Disclaimer Prerequisites Users, Groups, and Roles Names of Users and Roles Creating/Dropping/Using Roles Create/Drop Role Grant/Revoke Roles Viewing Granted Roles Privileges Grant/Revoke Privileges Viewing Granted Privileges Hive Operations and Requi…

Hive Concurrency Model Hive Concurrency Model Use Cases Turn Off Concurrency Debugging Configuration Locking in Hive Transactions Use Cases Concurrency support (http://issues.apache.org/jira/browse/HIVE-1293) is a must in databases and their use case…

Hive Operators and User-Defined Functions (UDFs) Hive Operators and User-Defined Functions (UDFs) Built-in Operators Relational Operators Arithmetic Operators Logical Operators Complex Type Constructors Operators on Complex Types Built-in Functions M…

Create/Drop/Grant/Revoke Roles and Privileges Hive Default Authorization - Legacy Mode has information about these DDL statements: CREATE ROLE GRANT ROLE REVOKE ROLE GRANT privilege_type REVOKE privilege_type DROP ROLE SHOW ROLE GRANT SHOW GRANT For …

Status of Hive Authorization before Hive 0.13 SQL Standards Based Hive Authorization (New in Hive 0.13) Restrictions on Hive Commands and Statements Privileges Objects Object Ownership Users and Roles Names of Users and Roles Role Management Commands…

Hive Joins Hive Joins Join Syntax Examples MapJoin Restrictions Join Optimization Predicate Pushdown in Outer Joins Enhancements in Hive Version 0.11 Join Syntax Hive supports the following syntax for joining tables: join_table:     table_reference J…

Archiving for File Count Reduction Note: Archiving should be considered an advanced command due to the caveats involved. Archiving for File Count Reduction Overview Settings Usage Archive Unarchive Cautions and Limitations Under the Hood Overview Due…

error: java.sql.SQLException: No suitable driver found for jdbc:hive://localhost:10000/default at java.sql.DriverManager.getConnection(DriverManager.java:) at java.sql.DriverManager.getConnection(DriverManager.java:) at demo.utils.JDBCUtils.getConnec…

本博文的主要内容如下: Hive文件存储格式 Hive 操作之表操作:创建外.内部表 Hive操作之表操作:表查询 Hive操作之表操作:数据加载 Hive操作之表操作:插入单表.插入多表 Hive语法结构:where 查询.all 和 distinct 选项.基于 Partition 的查询.基于 HAVING 的查询. LIMIT 限制查询. GROUP BY 分组查询. ORDER  BY 排序查询.SORT BY 查询.DISTRIBUTE BY 排序查询.CLUSTER BY 查询 H…

Hive 是基于Hadoop 构建的一套数据仓库分析系统,它提供了丰富的SQL查询方式来分析存储在Hadoop 分布式文件系统中的数据,可以将结构 化的数据文件映射为一张数据库表,并提供完整的SQL查询功能,可以将SQL语句转换为MapReduce任务进行运行,通过自己的SQL 去查询分析需 要的内容,这套SQL 简称Hive SQL,使不熟悉mapreduce 的用户很方便的利用SQL 语言查询,汇总,分析数据.而mapreduce开发人员可以把 己写的mapper 和reducer 作为插件…