deniskuzZ commented on a change in pull request #1688:
URL: https://github.com/apache/hive/pull/1688#discussion_r530247484
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File path:
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/TxnHandler.java
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@@ -390,6 +404,42 @@ public void setConf(Configuration conf){
}
}
+ /**
+ * Check if min_history_level table is usable
+ * @return
+ * @throws MetaException
+ */
+ private boolean checkMinHistoryLevelTable(boolean configValue) throws
MetaException {
+ if (!configValue) {
+ // don't check it if disabled
+ return false;
+ }
+ Connection dbConn = null;
+ boolean tableExists = true;
+ try {
+ dbConn = getDbConn(Connection.TRANSACTION_READ_COMMITTED);
+ try (Statement stmt = dbConn.createStatement()) {
+ // Dummy query to see if table exists
+ try (ResultSet rs = stmt.executeQuery("SELECT
MIN(\"MHL_MIN_OPEN_TXNID\") FROM \"MIN_HISTORY_LEVEL\"")) {
Review comment:
you can just select 1
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