dengzhhu653 commented on code in PR #5398:
URL: https://github.com/apache/hive/pull/5398#discussion_r1728041850
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standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/DirectSqlUpdatePart.java:
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@@ -484,14 +477,14 @@ public Map<String, Map<String, String>>
updatePartitionColumnStatistics(Map<Stri
String validWriteIds,
long writeId,
List<TransactionalMetaStoreEventListener> transactionalListeners)
throws MetaException {
+
JDOConnection jdoConn = null;
- Connection dbConn = null;
- boolean committed = false;
+ Transaction tx = pm.currentTransaction();
Review Comment:
It's used to mark we have opened a transaction explicitly, when `jdoConn =
pm.getDataStoreConnection()`, it will get the connection from the primary
connection pool,
https://github.com/apache/hive/blob/master/standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/PersistenceManagerProvider.java#L307
https://github.com/datanucleus/datanucleus-core/blob/master/src/main/java/org/datanucleus/store/AbstractStoreManager.java#L373
https://github.com/datanucleus/datanucleus-core/blob/master/src/main/java/org/datanucleus/store/connection/ConnectionManager.java#L92
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