GitHub user adrian-ionescu opened a pull request:
https://github.com/apache/spark/pull/17510
[SPARK-20194] Add support for partition pruning to in-memory catalog
## What changes were proposed in this pull request?
This patch implements `listPartitionsByFilter()` for `InMemoryCatalog` and
thus resolves an outstanding TODO causing the `PruneFileSourcePartitions`
optimizer rule not to apply when "spark.sql.catalogImplementation" is set to
"in-memory" (which is the default).
The change is straightforward: it extracts the code for further filtering
of the list of partitions returned by the metastore's `getPartitionsByFilter()`
out from `HiveExternalCatalog` into `ExternalCatalogUtils` and calls this new
function from `InMemoryCatalog` on the whole list of partitions.
Now that this method is implemented we can always pass the `CatalogTable`
to the `DataSource` in `FindDataSourceTable`, so that the latter is resolved to
a relation with a `CatalogFileIndex`, which is what the
`PruneFileSourcePartitions` rule matches for.
## How was this patch tested?
Ran existing tests and added new test for `listPartitionsByFilter` in
`ExternalCatalogSuite`, which is subclassed by both `InMemoryCatalogSuite` and
`HiveExternalCatalogSuite`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/adrian-ionescu/apache-spark InMemoryCatalog
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/17510.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #17510
----
commit 3b031c75ba35324242993e8742961d23ce087445
Author: Adrian Ionescu <adr...@databricks.com>
Date: 2017-04-02T13:01:41Z
Implement listPartitionsByFilter() for InMemoryCatalog
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