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https://issues.apache.org/jira/browse/HIVE-8459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14510001#comment-14510001
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Alan Gates commented on HIVE-8459:
----------------------------------
Changed this to minor as an extra shared lock on the table makes no semantic
difference. The lock on the partition would block any xlocks on the table
anyway, and a read lock doesn't block other read locks or semi-shared locks.
> DbLockManager locking table in addition to partitions
> -----------------------------------------------------
>
> Key: HIVE-8459
> URL: https://issues.apache.org/jira/browse/HIVE-8459
> Project: Hive
> Issue Type: Bug
> Components: Locking
> Affects Versions: 0.14.0
> Reporter: Alan Gates
> Assignee: Alan Gates
> Priority: Minor
>
> Queries and operations on partitioned tables are generating locks on the
> whole table when they should only be locking the partition. For example:
> {code}
> select count(*) from concur_orc_tab_part where ds = 'today';
> {code}
> This should only be locking the partition ds='today'. But instead:
> {code}
> mysql> select * from HIVE_LOCKS;
> +----------------+----------------+----------+---------+---------------------+--------------+---------------+--------------+-------------------+----------------+---------+--------------------+
> | HL_LOCK_EXT_ID | HL_LOCK_INT_ID | HL_TXNID | HL_DB | HL_TABLE
> | HL_PARTITION | HL_LOCK_STATE | HL_LOCK_TYPE | HL_LAST_HEARTBEAT |
> HL_ACQUIRED_AT | HL_USER | HL_HOST |
> +----------------+----------------+----------+---------+---------------------+--------------+---------------+--------------+-------------------+----------------+---------+--------------------+
> | 428 | 1 | 0 | default | concur_orc_tab_part
> | NULL | a | r | 1413311172000 |
> 1413311171000 | hive | node-1.example.com |
> | 428 | 2 | 0 | default | concur_orc_tab_part
> | ds=today | a | r | 1413311172000 |
> 1413311171000 | hive | node-1.example.com |
> +----------------+----------------+----------+---------+---------------------+--------------+---------------+--------------+-------------------+----------------+---------+--------------------+
> {code}
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