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metadata column support #13975

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chenkovsky opened this issue Jan 2, 2025 · 1 comment · May be fixed by #14057
Open

metadata column support #13975

chenkovsky opened this issue Jan 2, 2025 · 1 comment · May be fixed by #14057
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enhancement New feature or request

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@chenkovsky
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Is your feature request related to a problem or challenge?

spark support metadata column

https://spark.apache.org/docs/3.4.3/api/java/org/apache/spark/sql/connector/catalog/SupportsMetadataColumns.html

then we can treat rowid as metadata column.

Describe the solution you'd like

add metadata column in TableProvider trait

Describe alternatives you've considered

No response

Additional context

No response
@chenkovsky chenkovsky added the enhancement New feature or request label Jan 2, 2025
@nishikinocurtis
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+1, also encountering cases where parsing and executing queries referring to rowid is required.

Both logical planning and physical planning (related to scan()s) would also need enhancement to 1. parse queries refer to metadata columns and 2. if necessary produce corresponding execution plan to pull metadata out.

I'd be interested in contributing this feature if more detailed discussion regarding these surrounding implementation is made.

@chenkovsky chenkovsky linked a pull request Jan 9, 2025 that will close this issue
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feat: metadata columns chenkovsky/datafusion
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@chenkovsky @nishikinocurtis