[teiid-issues] [JBoss JIRA] Resolved: (TEIID-747) Minor costing updates

Minor costing updates --------------------- 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