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https://issues.apache.org/jira/browse/FLINK-18657?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Flink Jira Bot updated FLINK-18657:
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Labels: stale-major (was: )
> Change semantics of DESCRIBE SELECT statement
> ---------------------------------------------
>
> Key: FLINK-18657
> URL: https://issues.apache.org/jira/browse/FLINK-18657
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / API
> Affects Versions: 1.11.0
> Reporter: Fabian Hueske
> Priority: Major
> Labels: stale-major
>
> Running a {{DESCRIBE SELECT ...}} returns the same as {{EXPLAIN PLAN FOR
> SELECT ...}}, i.e., an unstructured, textual description of the execution
> plan.
> I think it would be more consistent and also more useful if {{DESCRIBE SELECT
> ...}} would display the result schema of the {{SELECT}} query, just like
> {{DESCRIBE TABLE xxx}} shows the schema of the table {{xxx}}. This would be
> useful for users who need to create a sink table to write the result schema
> of a SELECT query and figure out the schema of the query.
> This would be a breaking change, but {{DESCRIBE SELECT ...}} seems to be an
> undocumented feature (at least it is not listed on the [DESCRIBE
> docs|https://ci.apache.org/projects/flink/flink-docs-release-1.11/dev/table/sql/describe.html])
> and the original behavior would be still available via {{EXPLAIN PLAN FOR
> SELECT ...}} (which is documented).
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