Hive执行流程-阿里云

Hive架构及Hive SQL的执行流程解读

1、Hive产生背景• MapReduce编程的不便性• HDFS上的文件缺少Schema(表名，名称，ID等，为数据库对象的集合)2、Hive是什么Hive的使用场景是什么？基于Hadoop做一些数据清洗啊（ETL）、报表啊、数据分析可以将结构化的数据文件映射为一张数据库表，并提供类SQL查询功能...

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hive执行流程(3)-Driver类分析1Driver类整体流程

Driver类是对 1 org.apache.hadoop.hive.ql.processors.CommandProcessor.java 接口的实现，重写了run方法，定义了常见sql的执行方式. 1 public class Driver implements&n...

hive执行流程(2)-CommandProcessor相关类

在上一篇的CliDriver 类中介绍了CliDriver 类会引用到CommandProcessor相关类，主要是根据命令来判断具体实现类,比如通过本地的hive cli启动时，运行hive的命令（非list/source/shell命令等）时在processCm...

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更新时间 2024-02-06 11:14:28

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开源大数据平台 E-MapReduce

开源大数据平台 E-MapReduce（简称“EMR”）是云原生开源大数据平台，向客户提供简单易集成的Hadoop、Hive、Spark、Flink、Presto、ClickHouse、StarRocks、Delta、Hudi等开源大数据计算和存储引擎服务。

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最佳实践

EMR实时计算实践