[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 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, 9 months