pvargacl commented on a change in pull request #1151:
URL: https://github.com/apache/hive/pull/1151#discussion_r444694060
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File path: ql/src/test/org/apache/hadoop/hive/ql/lockmgr/TestDbTxnManager2.java
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@@ -2329,6 +2338,142 @@ private void
testConcurrentMergeInsertNoDuplicates(String query, boolean sharedW
List res = new ArrayList();
driver.getFetchTask().fetch(res);
Assert.assertEquals("Duplicate records found", 4, res.size());
+ dropTable(new String[]{"target", "source"});
+ }
+
+ /**
+ * ValidTxnManager.isValidTxnListState can invalidate a snapshot if a
relevant write transaction was committed
+ * between a query compilation and lock acquisition. When this happens we
have to recompile the given query,
+ * otherwise we can miss reading partitions created between. The following
three cases test these scenarios.
+ * @throws Exception ex
+ */
+ @Test
+ public void testMergeInsertDynamicPartitioningSequential() throws Exception {
+
+ dropTable(new String[]{"target", "source"});
+ conf.setBoolVar(HiveConf.ConfVars.TXN_WRITE_X_LOCK, false);
+
+ // Create partition c=1
+ driver.run("create table target (a int, b int) partitioned by (c int)
stored as orc TBLPROPERTIES ('transactional'='true')");
+ driver.run("insert into target values (1,1,1), (2,2,1)");
+ //Create partition c=2
+ driver.run("create table source (a int, b int) partitioned by (c int)
stored as orc TBLPROPERTIES ('transactional'='true')");
+ driver.run("insert into source values (3,3,2), (4,4,2)");
+
+ // txn 1 inserts data to an old and a new partition
+ driver.run("insert into source values (5,5,2), (6,6,3)");
+
+ // txn 2 inserts into the target table into a new partition ( and a
duplicate considering the source table)
+ driver.run("insert into target values (3, 3, 2)");
+
+ // txn3 merge
+ driver.run("merge into target t using source s on t.a = s.a " +
+ "when not matched then insert values (s.a, s.b, s.c)");
+ driver.run("select * from target");
+ List res = new ArrayList();
+ driver.getFetchTask().fetch(res);
+ // The merge should see all three partition and not create duplicates
+ Assert.assertEquals("Duplicate records found", 6, res.size());
+ Assert.assertTrue("Partition 3 was skipped", res.contains("6\t6\t3"));
+ dropTable(new String[]{"target", "source"});
Review comment:
This just makes the local reexecution easier. If the test finishes it
leaves some data in the warehouse folder and even if the next run starts with
drop table if exists, it won't clean the folder since the table is not existing
the hms
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