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Hive 1.0 正式版发布，数据仓库平台

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Apache Hive 1.0.0 正式发布了。该版本原本是要命名为 Hive 0.14.1，但是团队感觉到了该用 1.x.y 的方式命名的时候了。不过该版本改变的内容并不多，值得关注的有两个：

为 HiveMetaStoreClient 定义 API
移除 HiveServer 1，全面使用 HiveServer 2

Hive 1.0 版本完整的改进记录包括：

Bug

[ HIVE-5631 ] - Index creation on a skew table fails
[ HIVE-5664 ] - Drop cascade database fails when the db has any tables with indexes
[ HIVE-6198 ] - ORC file and struct column names are case sensitive
[ HIVE-6468 ] - HS2 & Metastore using SASL out of memory error when curl sends a get request
[ HIVE-7270 ] - SerDe Properties are not considered by show create table Command
[ HIVE-8099 ] - IN operator for partition column fails when the partition column type is DATE
[ HIVE-8295 ] - Add batch retrieve partition objects for metastore direct sql
[ HIVE-8374 ] - schematool fails on Postgres versions < 9.2
[ HIVE-8485 ] - HMS on Oracle incompatibility
[ HIVE-8706 ] - Table statistic collection on counter failed due to table name character case.
[ HIVE-8715 ] - Hive 14 upgrade scripts can fail for statistics if database was created using auto-create
[ HIVE-8739 ] - handle Derby and Oracle errors with joins and filters in Direct SQL in a invalid-DB-specific path
[ HIVE-8784 ] - Querying partition does not work with JDO enabled against PostgreSQL
[ HIVE-8805 ] - CBO skipped due to SemanticException: Line 0:-1 Both left and right aliases encountered in JOIN 'avg_cs_ext_discount_amt'
[ HIVE-8807 ] - Obsolete default values in webhcat-default.xml
[ HIVE-8811 ] - Dynamic partition pruning can result in NPE during query compilation
[ HIVE-8827 ] - Remove SSLv2Hello from list of disabled protocols
[ HIVE-8830 ] - hcatalog process don't exit because of non daemon thread
[ HIVE-8845 ] - Switch to Tez 0.5.2
[ HIVE-8866 ] - Vectorization on partitioned table throws ArrayIndexOutOfBoundsException when partitions are not of same #of columns
[ HIVE-8870 ] - errors when selecting a struct field within an array from ORC based tables
[ HIVE-8873 ] - Switch to calcite 0.9.2
[ HIVE-8876 ] - incorrect upgrade script for Oracle (13->14)
[ HIVE-8880 ] - non-synchronized access to split list in OrcInputFormat
[ HIVE-8886 ] - Some Vectorized String CONCAT expressions result in runtime error Vectorization: Unsuported vector output type: StringGroup
[ HIVE-8888 ] - Mapjoin with LateralViewJoin generates wrong plan in Tez
[ HIVE-8947 ] - HIVE-8876 also affects Postgres < 9.2
[ HIVE-8966 ] - Delta files created by hive hcatalog streaming cannot be compacted
[ HIVE-9003 ] - Vectorized IF expr broken for the scalar and scalar case
[ HIVE-9025 ] - join38.q (without map join) produces incorrect result when testing with multiple reducers
[ HIVE-9038 ] - Join tests fail on Tez
[ HIVE-9051 ] - TezJobMonitor in-place updates logs too often to logfile
[ HIVE-9053 ] - select constant in union all followed by group by gives wrong result
[ HIVE-9067 ] - OrcFileMergeOperator may create merge file that does not match properties of input files
[ HIVE-9090 ] - Rename "Tez File Merge Work" to smaller name
[ HIVE-9108 ] - Fix for HIVE-8735 is incorrect (stats with long paths)
[ HIVE-9111 ] - Potential NPE in OrcStruct for list and map types
[ HIVE-9112 ] - Query may generate different results depending on the number of reducers
[ HIVE-9114 ] - union all query in cbo test has undefined ordering
[ HIVE-9126 ] - Backport HIVE-8827 (Remove SSLv2Hello from list of disabled protocols) to 0.14 branch
[ HIVE-9141 ] - HiveOnTez: mix of union all, distinct, group by generates error
[ HIVE-9155 ] - HIVE_LOCKS uses int instead of bigint hive-txn-schema-0.14.0.mssql.sql
[ HIVE-9162 ] - stats19 test is environment-dependant
[ HIVE-9166 ] - Place an upper bound for SARG CNF conversion
[ HIVE-9168 ] - Vectorized Coalesce for strings is broken
[ HIVE-9205 ] - Change default tez install directory to use /tmp instead of /user and create the directory if it does not exist
[ HIVE-9234 ] - HiveServer2 leaks FileSystem objects in FileSystem.CACHE
[ HIVE-9249 ] - java.lang.ClassCastException: org.apache.hadoop.hive.serde2.io.HiveVarcharWritable cannot be cast to org.apache.hadoop.hive.common.type.HiveVarchar when joining tables
[ HIVE-9278 ] - Cached expression feature broken in one case
[ HIVE-9317 ] - move Microsoft copyright to NOTICE file
[ HIVE-9359 ] - Export of a large table causes OOM in Metastore and Client
[ HIVE-9361 ] - Intermittent NPE in SessionHiveMetaStoreClient.alterTempTable
[ HIVE-9390 ] - Enhance retry logic wrt DB access in TxnHandler
[ HIVE-9401 ] - Backport: Fastpath for limited fetches from unpartitioned tables
[ HIVE-9404 ] - NPE in org.apache.hadoop.hive.metastore.txn.TxnHandler.determineDatabaseProduct()
[ HIVE-9436 ] - RetryingMetaStoreClient does not retry JDOExceptions
[ HIVE-9473 ] - sql std auth should disallow built-in udfs that allow any java methods to be called
[ HIVE-9514 ] - schematool is broken in hive 1.0.0