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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/72249/
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(Updated March 19, 2020, 12:23 p.m.)
Review request for hive, Peter Vary and Rajesh Balamohan.
Bugs: HIVE-22888
https://issues.apache.org/jira/browse/HIVE-22888
Repository: hive-git
Description
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Replaced inner select under checkLocks using multiple IN statements with JOIN
operator;
generated query looks like :
(SELECT EX.*, REQ.HL_LOCK_INT_ID AS REQ_LOCK_INT_ID FROM (
SELECT HL_LOCK_EXT_ID, HL_DB, HL_TABLE, HL_PARTITION, HL_LOCK_STATE,
HL_LOCK_TYPE FROM HIVE_LOCKS
WHERE HL_LOCK_EXT_ID < 333) EX
INNER JOIN (
SELECT HL_DB, HL_TABLE, HL_PARTITION, HL_LOCK_TYPE FROM HIVE_LOCKS WHERE
HL_LOCK_EXT_ID = 333) REQ
ON EX.HL_DB = REQ.HL_DB
AND (EX.HL_TABLE IS NULL OR REQ.HL_TABLE IS NULL OR EX.HL_TABLE =
REQ.HL_TABLE
AND (EX.HL_PARTITION IS NULL OR REQ.HL_PARTITION IS NULL OR EX.HL_PARTITION
= REQ.HL_PARTITION))
WHERE (REQ.HL_TXNID = 0 OR EX.HL_TXNID != REQ.HL_TXNID)
AND REQ.HL_LOCK_TYPE='e'
AND !(EX.HL_TABLE IS NULL AND EX.HL_LOCK_TYPE='r' AND REQ.HL_TABLE
IS NOT NULL )
LIMIT 1)
UNION ALL
(SELECT EX.*, REQ.HL_LOCK_INT_ID AS REQ_LOCK_INT_ID FROM (
SELECT HL_LOCK_EXT_ID, HL_DB, HL_TABLE, HL_PARTITION, HL_LOCK_STATE,
HL_LOCK_TYPE FROM HIVE_LOCKS
WHERE HL_LOCK_EXT_ID < 333) EX
INNER JOIN (
SELECT HL_DB, HL_TABLE, HL_PARTITION, HL_LOCK_TYPE FROM HIVE_LOCKS WHERE
HL_LOCK_EXT_ID = 333) REQ
ON EX.HL_DB = REQ.HL_DB
AND (EX.HL_TABLE IS NULL OR REQ.HL_TABLE IS NULL OR EX.HL_TABLE =
REQ.HL_TABLE
AND (EX.HL_PARTITION IS NULL OR REQ.HL_PARTITION IS NULL OR EX.HL_PARTITION
= REQ.HL_PARTITION))
WHERE (REQ.HL_TXNID = 0 OR EX.HL_TXNID != REQ.HL_TXNID)
AND REQ.HL_LOCK_TYPE='w' AND EX.HL_LOCK_TYPE IN ('w','e')
LIMIT 1)
UNION ALL
(SELECT EX.*, REQ.HL_LOCK_INT_ID AS REQ_LOCK_INT_ID FROM (
SELECT HL_LOCK_EXT_ID, HL_DB, HL_TABLE, HL_PARTITION, HL_LOCK_STATE,
HL_LOCK_TYPE FROM HIVE_LOCKS
WHERE HL_LOCK_EXT_ID < 333) EX
INNER JOIN (
SELECT HL_DB, HL_TABLE, HL_PARTITION, HL_LOCK_TYPE FROM HIVE_LOCKS WHERE
HL_LOCK_EXT_ID = 333) REQ
ON EX.HL_DB = REQ.HL_DB
AND (EX.HL_TABLE IS NULL OR REQ.HL_TABLE IS NULL OR EX.HL_TABLE =
REQ.HL_TABLE
AND (EX.HL_PARTITION IS NULL OR REQ.HL_PARTITION IS NULL OR EX.HL_PARTITION
= REQ.HL_PARTITION))
WHERE (REQ.HL_TXNID = 0 OR EX.HL_TXNID != REQ.HL_TXNID)
AND REQ.HL_LOCK_TYPE='r' AND EX.HL_LOCK_TYPE='e'
AND !(EX.HL_TABLE IS NOT NULL AND REQ.HL_TABLE IS NULL)
LIMIT 1)
Diffs (updated)
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standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/TxnDbUtil.java
5f51cf5
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/TxnHandler.java
2995afa
Diff: https://reviews.apache.org/r/72249/diff/2/
Changes: https://reviews.apache.org/r/72249/diff/1-2/
Testing
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performance testing before/after change. results attached
File Attachments
----------------
acid-lock-perf-test.xlsx
https://reviews.apache.org/media/uploaded/files/2020/03/19/4cc43e54-407d-43da-b6c9-dc96ff5da828__acid-lock-perf-test.xlsx
Thanks,
Denys Kuzmenko
