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<title>Release Notes - Tajo - Version 0.11.0</title>
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<body>
<h1>Release Notes - Tajo - Version 0.11.0</h1>
<h2>Changes since Tajo 0.10.0</h2>
<h2> Sub-task
</h2>
<ul>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-921">TAJO-921</a>] - Add STDDEV_SAMP and STDDEV_POP window functions
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-923">TAJO-923</a>] - Add VAR_SAMP and VAR_POP window functions
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1260">TAJO-1260</a>] - Add ALTER TABLE ADD/DROP PARTITION statement to parser
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1284">TAJO-1284</a>] - Add alter partition method to CatalogStore
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1329">TAJO-1329</a>] - Improve Schema class to support nested struct support
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1337">TAJO-1337</a>] - Implements common modules to handle RESTful API
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1338">TAJO-1338</a>] - Defines RESTful API for Clients
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1345">TAJO-1345</a>] - Implement logical plan part and DDL executor for alter partition.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1346">TAJO-1346</a>] - Create dynamic partitions to CatalogStore by running insert query or CTAS query.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1351">TAJO-1351</a>] - Resolve findbug warnings on Tajo Common Module
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1353">TAJO-1353</a>] - Nested record support in CREATE TABLE statement
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1357">TAJO-1357</a>] - Resolve findbugs warnings on Tajo Catalog Modules
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1359">TAJO-1359</a>] - Add nested field projector and language extension to project nested record
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1362">TAJO-1362</a>] - Resolve findbug warnings on Tajo Core Module
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1392">TAJO-1392</a>] - Resolve findbug warnings on Tajo Plan Module
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1393">TAJO-1393</a>] - Resolve findbug warnings on Tajo Cli Module
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1437">TAJO-1437</a>] - Resolve findbug warnings on Tajo JDBC Module
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1464">TAJO-1464</a>] - Add ORCFileScanner to read ORCFile table
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1465">TAJO-1465</a>] - Add ORCFileAppender to write into ORCFile table
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1484">TAJO-1484</a>] - Apply on ColPartitionStoreExec
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1493">TAJO-1493</a>] - Make partition pruning based on catalog informations
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1496">TAJO-1496</a>] - Remove legacy CSVFile
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1514">TAJO-1514</a>] - Distinguish UNION and UNION ALL
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1525">TAJO-1525</a>] - Implement INTERSECT [ALL] physical operator
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1529">TAJO-1529</a>] - Implement json_extract_path_text(string, string) function
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1599">TAJO-1599</a>] - Implement NodeResourceManager and Status updater
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1603">TAJO-1603</a>] - Refactor StorageManager
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1613">TAJO-1613</a>] - Rename StorageManager to Tablespace
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1614">TAJO-1614</a>] - Configuration format proposal for generic storage support
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1615">TAJO-1615</a>] - Implement TaskManager
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1616">TAJO-1616</a>] - Implement TablespaceManager to load Tablespaces
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1617">TAJO-1617</a>] - Storage configuration reader
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1641">TAJO-1641</a>] - Add window function documentation
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1652">TAJO-1652</a>] - Automatic metadata registeration from underlying storages
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1658">TAJO-1658</a>] - Filter push down to underlying storages
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1663">TAJO-1663</a>] - Change the variable name storeType to dataFormat
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1670">TAJO-1670</a>] - Refactor client errors and exceptions
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1673">TAJO-1673</a>] - Implement recover partitions
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1684">TAJO-1684</a>] - CREATE EXTERNAL TABLE should allows just a path.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1691">TAJO-1691</a>] - Refactor visitors and planner to throw TajoException
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1693">TAJO-1693</a>] - Rearrange metric names
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1694">TAJO-1694</a>] - Add cluster resource metrics
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1723">TAJO-1723</a>] - INSERT INTO statement should allow nested fields as target columns
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1735">TAJO-1735</a>] - Implement MetadataProvider and LinkedMetadataManager
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1737">TAJO-1737</a>] - Implement SQL Parser rule for Map type
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1739">TAJO-1739</a>] - Add a statement for adding partition to TajoDump
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1748">TAJO-1748</a>] - Refine client APIs to throw specific exceptions
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1749">TAJO-1749</a>] - Refine JDBC exceptions to better handle exceptional cases.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1754">TAJO-1754</a>] - Implement several functions to handle json array
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1758">TAJO-1758</a>] - Some TajoRuntimeException should be restored as TajoException in client side
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1787">TAJO-1787</a>] - Remove unused and legacy exceptions
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1824">TAJO-1824</a>] - Remove partition_keys table from information_schema
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1826">TAJO-1826</a>] - Revert 'refining code for Parquet 1.8.1'
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1841">TAJO-1841</a>] - Eliminate explicit diamond expressions in tajo-{algebra,rpc}
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1853">TAJO-1853</a>] - Add tablespace syntax to the CREATE TABLE section of DDL page
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1887">TAJO-1887</a>] - Disable the alter table add partition statement temporarily.
