hive helper

Hive default metadata information is stored in Derby. Derby's built-in relational database and single session (only single client connection is supported, and an error will be reported when two clients are connected in the past ); Hive supports storing metadata in relational databases, such as MySQL and Oracle; In this case, the hive metadata is stored in MySQL.

In the previous articleArticleI listed a simple hive operation instance, created a table test, and loaded data to this table. These operations are similar to relational database operations, we often compare hive with relational databases because many knowledge points of hive are similar to those of relational databases. Relational databases also contain tables,

First, the Hive function1. Hive Built-in function(1) More content, see "Hive Official Documents"Https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF(2) Detailed explanation:Http://blog.sina.com.cn/s/blog_83bb57b70101lhmk.html(3) test the shortcut to the built-in function:1. Creating a dual Table CREATE t

This page contains more information about setting up and using the ODBC Connector hive. This page contains the following topics: Before you start the SQL Connector software and hardware requirements to install and configure authentication in DSN configuration SSL configuration DSN run SQLPrepare optimization Note data type HIVEQL notes in Application Note Microsoft Access Microsoft E Xcel/Query screen before the desktop starts The ODBC Connector for t

1. Installing hiveBefore installing hive, make sure that Hadoop is installed, if it is not installed, refer to Centoos install Hadoop cluster for installation;　　　1.1, download, unzipDownload hive2.1.1:http://mirror.bit.edu.cn/apache/hive/hive-2.1.1/apache-hive-2.1.1-bin.tar.gz;Unzip the downloaded

Hive index, hive 1. Hive index Overview Hive indexes aim to improve the query speed of specified columns in Hive tables. If no index exists, a query similar to 'where tab1.col1 = 10', Hive loads the entire table or partition and

The purpose of configuring hive and HBase integration is to use the HQL syntax to implement additions and deletions of hbase database, the basic principle is to use the API interface between them to communicate with each other, the communication is mainly dependent on the Hive_hbase-handler.jar tool class. Note, however, that using hive to manipulate tables in HBase simply provides convenience, as described

Ruchunli's work notes , who says programmers can't have a literary fan? Hive provides three service modes externally, the CLI (command line interface), Hive Web, and hive Client (such as JAVAAPI).1. Hive command line mode (CLI)There are two ways to start hive command-

Document directory Create Table ALTER TABLE Select Join Hive discussion (4)-hive QL Hive official documentation on the query language has a very detailed description, please refer to: http://wiki.apache.org/hadoop/Hive/LanguageManual, most of the content of this article translated from this page, some things need

This article summarizes the installation of hive + MySQL. Later, we will put some information about hive: 1. Installation objectives: Hive with remote MySQL 2. Summary: 1). MySQL Configuration: Assume that hive connects to MYSQL as a hive user and logs on to MYSQL as a root

Upgrade hive client and hive Client Article from: http://blog.csdn.net/lili72 Background: when using hive of the old version, some bugs often occur and cannot be solved. For example, you cannot find partitions in tables. Due to high concurrency, the following common exceptions are: Com. mysql. jdbc. exceptions. jdbc4.MySQLSyntaxErrorException: Table '

Label:Description: This document is translated/collated in Hive Official document https://cwiki.apache.org/confluence/display/Hive/SQL+Standard+Based+Hive+Authorization# Sqlstandardbasedhiveauthorization-objectprivilegecommands.status of authorization prior to Hive version 0.13 H