[JBoss JIRA] Created: (TEIID-747) Minor costing updates
by Steven Hawkins (JIRA)
Minor costing updates
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Key: TEIID-747
URL: https://jira.jboss.org/jira/browse/TEIID-747
Project: Teiid
Issue Type: Quality Risk
Components: Query Engine
Affects Versions: 6.0.0
Reporter: Steven Hawkins
Assignee: Steven Hawkins
Priority: Minor
Fix For: 6.2.0
Virtual cost stats for ndv and nnv should be used if available
nnv and ndv should be able to be …
[View More]calculated against projected expressions
External use of useskey should check for intervening joins/unions
The like cost check for just % should be moved to the rewriter
Except/Intersect costing should be based upon average case
This will be about as far as the current logic can be used, see TEIID-239 for using better estimates of ndv and nnv
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14 years, 11 months