Yesheng Ma created SPARK-28237:
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Summary: Add a new batch strategy called Idempotent to catch
potential bugs in corresponding rules
Key: SPARK-28237
URL: https://issues.apache.org/jira/browse/SPARK-28237
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.0.0
Reporter: Yesheng Ma
The current {{RuleExecutor}} system contains two kinds of strategies: {{Once}}
and {{FixedPoint}}. The {{Once}} strategy is supposed to run once. However, for
particular rules (e.g. PullOutNondeterministic), they are designed to be
idempotent, but Spark currently lacks corresponding mechanism to prevent such
kind of non-idempotent behavior from happening.
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