Syed Shameerur Rahman created HIVE-22957:
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Summary: Support For FilterExp In MSCK Command
Key: HIVE-22957
URL: https://issues.apache.org/jira/browse/HIVE-22957
Project: Hive
Issue Type: Improvement
Reporter: Syed Shameerur Rahman
Assignee: Syed Shameerur Rahman
Fix For: 4.0.0
Currently MSCK command supports full repair of table (all partitions) or some
subset of partitions based on partitionSpec. The aim of this jira is to
introduce a filterExp (=, !=, <, >, >=, <=, LIKE) in MSCK command so that a
larger subset of partitions can be recovered (added/deleted) without firing a
full repair might take time if the no. of partitions are huge.
*Approach*:
The initial approach is to add a where clause in MSCK command Eg: MCK REPAIR
TABLE <tbl_name> ADD|DROP|SYNC PARTITIONS WHERE <pcol1> <filter_operator>
<value> AND ....
*Flow:*
1) Parse the where clause and generate filterExpression
2) fetch all the partitions from the metastore which matches the filter
expression
3) fetch all the partition file from the filesystem
4) remove all the partition path which does not match with the filter expression
5) Based on ADD | DROP | SYNC do the remaining steps.
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