[teiid-issues] [JBoss JIRA] Resolved: (TEIID-38) supported non-deterministic functions are evaluated prior to push-down
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https://jira.jboss.org/jira/browse/TEIID-38?page=com.atlassian.jira.plugi...
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Steven Hawkins resolved TEIID-38.
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Resolution: Won't Fix
Our approach to non-deterministic functions is not common among vendors. Preventing
further push-down seems to be the wrong thing to do. We should simply live for now with
the possibility that a non-deterministic push down may not yield the same result had it
not been pushed down.
supported non-deterministic functions are evaluated prior to
push-down
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Key: TEIID-38
URL: https://jira.jboss.org/jira/browse/TEIID-38
Project: Teiid
Issue Type: Bug
Components: Query Engine
Affects Versions: 6.x
Reporter: Steven Hawkins
Priority: Optional
Fix For: 6.1.0
Defect Tracker #24735: We currently will not actually push down non-deterministic
functions even if they are supported, since the evaluateexpressionvisitor will replace
them with constant values. For example rand will be pre-evaluated before being sent to
sqlserver (however sqlserver does not correctly support non-deterministic functions
anyway). We may need to actually not support non-deterministic functions in sqlserver or
other sources that do not handle them properly.
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