</li>
</ul>
<h2> Bug
</h2>
<ul>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1146">TAJO-1146</a>] - TajoWorkerResources are occasionally not released after the query completion relating to semaphore condition.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1147">TAJO-1147</a>] - Simple query doesn't work in Web UI
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1277">TAJO-1277</a>] - GreedyHeuristicJoinOrderAlgorithm sometimes wrongly assumes associativity of joins
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1283">TAJO-1283</a>] - ORDER BY with the first descending order causes wrong results
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1316">TAJO-1316</a>] - NPE occurs when performing window functions after join
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1324">TAJO-1324</a>] - Remove warehouse directory rewriting in Unit Test
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1325">TAJO-1325</a>] - Invalid history cleaner timeout
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1341">TAJO-1341</a>] - The result type of modular operation must be integer.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1356">TAJO-1356</a>] - Race conditions in QueryInProgress
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1360">TAJO-1360</a>] - VALUES_ field in OPTIONS table of catalog store should be longer.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1365">TAJO-1365</a>] - Suppress release audit warnings on Jekins builds
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1368">TAJO-1368</a>] - Exceptions during processing nested union queries
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1370">TAJO-1370</a>] - TUtils.checkEquals() is not consistent with description in javadoc
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1384">TAJO-1384</a>] - Duplicated output file path problem
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1386">TAJO-1386</a>] - CURRENT_DATE generates parsing errors sometimes.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1387">TAJO-1387</a>] - Correct error message for EXISTS clause
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1396">TAJO-1396</a>] - Unexpected IllegalMonitorStateException can be thrown in QueryInProgress
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1399">TAJO-1399</a>] - TajoResourceAllocator might hang on network error
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1405">TAJO-1405</a>] - Fix some illegal way of usages on connection pool
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1413">TAJO-1413</a>] - tsql should not print a stacktrace message of not critical exceptions
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1414">TAJO-1414</a>] - Two RemoteException in rpc module
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1434">TAJO-1434</a>] - Fix supporting version of Hadoop
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1440">TAJO-1440</a>] - Some tests fail in parallel test environment in TestKillQuery
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1445">TAJO-1445</a>] - Optimizer removes some filter in where clause.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1446">TAJO-1446</a>] - Comparison of boolean datum is not valid
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1449">TAJO-1449</a>] - TestSelectQuery.testExplainSelect() fails
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1467">TAJO-1467</a>] - Parenthesis at the start of SQL query is ignored
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1468">TAJO-1468</a>] - Integration test does not terminate occasionally
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1469">TAJO-1469</a>] - allocateQueryMaster can leak resources if it times-out (3sec, hardcoded)
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1479">TAJO-1479</a>] - NPE during startup CatalogStore
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1481">TAJO-1481</a>] - Numeric conversion of Inet4 type should be considered as unsigned
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1485">TAJO-1485</a>] - Datum 'Char' returned only 1byte.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1497">TAJO-1497</a>] - RPC client does not share a connection
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1510">TAJO-1510</a>] - Change a function name from getFileCunks to getFileChunks
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1512">TAJO-1512</a>] - Fix various Expr cloning bugs
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1522">TAJO-1522</a>] - NPE making stage history before task scheduler is initialized
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1534">TAJO-1534</a>] - DelimitedTextFile return null instead of a NullDatum
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1536">TAJO-1536</a>] - Fix minor issues in QueryMaster
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1538">TAJO-1538</a>] - TajoWorkerResourceManager.allocatedResourceMap is increasing forever
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1540">TAJO-1540</a>] - RpcCallback must be able to handle TimeoutException or cancel.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1541">TAJO-1541</a>] - Connection timeout in netty client is not working
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1556">TAJO-1556</a>] - "insert into select" with reordered column list does not work.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1558">TAJO-1558</a>] - HBASE_LIB/hbase-server-*.jar should be included in the CLASSPATH
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1560">TAJO-1560</a>] - HashShuffle report should be ignored when a succeed tasks are not included
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1564">TAJO-1564</a>] - TestFetcher fails occasionally
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1569">TAJO-1569</a>] - BlockingRpcClient can make other request fail
