[teiid-issues] [JBoss JIRA] Updated: (TEIID-1498) Incorrect rewrite of not disjunctive criteria
Steven Hawkins (JIRA)
jira-events at lists.jboss.org
Mon Mar 7 20:38:45 EST 2011
[ https://issues.jboss.org/browse/TEIID-1498?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Steven Hawkins updated TEIID-1498:
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Workaround Description: Use the conjunctive normal form of the condition, e.g. instead of "not((a or b) AND c)", use "(not(a) or not(c)) and (not(b) or not(c))" (was: Use the disjunctive normal form of the condition, e.g. instead of "not((a or b) AND c)", use "(not(a) or not(c)) and (not(b) or not(c))")
> Incorrect rewrite of not disjunctive criteria
> ----------------------------------------------
>
> Key: TEIID-1498
> URL: https://issues.jboss.org/browse/TEIID-1498
> Project: Teiid
> Issue Type: Bug
> Components: Query Engine
> Affects Versions: 7.0
> Reporter: Steven Hawkins
> Assignee: Steven Hawkins
> Priority: Critical
> Fix For: 7.4
>
>
> The rewrite of a condition such as "not((a or b) AND c)" with a,b,c predicates where c a is predicate that is negatable, such as col1 = 1. The result should have the negated form of col1 <> 1, but instead has col1 = 1. This is because the col1 = 1 predicate is repeated in the result, but not cloned and the rewriter modifies the same instance.
>
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