pvary commented on a change in pull request #2716:
URL: https://github.com/apache/hive/pull/2716#discussion_r730945488
##########
File path:
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/CompactionTxnHandler.java
##########
@@ -529,19 +531,22 @@ public void cleanTxnToWriteIdTable() throws MetaException
{
// If there are no txns which are currently open or aborted in the
system, then current value of
// max(TXNS.txn_id) could be min_uncommitted_txnid.
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\" " +
- "UNION " +
- "SELECT MIN(\"TXN_ID\") AS \"ID\" FROM \"TXNS\" WHERE
\"TXN_STATE\" = " + TxnStatus.ABORTED +
- " OR \"TXN_STATE\" = " + TxnStatus.OPEN +
- ") \"RES\"";
+ " SELECT MAX(\"TXN_ID\") + 1 AS \"ID\" FROM \"TXNS\"" +
+ (useMinHistoryLevel ? "" :
+ " UNION" +
+ " SELECT MIN(\"WS_TXNID\") AS \"ID\" FROM \"WRITE_SET\"") +
Review comment:
I was refering to something like this:
```
(useMinHistoryLevel ? "" : " UNION SELECT MIN(\"WS_TXNID\") AS \"ID\"
FROM \"WRITE_SET\"") +
```
Isn't this better?
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