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1574">TAJO-1574</a>] - Fix NPE on natural join
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1580">TAJO-1580</a>] - Error line number is incorrect
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1581">TAJO-1581</a>] - Does not update last state of query stage in non-hash shuffle
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1582">TAJO-1582</a>] - Occasional resource leak in RawFile during test
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1586">TAJO-1586</a>] - TajoMaster HA startup failure on Yarn.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1593">TAJO-1593</a>] - Add missing stop condition to Taskrunner
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1596">TAJO-1596</a>] - TestPythonFunctions occasionally fails
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1597">TAJO-1597</a>] - Problem of ignoring theta join condition
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1598">TAJO-1598</a>] - TableMeta should change equals mechanism
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1600">TAJO-1600</a>] - Invalid query planning for distinct group-by
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1601">TAJO-1601</a>] - '\d information_schema' does not work
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1605">TAJO-1605</a>] - Fix master build failure on jdk 1.6
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1606">TAJO-1606</a>] - IF NOT EXISTS is not checked for CTAS queries
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1610">TAJO-1610</a>] - Cannot find column when the same name is used for table and database
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1620">TAJO-1620</a>] - random() in an SQL should generate RANDOM numbers
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1621">TAJO-1621</a>] - Compilation error with hadoop 2.7.0
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1622">TAJO-1622</a>] - UniformRangePartition occasionally causes IllegalStateException
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1630">TAJO-1630</a>] - Test failure after TAJO-1130
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1634">TAJO-1634</a>] - REST API: fix error when offset is zero
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1642">TAJO-1642</a>] - CatalogServer need to check meta table first.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1644">TAJO-1644</a>] - When inserting empty data into a partitioned table, existing data would be removed.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1650">TAJO-1650</a>] - TestQueryResource.testGetAllQueries() occasionally fails
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1674">TAJO-1674</a>] - Validation of CTAS schema mismatch
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1676">TAJO-1676</a>] - Queries on information_schema.partitions table return invalid result
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1679">TAJO-1679</a>] - Client APIs should validate identifiers for database object names
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1681">TAJO-1681</a>] - Fix TajoDump invalid null check for database name
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1689">TAJO-1689</a>] - Metrics file reporter prints histogram metric without group name.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1690">TAJO-1690</a>] - Create table using text file fails in HiveCatalogStore.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1697">TAJO-1697</a>] - RCFile progress causes NPE occasionally
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1702">TAJO-1702</a>] - Fix race condition in finished query cache
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1706">TAJO-1706</a>] - querytasks.jsp in Worker causes NPE when a running EB page is open.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1707">TAJO-1707</a>] - Rack local count can be more than actual number of tasks.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1712">TAJO-1712</a>] - querytasks.jsp throws NPE occasionally when tasks are running.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1716">TAJO-1716</a>] - Repartitioner.makeEvenDistributedFetchImpl() does not distribute fetches evenly
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1725">TAJO-1725</a>] - TaskContainer can hang when RuntimeException occurs in TaskImpl.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1726">TAJO-1726</a>] - Error in a running TaskAttempt may cause invalid event.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1727">TAJO-1727</a>] - Avoid to create external table using TableSpace
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1731">TAJO-1731</a>] - With a task failure, query processing is hanged after first retry
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1732">TAJO-1732</a>] - During filter push down phase, join conditions are not set properly
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1733">TAJO-1733</a>] - Finished query occasionally does not appear in Web-UI
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1741">TAJO-1741</a>] - Two tables having same time zone display different timestamps
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1742">TAJO-1742</a>] - Remove hadoop dependency in DatumFactory
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1752">TAJO-1752</a>] - NameResolver cannot find nested records properly
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1763">TAJO-1763</a>] - tpch/*.tbl files cannot be founded in maven modules except for core-tests.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1776">TAJO-1776</a>] - Fix Invalid column type in JDBC
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1777">TAJO-1777</a>] - JsonLineDeserializer returns invalid unicode text, if contains control character
