快速入門
本文主要通過示例為您介紹,如何快速使用E-MapReduce上的Doris集群進行基本的建表和查詢操作。
前提條件
已創(chuàng)建Doris集群,詳情請參見創(chuàng)建Doris集群。
使用示例
使用SSH方式登錄集群,詳情請參見登錄集群。
主節(jié)點的公網(wǎng)IP地址:需要您在新版控制臺節(jié)點管理頁簽的emr_master機器組下查看。
執(zhí)行以下命令,連接集群。
mysql -h127.0.0.1 -P 9031 -uroot
執(zhí)行以下命令,創(chuàng)建數(shù)據(jù)庫并選擇數(shù)據(jù)庫。
CREATE DATABASE IF NOT EXISTS load_test; USE load_test;
執(zhí)行以下命令,創(chuàng)建表。
CREATE TABLE insert_wiki_edit ( event_time DATETIME, channel VARCHAR(32) DEFAULT '', user VARCHAR(128) DEFAULT '', is_anonymous TINYINT DEFAULT '0', is_minor TINYINT DEFAULT '0', is_new TINYINT DEFAULT '0', is_robot TINYINT DEFAULT '0', is_unpatrolled TINYINT DEFAULT '0', delta INT SUM DEFAULT '0', added INT SUM DEFAULT '0', deleted INT SUM DEFAULT '0' ) AGGREGATE KEY(event_time, channel, user, is_anonymous, is_minor, is_new, is_robot, is_unpatrolled) PARTITION BY RANGE(event_time) ( PARTITION p06 VALUES LESS THAN ('2015-09-12 06:00:00'), PARTITION p12 VALUES LESS THAN ('2015-09-12 12:00:00'), PARTITION p18 VALUES LESS THAN ('2015-09-12 18:00:00'), PARTITION p24 VALUES LESS THAN ('2015-09-13 00:00:00') ) DISTRIBUTED BY HASH(user) BUCKETS 10 PROPERTIES("replication_num" = "1");
執(zhí)行以下命令,導(dǎo)入測試數(shù)據(jù)。
INSERT INTO insert_wiki_edit VALUES("2015-09-12 00:00:00","#en.wikipedia","GELongstreet",0,0,0,0,0,36,36,0),("2015-09-12 00:00:00","#ca.wikipedia","PereBot",0,1,0,1,0,17,17,0);
執(zhí)行以下命令,查詢數(shù)據(jù)。
select * from insert_wiki_edit;
返回信息如下所示。
+---------------------+---------------+--------------+--------------+----------+--------+----------+----------------+-------+-------+---------+ | event_time | channel | user | is_anonymous | is_minor | is_new | is_robot | is_unpatrolled | delta | added | deleted | +---------------------+---------------+--------------+--------------+----------+--------+----------+----------------+-------+-------+---------+ | 2015-09-12 00:00:00 | #en.wikipedia | GELongstreet | 0 | 0 | 0 | 0 | 0 | 36 | 36 | 0 | | 2015-09-12 00:00:00 | #ca.wikipedia | PereBot | 0 | 1 | 0 | 1 | 0 | 17 | 17 | 0 | +---------------------+---------------+--------------+--------------+----------+--------+----------+----------------+-------+-------+---------+ 2 rows in set (0.07 sec)
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