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https://issues.apache.org/jira/browse/HIVE-23671?focusedWorklogId=455355&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-455355
]
ASF GitHub Bot logged work on HIVE-23671:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 07/Jul/20 11:14
Start Date: 07/Jul/20 11:14
Worklog Time Spent: 10m
Work Description: pvargacl commented on a change in pull request #1087:
URL: https://github.com/apache/hive/pull/1087#discussion_r450787844
##########
File path:
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/TxnHandler.java
##########
@@ -2015,8 +2019,49 @@ public AllocateTableWriteIdsResponse
allocateTableWriteIds(AllocateTableWriteIds
return allocateTableWriteIds(rqst);
}
}
+
+ @Override
+ public MaxAllocatedTableWriteIdResponse
getMaxAllocatedTableWrited(MaxAllocatedTableWriteIdRequest rqst) throws
MetaException {
+ String dbName = rqst.getDbName();
+ String tableName = rqst.getTableName();
+ try {
+ Connection dbConn = null;
+ PreparedStatement pStmt = null;
+ ResultSet rs = null;
+ try {
+ lockInternal();
+ dbConn = getDbConn(Connection.TRANSACTION_READ_COMMITTED);
+ List<String> params = Arrays.asList(dbName, tableName);
+ String query = "SELECT \"NWI_NEXT\" FROM \"NEXT_WRITE_ID\" WHERE
\"NWI_DATABASE\" = ? AND \"NWI_TABLE\" = ?";
+ pStmt = sqlGenerator.prepareStmtWithParameters(dbConn, query, params);
Review comment:
fixed
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Issue Time Tracking
-------------------
Worklog Id: (was: 455355)
Time Spent: 11h 10m (was: 11h)
> MSCK repair should handle transactional tables in certain usecases
> ------------------------------------------------------------------
>
> Key: HIVE-23671
> URL: https://issues.apache.org/jira/browse/HIVE-23671
> Project: Hive
> Issue Type: Improvement
> Components: Metastore
> Reporter: Peter Varga
> Assignee: Peter Varga
> Priority: Major
> Labels: pull-request-available
> Time Spent: 11h 10m
> Remaining Estimate: 0h
>
> The MSCK REPAIR tool does not handle transactional tables too well. It can
> find and add new partitions the same way as for non-transactional tables, but
> since the writeId differences are not handled, the data can not read back
> from the new partitions.
> We could handle some usecases when the writeIds in the HMS and the underlying
> data are not conflicting. If the HMS does not contains allocated writes for
> the table we can seed the table with the writeIds read from the directory
> structrure.
> Real life use cases could be:
> * Copy data files from one cluster to another with different HMS, create the
> table and call MSCK REPAIR
> * If the HMS db is lost, recreate the table and call MSCK REPAIR
>
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