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1779">TAJO-1779</a>] - Remove "DFSInputStream has been closed already" messages in DelimitedLineReader
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1781">TAJO-1781</a>] - Join condition is still not found when it exists in OR clause
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1782">TAJO-1782</a>] - Check ON_ERROR_STOP flag in TSQL when error is occured
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1783">TAJO-1783</a>] - Query result is not returned by invalid output path
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1790">TAJO-1790</a>] - TestTajoClientV2::testExecuteQueryAsyncWithListener occasionally is failed
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1796">TAJO-1796</a>] - Count all query for Parquet is crashed
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1797">TAJO-1797</a>] - Workers cannot bind web server address when it starts
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1798">TAJO-1798</a>] - Dynamic partitioning occasionally fails.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1799">TAJO-1799</a>] - Fix incorrect event handler when kill-query failed
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1800">TAJO-1800</a>] - WHERE clause is ignored with UNION
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1801">TAJO-1801</a>] - Table name is not unique of tableDescMap in QueryMasterTask
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1802">TAJO-1802</a>] - PythonScriptEngine copies controller and tajo util whenever it is initialized
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1808">TAJO-1808</a>] - Wrong table type problem in catalog
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1811">TAJO-1811</a>] - Catalog server address must be set dynamically during test
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1815">TAJO-1815</a>] - Catalog store initialization with PostgreSQL failed
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1819">TAJO-1819</a>] - Cannot find existing tables when pgsql catalog starts up
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1820">TAJO-1820</a>] - Fix wrong case sensitivity rules of non-reserved keywords
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1821">TAJO-1821</a>] - Temporary data is not cleared after TestCatalog
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1822">TAJO-1822</a>] - Missing return state when CatalogServer.getAllIndexes() is called
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1823">TAJO-1823</a>] - Can't start TajoMaster
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1827">TAJO-1827</a>] - JSON parsing error at storage-site.json while tajo master starts up
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1829">TAJO-1829</a>] - Fix DelimitedTextFileAppender NPE in negative tests
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1830">TAJO-1830</a>] - Fix race condition in HdfsServiceTracker
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1835">TAJO-1835</a>] - TajoClient::executeQueryAndGetResult should throw Query(Failed|Killed)Exception
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1838">TAJO-1838</a>] - Create external table fails using hbase if tablespaces don't include the location.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1839">TAJO-1839</a>]
- IllegalStateException when querying external table using
hbase if storage-site.json doesn't exist on configuration directory.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1846">TAJO-1846</a>] - Python temp directory path should be selected differently based on user platform
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1848">TAJO-1848</a>] - ShutdownHook in TajoMaster can throw NPE if serviceInit() is failed.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1851">TAJO-1851</a>] - Can not release a different rack task
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1861">TAJO-1861</a>] - TSQL should change line after printout error message during connecting other database
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1863">TAJO-1863</a>] - CTAS with union clause does not work properly
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1869">TAJO-1869</a>] - Incorrect result when sorting table with small files
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1871">TAJO-1871</a>] - '-DskipTests' flag does not work
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1873">TAJO-1873</a>] - Fix NPE in QueryExecutorServlet
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1884">TAJO-1884</a>] - Add missing jetty-util dependency
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1889">TAJO-1889</a>] - UndefinedColumnException when a query with table subquery is executed on self-describing tables
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1894">TAJO-1894</a>] - Filter condition is ignored when a query involves multiple subqueries and aggregations
</li>
</ul>
<h2> Improvement
</h2>
<ul>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-680">TAJO-680</a>] - Improve the IN operator to support sub queries
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-751">TAJO-751</a>] - JDBC driver should support cancel() method.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-993">TAJO-993</a>] - Cleanup the result data in HDFS after query finished.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1134">TAJO-1134</a>] - start-tajo.sh should display WEB UI URL and TajoMaster RPC address
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1160">TAJO-1160</a>] - Remove Hadoop dependency from tajo-client module
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1269">TAJO-1269</a>] - Separate cli from tajo-client
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1311">TAJO-1311</a>] - Enable Scattered Hash Shuffle for CTAS statement.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1326">TAJO-1326</a>] - Remove legacy memory task histories
