kumarUjjawal opened a new pull request, #22695:
URL: https://github.com/apache/datafusion/pull/22695
## Which issue does this PR close?
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Part of #16303.
## Rationale for this change
`CREATE EXTERNAL TABLE` can reference only one location today. This adds
support for listing multiple explicit locations and reading them as one table.
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## What changes are included in this PR?
- Adds `LOCATION ('a.parquet', 'b.parquet')` syntax.
- Keeps `LOCATION 'a,b.parquet'` as a single path, so literal commas still
work.
- Carries multiple locations through the logical plan and proto.
- Updates listing table creation to scan all listed locations.
- Requires all listed locations to use the same object store and matching
fields.
- Keeps stream tables limited to exactly one location.
- Updates docs and upgrade notes.
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## Are these changes tested?
Yes
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## Are there any user-facing changes?
Yes. `CREATE EXTERNAL TABLE` now accepts a parenthesized list of locations.
There is also a public API change: `CreateExternalTable.location` is
replaced by `CreateExternalTable.locations`.
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