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https://issues.apache.org/jira/browse/HIVE-24828?focusedWorklogId=575600&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-575600
]
ASF GitHub Bot logged work on HIVE-24828:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 01/Apr/21 16:28
Start Date: 01/Apr/21 16:28
Worklog Time Spent: 10m
Work Description: klcopp commented on a change in pull request #2073:
URL: https://github.com/apache/hive/pull/2073#discussion_r605790475
##########
File path:
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/TxnHandler.java
##########
@@ -3646,6 +3649,86 @@ public ShowCompactResponse
showCompact(ShowCompactRequest rqst) throws MetaExcep
}
}
+ /**
+ * We assume this is only called by metadata cache server to know if there
are new base/delta files should be read.
+ * The query filters compactions by state and only returns SUCCEEDED or
READY_FOR_CLEANING compactions because
+ * only these two states means there are new files ready to be read.
+ */
+ @RetrySemantics.ReadOnly
+ public GetLatestCompactionInfoResponse
getLatestCompactionInfo(GetLatestCompactionInfoRequest rqst)
+ throws MetaException {
+ GetLatestCompactionInfoResponse response = new
GetLatestCompactionInfoResponse(new ArrayList<>());
+ Connection dbConn = null;
+ PreparedStatement pst = null;
+ ResultSet rs = null;
+ try {
+ try {
+ dbConn = getDbConn(Connection.TRANSACTION_READ_COMMITTED);
+
+ List<String> params = new ArrayList<>();
+ // This query combines the result sets of SUCCEEDED compactions and
READY_FOR_CLEANING compactions
+ // We also sort the result by CC_ID in descending order so that we can
keep only the latest record
+ // according to the order in result set
+ StringBuilder sb = new StringBuilder()
+ .append("SELECT * FROM (")
Review comment:
No, never mind then
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Issue Time Tracking
-------------------
Worklog Id: (was: 575600)
Time Spent: 5h 10m (was: 5h)
> [HMS] Provide new HMS API to return latest committed compaction record for a
> given table
> ----------------------------------------------------------------------------------------
>
> Key: HIVE-24828
> URL: https://issues.apache.org/jira/browse/HIVE-24828
> Project: Hive
> Issue Type: Sub-task
> Components: HiveServer2
> Reporter: Kishen Das
> Assignee: Yu-Wen Lai
> Priority: Major
> Labels: pull-request-available
> Time Spent: 5h 10m
> Remaining Estimate: 0h
>
> We need a new HMS API to return the latest committed compaction record for a
> given table. This can be used by a remote cache to decide whether a given
> table's file metadata has been compacted or not, in order to decide whether
> file metadata has to be refreshed from the file system before serving or it
> can serve the current data from the cache.
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