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https://issues.apache.org/jira/browse/HBASE-11788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14107135#comment-14107135
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Cristian Armaselu commented on HBASE-11788:
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checkAndMutate would be nice, but we also use hive to insert data. For that we
apply a coprocessor (prePut) to turn the empty values inserted from hive into
cell deletes (DeleteColumn). Since hive generates Puts and not Mutations, we
will have still have the same issue. The old behavior was working really well.
Was it changed on purpose?
> hbase is not deleting the cell when a Put with a KeyValue,
> KeyValue.Type.Delete is submitted
> --------------------------------------------------------------------------------------------
>
> Key: HBASE-11788
> URL: https://issues.apache.org/jira/browse/HBASE-11788
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.99.0, 0.96.1.1, 0.98.5, 2.0.0
> Environment: Cloudera CDH 5.1.x
> Reporter: Cristian Armaselu
> Assignee: Srikanth Srungarapu
> Attachments: TestPutWithDelete.java
>
>
> Code executed:
> {code}
> @Test
> public void testHbasePutDeleteCell() throws Exception {
> TableName tableName = TableName.valueOf("my_test");
> Configuration configuration = HBaseConfiguration.create();
> HTableInterface table = new HTable(configuration, tableName);
> final String rowKey = "12345";
> final byte[] familly = Bytes.toBytes("default");
> // put one row
> Put put = new Put(Bytes.toBytes(rowKey));
> put.add(familly, Bytes.toBytes("A"), Bytes.toBytes("a"));
> put.add(familly, Bytes.toBytes("B"), Bytes.toBytes("b"));
> put.add(familly, Bytes.toBytes("C"), Bytes.toBytes("c"));
> table.put(put);
> // get row back and assert the values
> Get get = new Get(Bytes.toBytes(rowKey));
> Result result = table.get(get);
> Assert.isTrue(Bytes.toString(result.getValue(familly,
> Bytes.toBytes("A"))).equals("a"), "Column A value should be a");
> Assert.isTrue(Bytes.toString(result.getValue(familly,
> Bytes.toBytes("B"))).equals("b"), "Column B value should be b");
> Assert.isTrue(Bytes.toString(result.getValue(familly,
> Bytes.toBytes("C"))).equals("c"), "Column C value should be c");
> // put the same row again with C column deleted
> put = new Put(Bytes.toBytes(rowKey));
> put.add(familly, Bytes.toBytes("A"), Bytes.toBytes("a"));
> put.add(familly, Bytes.toBytes("B"), Bytes.toBytes("b"));
> put.add(new KeyValue(Bytes.toBytes(rowKey), familly,
> Bytes.toBytes("C"), HConstants.LATEST_TIMESTAMP, KeyValue.Type.DeleteColumn));
> table.put(put);
> // get row back and assert the values
> get = new Get(Bytes.toBytes(rowKey));
> result = table.get(get);
> Assert.isTrue(Bytes.toString(result.getValue(familly,
> Bytes.toBytes("A"))).equals("a"), "Column A value should be a");
> Assert.isTrue(Bytes.toString(result.getValue(familly,
> Bytes.toBytes("B"))).equals("b"), "Column A value should be b");
> Assert.isTrue(result.getValue(familly, Bytes.toBytes("C")) == null,
> "Column C should not exists");
> }
> {code}
> This assertion fails, the cell is not deleted but rather the value is empty:
> {code}
> hbase(main):029:0> scan 'my_test'
> ROW COLUMN+CELL
>
>
> 12345 column=default:A,
> timestamp=1408473082290, value=a
>
> 12345 column=default:B,
> timestamp=1408473082290, value=b
>
> 12345 column=default:C,
> timestamp=1408473082290, value=
> {code}
> This behavior is different than previous 4.8.x Cloudera version and is
> currently corrupting all hive queries involving is null or is not null
> operators on the columns mapped to hbase
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