Eugene Koifman created HIVE-15044:
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Summary: LockManager may be too coarse grained
Key: HIVE-15044
URL: https://issues.apache.org/jira/browse/HIVE-15044
Project: Hive
Issue Type: Improvement
Components: Transactions
Affects Versions: 1.0.0
Reporter: Eugene Koifman
Assignee: Eugene Koifman
Consider
{noformat}
create table target (a int, b int)
partitioned by (p int, q int) clustered by (a) into 2 buckets
stored as orc TBLPROPERTIES ('transactional'='true')")
insert into target partition(p=1,q) values (1,2,3)
{noformat}
this insert will lock the whole table. See
{noformat}
DbTxnManager.acquireLocks()
switch (output.getType()) {
case DUMMYPARTITION: //
{noformat}
Insert operation runs with SHARED_READ lock but once HIVE-15032 is addressed
this will be an issue for Update/Delete/Merge which use a more restrictive
SHARED_WRITE lock.
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