIID-3466
Project: Teiid
Issue Type: Quality Risk
Components: Query Engine
Affects Versions: 8.0
Reporter: Steven Hawkins
Assignee: Steven Hawkins
Fix For: 8.11
Selectivity is over estimated in joins with multiple predicates. This is partial due to
optional predicates discovered during copy criteria and partially due to always using the
independent estimate of selectivity.
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Steven Hawkins (JIRA)