Maksim Zhuravkov created IGNITE-21559:
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Summary: 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
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.
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