SerDe即序列化和反序列化,JSONSerDe基本思想是使用json.org的JSON库,使用这个库可以读取一行数据并解析为JSONObject,然后解析到Hive中的数据行。因此JSON文件的每行必须是一个完整的JSON,一个JSON不能跨越多行。本文档介绍的是JsonSerDe,该库的地址为:https://github.com/rcongiu/Hive-JSON-Serde。它的特点如下...
https://github.com/rcongiu/Hive-JSON-Serde jar包下载地址 http://www.congiu.net/hive-json-serde 将下载好的jar包上传到hive的lib目录下 创建表 create table employees(name string,salary int) " row format serde 'org.openx.data.jsonserde.JsonSerDe' stored as...
http://www.congiu.net/hive-json-serde/ 如果要想在Hive中使用JsonSerde,需要把jar添加到Hive类路径中: addjar json-serde-1.3.7-jar-with-dependencies.jar; 3. 与数组使用 源数据: {"country":"Switzerland","languages":["German","French","Italian"]} {"country":"China","languages":["chinese...
org.openx.data.jsonserde.JsonSerDe下载地址:https://github.com/rcongiu/Hive-JSON-Serde 测试demo下载地址:https://github.com/ttting/hive-jsonserde-demo
1、将下载的json-serde-1.3.8-jar-with-dependencies.jar包放到hive的lib⽬录下 2、配置hive-site.xml⽂件，添加jar包的声明，永久注册 <property> <name>hive.aux.jars.path</name> <value>file:///soft/hive/lib/json-serde-1.3.8-jar-with-dependencies.jar</value> </property> 3、设置不...
CREATE TABLE json_test1 ( one boolean, three array<string>, two double, four string ) ROW FORMAT SERDE 'org.openx.data.jsonserde.JsonSerDe' STORED AS TEXTFILE; LOAD DATA LOCAL INPATH 'data.txt' OVERWRITE INTO TABLE json_test1 ; hive> select three[1] from json_test1; gold yellow If...
Loading a JSON File and Querying Data Usesjson-serde/src/test/scripts/test-without-cr-lf.json. ~$ cat test.json {"text":"foo","number":123} {"text":"bar","number":345} $ hadoop fs -put -f test.json /user/data/test.json $ hive hive> CREATE DATABASE test; hive> CREATE EXTER...
com.amazonaws.services.kinesisfirehose.model.HiveJsonSerDe All Implemented Interfaces: StructuredPojo, Serializable, Cloneable @Generated(value="com.amazonaws:aws-java-sdk-code-generator") public class HiveJsonSerDe extends Object implements Serializable, Cloneable, StructuredPojo The native Hive / HCat...
The JsonSerDe for JSON files is available inHive 0.12and later. Starting in Hive 3.0.0, JsonSerDe is added to Hive Serde as "org.apache.hadoop.hive.serde2.JsonSerDe" (HIVE-19211). CREATETABLEmy_table(a string, b ``bigint``, ...) ...
首先在自己电脑上部署HADOOP,HIVE环境。下载hive和Hive-JSON-Serde,链接:https://github.com/apache/hivehttps://github.com/rcongiu/Hive-JSON-Serde确保可以运行起来。然后就要做好以下准备: 1.找到hive运行时打印的log的位置。如果没有配置如下属性,那就是默认位置: ...