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https://issues.apache.org/jira/browse/IGNITE-21559?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Maksim Zhuravkov updated IGNITE-21559:
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Description:
Let's implement a utility for determining whether an expression tree (RexNodes)
is deterministic or not.
Expression is deterministic if it is constant expression, dynamic parameter, or
a function like CURRENT_TIMESTAMP is evaluated once per session, or
deterministic function.
Non deterministic functions in AI-3: GEN_RANDOM_UUID.
Check to see if there are any other non-deterministic functions as well and
mark them accordingly.
was:
Let's implement a utility for determining whether an expression tree (RexNodes)
is deterministic or not.
Expression is deterministic if is a constant expression, a math function, or a
function like CURRENT_TIMESTAMP is evaluated once per session.
Non deterministic functions in AI-3: GEN_RANDOM_UUID.
Check to see if there are any other non-deterministic functions as well and
mark them accordingly.
> Sql. Implement expression traversal that checks whether expression is
> determinist
> ---------------------------------------------------------------------------------
>
> Key: IGNITE-21559
> URL: https://issues.apache.org/jira/browse/IGNITE-21559
> Project: Ignite
> Issue Type: Improvement
> Components: sql
> Affects Versions: 3.0.0-beta2
> Reporter: Maksim Zhuravkov
> Priority: Major
>
> Let's implement a utility for determining whether an expression tree
> (RexNodes) is deterministic or not.
> Expression is deterministic if it is constant expression, dynamic parameter,
> or a function like CURRENT_TIMESTAMP is evaluated once per session, or
> deterministic function.
> Non deterministic functions in AI-3: GEN_RANDOM_UUID.
> Check to see if there are any other non-deterministic functions as well and
> mark them accordingly.
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