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1328">TAJO-1328</a>] - Fix deprecated property names in the catalog configuration document
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1335">TAJO-1335</a>] - Bump up 0.10.0-SNAPSHOT to 0.11.0-SNAPSHOT in master branch
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1340">TAJO-1340</a>] - Change the default output file format.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1343">TAJO-1343</a>] - Improve the memory usage of physical executors
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1350">TAJO-1350</a>] - Refactor FilterPushDownRule::visitJoin() into well-defined, small methods
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1352">TAJO-1352</a>] - Improve the join order algorithm to consider missed cases of associative join operators
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1369">TAJO-1369</a>] - Some stack trace information is missed in error/fail logging
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1374">TAJO-1374</a>] - Support multi-bytes delimiter for CSV file
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1381">TAJO-1381</a>] - Support multi-bytes delimiter for Text file
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1383">TAJO-1383</a>] - Improve broadcast table cache
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1391">TAJO-1391</a>] - RpcConnectionPool should check reference counter of connection before close
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1394">TAJO-1394</a>] - Support reconnect on tsql
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1395">TAJO-1395</a>] - Remove deprecated sql files for Oracle and PostgreSQL
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1397">TAJO-1397</a>] - Resource allocation should be fine grained.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1400">TAJO-1400</a>] - Add TajoStatement::setMaxRows method support
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1403">TAJO-1403</a>] - Improve 'Simple Query' with only partition columns and constant values
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1408">TAJO-1408</a>] - Make IntermediateEntryProto more compact
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1409">TAJO-1409</a>] - Clients calling remote services returning BoolProto ignores false values
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1418">TAJO-1418</a>] - Comment on TAJO_PULLSERVER_STANDALONE in tajo-env.sh is not consistent
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1422">TAJO-1422</a>] - Investigate the case where fragments == null in SeqScanExec
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1436">TAJO-1436</a>] - Add Bind method to EvalNode
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1442">TAJO-1442</a>] - Improve Hive Compatibility
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1454">TAJO-1454</a>] - Comparing two date or two timestamp need not normalizing
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1460">TAJO-1460</a>] - Apply TAJO-1407 to ExternalSortExec
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1495">TAJO-1495</a>] - Clean up CatalogStore
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1499">TAJO-1499</a>] - Check the bind status when EvalNode::eval() is called
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1501">TAJO-1501</a>] - Too many log message of HashShuffleAppenderManager.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1507">TAJO-1507</a>] - Resource leak when a worker does not response KILLED message
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1508">TAJO-1508</a>] - ResourceTracker does not update workers' resource capacities after the first join
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1509">TAJO-1509</a>] - Use dedicated thread to release resource allocated to container
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1523">TAJO-1523</a>] - ClassSize should consider compressed oops
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1530">TAJO-1530</a>] - Display warn message when the query kill button is clicked in WEB UI.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1542">TAJO-1542</a>] - Refactoring of HashJoinExecs
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1548">TAJO-1548</a>] - Refactoring condition code for CHAR into CatalogUtil
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1551">TAJO-1551</a>] - Reuse allocated resources in next execution block if possible
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1553">TAJO-1553</a>] - Improve broadcast join planning
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1563">TAJO-1563</a>] - Improve RPC error handling
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1570">TAJO-1570</a>] - CatalogUtil newSimpleDataTypeArray should use newSimpleDataType
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1576">TAJO-1576</a>] - Sometimes DefaultTajoCliOutputFormatter.parseErrorMessage() eliminates an important kind of information.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1577">TAJO-1577</a>] - Add test cases to verify join plans
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1584">TAJO-1584</a>] - Remove QueryMaster client sharing in TajoMaster and TajoWorker
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1591">TAJO-1591</a>] - Change StoreType represented as Enum to String type
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1595">TAJO-1595</a>] - Pluggable Storage Handler
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1607">TAJO-1607</a>] - Tajo Rest Cache-Id should be bigger than zero
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1623">TAJO-1623</a>] - INSERT INTO with wrong target columns causes NPE.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1624">TAJO-1624</a>] - Add managed table or external description in Table management section
