[SPARK-30363][SQL][DOC]Add Documentation for refresh resources. #27023
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ok to test |
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Test build #115856 has finished for PR 27023 at commit
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srowen
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Dec 27, 2019
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| ### Description | ||
| `REFRESH` is used to invalidate and refresh all the cached data (and the associated metadata) for | ||
| all Dataset, that contains the given data source path. Path matching is by prefix, i.e. "/" would |
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| ### Examples | ||
| {% highlight sql %} | ||
| REFRESH /tmp/test.jar; |
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Pardon, I just don't know the semantics well, but how does refreshing a JAR file relate to invalidating data associated with a Dataset?
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Probably, we need more concrete examples, e.g. define a table, cache it, then refresh it by path...
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Or, add comments like REFRESH TABLE: https://github.com/apache/spark/blob/master/docs/sql-ref-syntax-aux-refresh-table.md
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Test build #115958 has finished for PR 27023 at commit
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srowen
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Dec 30, 2019
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Looks reasonable. I guess there's not much to say here.
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What changes were proposed in this pull request?
Documentation added for refresh resources command in spark-sql.
Why are the changes needed?
Previously, only refresh table command was documented.
Does this PR introduce any user-facing change?
Yes. Now users can access documentation for refresh resources command.
How was this patch tested?
Manually.