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https://issues.apache.org/jira/browse/SPARK-59685?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-59685:
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Labels: pull-request-available (was: )
> Preserve built-in ownership in the canonical SQL of clause-free SQL/JSON
> functions
> ----------------------------------------------------------------------------------
>
> Key: SPARK-59685
> URL: https://issues.apache.org/jira/browse/SPARK-59685
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 4.4.0
> Reporter: Ganesha S
> Priority: Major
> Labels: pull-request-available
>
> AstBuilder routes a clause-free JSON function call through function
> resolution so a same-named routine on the SQL PATH can shadow it
> (SPARK-59144). But these built-ins' canonical Expression.sql drops
> default-valued clauses, so a call that is the built-in only because of a
> default clause renders clause-free SQL:
> {code:java}
> JSON_VALUE(j, p RETURNING STRING) -- built-in (clause present)
> .sql ==> JSON_VALUE(j, p) -- clause-free: routes on reparse{code}
> Reparsed under a shadowing PATH (or a stored view's frozen PATH), that
> rendering binds the routine instead of the built-in, silently changing the
> result and possibly the schema.
> Fix: when a rendering would otherwise be clause-free, emit the default clause
> (RETURNING STRING, or FALSE ON ERROR for JSON_EXISTS) so canonical SQL
> reparses back to the built-in. Auto-generated column names render the clean
> form via `usePrettyExpression`, so the round-trip-only clause never leaks
> into display names.
> Deferred from SPARK-59144 review (thread on AstBuilder.scala:4210).
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