Hive Beeline 官方文档学习
Posted LarryZeal
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Beeline 是什么?
它是一个命令行形式的jdbc客户端。搞Java开发的同学,看到这里就应该知道这货是什么了 ── 它是一个连接数据库的工具。
只不过Beeline连接的数据库是HiveServer2。
Beeline 有两种工作模式:内嵌、远程。
内嵌模式中,会运行一个内嵌的Hive(类似于Hive CLI)。
远程模式中,通过Thrift协议连接到一个不同的HiveServer2。从Hive 0.14起,Beeline连接HiveServer2 时,还会将HiveServer2 执行查询的日志信息输出到STDERR。
-- 推荐在生产中使用远程模式,因为更安全,且无需 HDFS/metastore 的访问授权。
注意,在远程模式下,HiveServer2 只接受有效的Thrift 请求 -- 就算是在HTTP模式中,消息体也需要包含Thrift payload。
Beeline 的使用示例
[[email protected] ~]# beeline Beeline version 1.1.0-cdh5.6.0 by Apache Hive beeline> help !all Execute the specified SQL against all the current connections !autocommit Set autocommit mode on or off !batch Start or execute a batch of statements !brief Set verbose mode off !call Execute a callable statement !close Close the current connection to the database !closeall Close all current open connections !columns List all the columns for the specified table !commit Commit the current transaction (if autocommit is off) !connect Open a new connection to the database. !dbinfo Give metadata information about the database !describe Describe a table !dropall Drop all tables in the current database !exportedkeys List all the exported keys for the specified table !go Select the current connection !help Print a summary of command usage !history Display the command history !importedkeys List all the imported keys for the specified table !indexes List all the indexes for the specified table !isolation Set the transaction isolation for this connection !list List the current connections !manual Display the BeeLine manual !metadata Obtain metadata information !nativesql Show the native SQL for the specified statement !nullemptystring Set to true to get historic behavior of printing null as empty string. Default is false. !outputformat Set the output format for displaying results (table,vertical,csv2,dsv,tsv2,xmlattrs,xmlelements, and deprecated formats(csv, tsv)) !primarykeys List all the primary keys for the specified table !procedures List all the procedures !properties Connect to the database specified in the properties file(s) !quit Exits the program !reconnect Reconnect to the database !record Record all output to the specified file !rehash Fetch table and column names for command completion !rollback Roll back the current transaction (if autocommit is off) !run Run a script from the specified file !save Save the current variabes and aliases !scan Scan for installed JDBC drivers !script Start saving a script to a file !set Set a beeline variable !sh Execute a shell command !sql Execute a SQL command !tables List all the tables in the database !typeinfo Display the type map for the current connection !verbose Set verbose mode on Comments, bug reports, and patches go to ??? beeline> !connect jdbc:hive2://localhost:10000 beeline> !tables; No current connection beeline> !connect jdbc:hive2://elephant:10000 scan complete in 2ms Connecting to jdbc:hive2://elephant:10000 Enter username for jdbc:hive2://elephant:10000: hive Enter password for jdbc:hive2://elephant:10000: ********** Connected to: Apache Hive (version 1.1.0-cdh5.6.0) Driver: Hive JDBC (version 1.1.0-cdh5.6.0) Transaction isolation: TRANSACTION_REPEATABLE_READ 0: jdbc:hive2://elephant:10000>
上面,通过help查询了Beeline 支持的命令,又通过 !connect jdbc:hive2://elephant:10000 连接到 elephant主机上的HiveServer2。
下面就来看看还能执行什么操作。
参考:
https://cwiki.apache.org//confluence/display/Hive/HiveServer2+Clients
http://blog.csdn.net/huanggang028/article/details/44591663
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