[teiid-issues] [JBoss JIRA] Resolved: (TEIID-239) ENHANCEMENT: Costing beyond cardinality sould be propogated
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https://issues.jboss.org/browse/TEIID-239?page=com.atlassian.jira.plugin....
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Steven Hawkins resolved TEIID-239.
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Labels: costing (was: )
Assignee: Steven Hawkins
Fix Version/s: 7.4
(was: 8.0)
Resolution: Done
Added logic to also set the column value estimates on each node. This will improve set
query and aggregate costing, but did not yet improve ndv nnv updates with joins.
ENHANCEMENT: Costing beyond cardinality sould be propogated
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Key: TEIID-239
URL: https://issues.jboss.org/browse/TEIID-239
Project: Teiid
Issue Type: Feature Request
Components: Query Engine
Affects Versions: 6.0.0
Reporter: Steven Hawkins
Assignee: Steven Hawkins
Priority: Minor
Labels: costing
Fix For: 7.4
Defect Tracker #24037: Currently values for ndv and nnv are recalculated at each plan
node based upon the value at the physical layer. This is not a good estimate. Instead,
these values should be propagated through the plan just like the cardinality and adjusted
appropriately for join, unions, etc. It may also be good to allow the use of costing
metadata on virtual layers.
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