[jira] [Created] (IMPALA-7141) Extract interfaces for partition pruning prior to fetching partitions

["Todd Lipcon (JIRA)" <ji...@apache.org>]

Todd Lipcon created IMPALA-7141:
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             Summary: Extract interfaces for partition pruning prior to fetching partitions
                 Key: IMPALA-7141
                 URL: https://issues.apache.org/jira/browse/IMPALA-7141
             Project: IMPALA
          Issue Type: Sub-task
            Reporter: Todd Lipcon


In the LocalCatalog, we want to only fetch the partitions that are referenced by a query -- i.e. we must prune partitions based only on the partition names and not the entire partition objects. However, the PartitionPruner implementation currently expect to be able to fetch the full map of HdfsPartition objects from the table and work on them as is.

This JIRA is to do some refactorings such that the PartitionPruner interacts with a slightly more restricted interface that only exposes the minimal interaction points with the table and the partition map. Once it has computed a list of remaining partitions, it can then instruct the table to fully load them to yield the resulting full Partition objects.



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