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Posted to issues@ignite.apache.org by "Maksim Zhuravkov (Jira)" <ji...@apache.org> on 2024/02/19 11:11:00 UTC
[jira] [Updated] (IGNITE-21559) Sql. Implement expression traversal that checks whether expression is determinist
[ https://issues.apache.org/jira/browse/IGNITE-21559?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
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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