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https://issues.apache.org/jira/browse/HIVE-14366?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Saket Saurabh updated HIVE-14366:
---------------------------------
Attachment: HIVE-14366.01.patch
Initial patch to fix the bug by reusing the globally unique rowNumbers found in
the orc files.
> Conversion of a Non-ACID table to an ACID table produces non-unique primary
> keys
> --------------------------------------------------------------------------------
>
> Key: HIVE-14366
> URL: https://issues.apache.org/jira/browse/HIVE-14366
> Project: Hive
> Issue Type: Bug
> Components: Transactions
> Reporter: Saket Saurabh
> Assignee: Eugene Koifman
> Attachments: HIVE-14366.01.patch
>
>
> When a Non-ACID table is converted to an ACID table, the primary key
> consisting of (original transaction id, bucket_id, row_id) is not generated
> uniquely. Currently, the row_id is always set to 0 for most rows. This leads
> to correctness issue for such tables.
> Quickest way to reproduce is to add the following unit test to
> ql/src/test/org/apache/hadoop/hive/ql/TestTxnCommands2.java
> {code:title=ql/src/test/org/apache/hadoop/hive/ql/TestTxnCommands2.java|borderStyle=solid}
> @Test
> public void testOriginalReader() throws Exception {
> FileSystem fs = FileSystem.get(hiveConf);
> FileStatus[] status;
> // 1. Insert five rows to Non-ACID table.
> runStatementOnDriver("insert into " + Table.NONACIDORCTBL + "(a,b)
> values(1,2),(3,4),(5,6),(7,8),(9,10)");
> // 2. Convert NONACIDORCTBL to ACID table.
> runStatementOnDriver("alter table " + Table.NONACIDORCTBL + " SET
> TBLPROPERTIES ('transactional'='true')");
> // 3. Perform a major compaction.
> runStatementOnDriver("alter table "+ Table.NONACIDORCTBL + " compact
> 'MAJOR'");
> runWorker(hiveConf);
> // 4. Perform a delete.
> runStatementOnDriver("delete from " + Table.NONACIDORCTBL + " where a =
> 1");
> // 5. Now do a projection should have (3,4) (5,6),(7,8),(9,10) only since
> (1,2) has been deleted.
> List<String> rs = runStatementOnDriver("select a,b from " +
> Table.NONACIDORCTBL + " order by a,b");
> int[][] resultData = new int[][] {{3,4}, {5,6}, {7,8}, {9,10}};
> Assert.assertEquals(stringifyValues(resultData), rs);
> }
> {code}
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