Make "alter table drop partition" more efficient
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Key: HIVE-2219
URL: https://issues.apache.org/jira/browse/HIVE-2219
Project: Hive
Issue Type: Improvement
Components: Query Processor
Reporter: Sohan Jain
The current function dropTable() that handles dropping multiple partitions is
somewhat inefficient. For each partition you want to drop, it loops through
each partition in the table to see if the partition exists. This is an _O(mn)_
operation, where _m_ is the number of partitions to drop, and _n_ is the number
of partitions in the table. The running time of this function can be improved,
which is useful for tables with many partitions.
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