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https://issues.apache.org/jira/browse/SPARK-59994?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yang Jie updated SPARK-59994:
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Description:
Whether a command evaluates its own expressions or only stores them (as
metadata or source predicates) is decided by special-casing CreateVariable in
two places: CheckAnalysis allows nondeterministic expressions only in
CreateVariable among commands, and RewriteWithExpression (SPARK-59962) inlines
common-expression definitions in every command except CreateVariable. A command
from an extension, or a new one, that evaluates its expressions gets neither
treatment and nothing points its author to these checks.
Make this a property of the command (for example a method on Command or a
marker trait) that both rules read.
Raised in https://github.com/apache/spark/pull/59217#discussion_r4187715516
> Let a command declare that it evaluates its expressions, instead of
> special-casing CreateVariable
> -------------------------------------------------------------------------------------------------
>
> Key: SPARK-59994
> URL: https://issues.apache.org/jira/browse/SPARK-59994
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 5.0.0
> Reporter: Yang Jie
> Priority: Major
>
> Whether a command evaluates its own expressions or only stores them (as
> metadata or source predicates) is decided by special-casing CreateVariable in
> two places: CheckAnalysis allows nondeterministic expressions only in
> CreateVariable among commands, and RewriteWithExpression (SPARK-59962)
> inlines common-expression definitions in every command except CreateVariable.
> A command from an extension, or a new one, that evaluates its expressions
> gets neither treatment and nothing points its author to these checks.
> Make this a property of the command (for example a method on Command or a
> marker trait) that both rules read.
> Raised in https://github.com/apache/spark/pull/59217#discussion_r4187715516
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