hive wikipedia

The integration of hive and hbase is to use their own external API interface to communicate with each other, communication is mainly dependent on hive-hbase-handler.jar tools; hive-hbase-handler.jar in the hive lib package instead of in hbase Lib, hive0.6 version later; Create an hbase table when creating a

The premise of integrating hive is that the Apache Hadoop cluster can start normally.Hadoop version apach2.6.0 hive version: 1.2.11. Install MySQL and give permissions:1.1: Create hive user and password:Create user ' hive ' identified by ' 123456 '1.2: Create the database: creates the databases

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 date functions, Hive date functions1. unix timestamp to Time Function Syntax: from_unixtime (bigint unixtime [, string format]) Return Value: string Description: converts a UNIX timestamp (from 00:00:00 UTC to the specified time in seconds) to the current time zone for example: hive> select from_unixtime (1323308943, 'yyyymmdd') from dual; 201112082. Obtain

I've described two ways in which hive imports analysis results into MySQL tables, respectively: Sqoop import and Using hive, MySQL JDBC driver, now I'm going to introduce a third, and use a lot more ways--using hive custom Functions ( UDF or genericudf) inserts each record into a database table.First, using the UDF methodUsing UDF is a simple implementation, as

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

Opening Remarks: Hive and HBase integration function is to use their own external API interface communication, mutual communication is mainly rely on hive_hbase-handler.jar tool class (HiveStorageHandlers: there is still some interest in hive_hbase-handler.jar this stuff, free to grind. Opening Remarks: Hive and HBase integration function is to use their own external API interface communication, mutual comm

Business backgroundThe EXTRACT_TRFC_PAGE_KPI hive SQL is as follows: set Mapred.job.queue.name=pms; set hive. exec. reducers. Max=8; Set mapred.reduce.tasks=8; set mapred.job.name=extract_trfc_page_kpi;InsertOverwriteTablePMS.EXTRACT_TRFC_PAGE_KPI Partition (ds=' $yesterday ')Select distinctPAGE_TYPE_ID, PV, UV,' $yesterday 'Update_time from(--For PC, H5SelectPAGE_TYPE_ID,sum(PV) asPvsum(UV) asUv fromDw.rpt

-interactive: Build Table:Enter data:Inquire:2, Interactive: Build table: Enter data: Query 1: Query 2: Second, grammar analysis: (English part from Wikipedia Hive languagemanual DML) 1. Loading file import table (Loading files into tables) Hive does not does any transformation while loading data into tables. The Load operations are currently pure copy/move o

The parameters in hive are divided into three categories, the first system environment variable information, the environment variable information, the second is ENV environment variable information, is the current user environment variable information; The third is the hive parameter variable information, is the environment variable information defined by the Hive