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1625">TAJO-1625</a>] - Recap error propagation system
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1626">TAJO-1626</a>] - JdbcConnection::setAutoCommit() should not throw an exception.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1633">TAJO-1633</a>] - Cleanup TajoMasterClientService
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1636">TAJO-1636</a>] - query rest api uri should change from /databases/{database_name}/queies to /queries
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1638">TAJO-1638</a>] - Remove offset parameter from rest api result/{cacheId}
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1645">TAJO-1645</a>] - Bump up hbase to 1.1.1
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1646">TAJO-1646</a>] - Add extlib directory for third-party libraries
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1649">TAJO-1649</a>] - Change Rest API /databases/{database-name}/functions to /functions
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1651">TAJO-1651</a>] - Too long fetcher default retries
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1659">TAJO-1659</a>] - Simplify scan iteration in SeqScan
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1660">TAJO-1660</a>] - Update copyright year in NOTICE
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1672">TAJO-1672</a>] - Removing rest api to create table POST /databases/{database-name}/tables interface
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1677">TAJO-1677</a>] - Remove unnecessary messages for the Travis CI build
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1695">TAJO-1695</a>] - Shuffle fetcher executor should be consider random writing
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1696">TAJO-1696</a>] - Resource calculator should consider the requested disk resource at the first stage
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1699">TAJO-1699</a>] - Tajo Java Client version 2
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1700">TAJO-1700</a>] - Add better exception handling in TajoMasterClientService
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1701">TAJO-1701</a>] - Remove forward or non-forward query concept in TajoClient
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1703">TAJO-1703</a>] - Remove hardcoded value in NodeStatusUpdater
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1715">TAJO-1715</a>] - Precompute the hash value of various kinds of ids
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1717">TAJO-1717</a>] - Parquet Update
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1721">TAJO-1721</a>] - Separate routine for CREATE TABLE from DDLExecutor
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1729">TAJO-1729</a>] - No handling of default case in DDLExecutor
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1736">TAJO-1736</a>] - Remove unnecessary getMountPath()
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1738">TAJO-1738</a>] - Improve off-heap RowBlock
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1743">TAJO-1743</a>] - Improve calculation of intermediate table statistics
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1745">TAJO-1745</a>] - Add positive and negative test methods
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1746">TAJO-1746</a>] - Improve resource usage at first request of DefaultTaskScheduler
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1751">TAJO-1751</a>] - Reduce the client connection timeout
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1757">TAJO-1757</a>] - Add examples for TajoClient v2
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1761">TAJO-1761</a>] - Separate an integration unit test kit into an independent module.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1766">TAJO-1766</a>] - Improve the performance of cross join
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1775">TAJO-1775</a>] - HCatalogStore need to be deprecated
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1780">TAJO-1780</a>] - QueryTestCaseBase should be instantized for each test class
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1792">TAJO-1792</a>] - tajo-cluster-tests is not available when it is used as an external maven module.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1810">TAJO-1810</a>] - Remove QueryMasterTask cache immediately, if it stored to persistent storage
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1814">TAJO-1814</a>] - Add some positive/negative tests for CREATE TABLE IF NOT EXISTS
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1816">TAJO-1816</a>] - Refactor SQL parser tests
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1817">TAJO-1817</a>] - Improve SQL parser error message
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1818">TAJO-1818</a>] - Separate sql parser into an independent maven module
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1825">TAJO-1825</a>] - Remove zero length fragments when file length is zero
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1828">TAJO-1828</a>] - tajo-daemon scripts should kill process after process can not stop gracefully
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1831">TAJO-1831</a>] - Add a shutdown hook manager in order to set priorities
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1847">TAJO-1847</a>] - Support Socket/Connection Timeout in Rpc
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1860">TAJO-1860</a>] - Refactor Rpc clients to take Connection Parameters
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1867">TAJO-1867</a>] - TajoMaster should handle the change of ${tajo.root}.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1868">TAJO-1868</a>] - Allow TablespaceManager::get to return unregistered tablespace
