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https://issues.apache.org/jira/browse/HIVE-25346?focusedWorklogId=649849&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-649849
]
ASF GitHub Bot logged work on HIVE-25346:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 13/Sep/21 06:49
Start Date: 13/Sep/21 06:49
Worklog Time Spent: 10m
Work Description: deniskuzZ commented on a change in pull request #2547:
URL: https://github.com/apache/hive/pull/2547#discussion_r707048954
##########
File path:
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/CompactionTxnHandler.java
##########
@@ -531,7 +531,7 @@ public void cleanTxnToWriteIdTable() throws MetaException {
String s = "SELECT MIN(\"RES\".\"ID\") AS \"ID\" FROM (" +
"SELECT MAX(\"TXN_ID\") + 1 AS \"ID\" FROM \"TXNS\" " +
"UNION " +
- "SELECT MIN(\"WS_COMMIT_ID\") AS \"ID\" FROM \"WRITE_SET\" " +
+ "SELECT MIN(\"WS_TXNID\") AS \"ID\" FROM \"WRITE_SET\" " +
Review comment:
that is correct. However, I don't understand how this is supposed to
replace MIN_HISTORY table. Original code:
````
long minUncommittedTxnId = findMinOpenTxnGLB(stmt);
// If there are aborted txns, then the minimum aborted txnid could be the
min_uncommitted_txnid
// if lesser than both NEXT_TXN_ID.ntxn_next and min(MIN_HISTORY_LEVEL
.mhl_min_open_txnid).
String s = "SELECT MIN(\"TXN_ID\") FROM \"TXNS\" WHERE \"TXN_STATE\" = " +
quoteChar(TXN_ABORTED);
minUncommittedTxnId = Math.min(minAbortedTxnId, minUncommittedTxnId);
```
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Issue Time Tracking
-------------------
Worklog Id: (was: 649849)
Time Spent: 5h 50m (was: 5h 40m)
> cleanTxnToWriteIdTable breaks SNAPSHOT isolation
> ------------------------------------------------
>
> Key: HIVE-25346
> URL: https://issues.apache.org/jira/browse/HIVE-25346
> Project: Hive
> Issue Type: Bug
> Reporter: Zoltan Chovan
> Assignee: Zoltan Chovan
> Priority: Major
> Labels: pull-request-available
> Time Spent: 5h 50m
> Remaining Estimate: 0h
>
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