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1885">TAJO-1885</a>] - Simple query with projection should be supported
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1890">TAJO-1890</a>] - Clean up debug and test modes and unhandled exceptions
</li>
</ul>
<h2> New Feature
</h2>
<ul>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-29">TAJO-29</a>] - ORCFile integration
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1135">TAJO-1135</a>] - Implement queryable virtual table for cluster information
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1344">TAJO-1344</a>] - Python UDF support
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1421">TAJO-1421</a>] - Add 'ALTER TABLE SET PROPERTY' statement
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1430">TAJO-1430</a>] - Improve SQLAnalyzer by session-based parsing-result caching
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1486">TAJO-1486</a>] - Text file should support to skip header rows when creating external table
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1494">TAJO-1494</a>] - Add SeekableScanner support to DelimitedTextFileScanner
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1537">TAJO-1537</a>] - Implement a virtual table for sessions
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1562">TAJO-1562</a>] - Python UDAF support
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1661">TAJO-1661</a>] - Implement CORR function
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1730">TAJO-1730</a>] - JDBC Tablespace support
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1812">TAJO-1812</a>] - Timezone support in JSON file format
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1832">TAJO-1832</a>] - Well support for self-describing data formats
</li>
</ul>
<h2> Task
</h2>
<ul>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1076">TAJO-1076</a>] - Add start second worker documentation
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1273">TAJO-1273</a>] - Merge DirectRawFile to master branch
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1300">TAJO-1300</a>] - Merge the index branch into the master branch
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1314">TAJO-1314</a>] - Documentation for the support of the swift
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1380">TAJO-1380</a>] - Update JDBC documentation for new JDBC driver
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1424">TAJO-1424</a>] - Investigate the problem of too many "Try to connect" messeges during Travic CI build
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1439">TAJO-1439</a>] - Some method name is written wrongly
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1450">TAJO-1450</a>] - Encapsulate Datum in Tuple
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1482">TAJO-1482</a>] - Cleanup the legacy cluster mode
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1559">TAJO-1559</a>] - Fix data model description (tinyint, smallint)
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1567">TAJO-1567</a>] - Update old license in some pom.xml files
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1568">TAJO-1568</a>] - Apply UnpooledByteBufAllocator when a tajo.test.enabled is set to enable
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1575">TAJO-1575</a>] - HBASE_HOME guidance is duplicated in tajo-env.sh
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1583">TAJO-1583</a>] - Remove ServerCallable in RPC client
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1587">TAJO-1587</a>] - Upgrade java version to 1.7 for Travis CI
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1590">TAJO-1590</a>] - Moving to JDK 7
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1628">TAJO-1628</a>] - Add a document for join operation
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1682">TAJO-1682</a>] - Write ORC document
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1687">TAJO-1687</a>] - sphinx-mavan-plugin version should be 1.0.3
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1713">TAJO-1713</a>] - Change the type of edge cache in JoinGraphContext from HashMap to LRUMap
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1744">TAJO-1744</a>] - Porting bash shell scripts to Windows command shell scripts.
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1750">TAJO-1750</a>] - Upgrade hadoop dependency to 2.7.1
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1755">TAJO-1755</a>] - Add documentation for missing built-in functions
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1803">TAJO-1803</a>] - Use in-memory derby as the default catalog for unit tests
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1805">TAJO-1805</a>] - In the 'Execute Query' page of web UI, default database should be set as 'default'
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1809">TAJO-1809</a>] - Change default value of several configurations
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1813">TAJO-1813</a>] - Allow external catalog store for unit testing
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1833">TAJO-1833</a>] - Refine LogicalPlanPreprocessor to add new rules easily
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1845">TAJO-1845</a>] - Enforcers in the master plan should be printed in a fixed order
</li>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1872">TAJO-1872</a>] - Increase the minimum split size and add a classpath to hadoop tools
</li>
</ul>
<h2> Test
</h2>
<ul>
<li>[<a href="https://issues.apache.org/jira/browse/TAJO-1870">TAJO-1870</a>] - Enable tests of tajo-storage-pgsql module when arch type is 64-bit
</li>
</ul>
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