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蟆曙 Hortonworks Sandbox. HDP 2.6(谿瑚: VirtualBox Hortonworks Sandbox 蠍)

json string hive襦 譯朱朱覺る.

[{"product_id":220003038067,"timestamps":"1340321132000"},{"product_id":300003861266,"timestamps":"1340271857000"}]

~. 襷 蟇一螳.
get_json_object, json_tuple企朱 螳 讌襷, 螳 json る蠍 れ.
蟲蠍 谿場覲企 UDF襦 願屋螻 朱, れ UDF襯 谿場.

jar 殊 . 覃企朱 觜襯 伎 , 覃企 る 覲語 覯 .
.

maven れ
  1. http://maven.apache.org/download.cgi れ企
  2. d:\apache-maven-3.5.0 .
  3. MAVEN_HOME, JAVA_HOME 蟆暑 れ
    MAVEN_HOME = d:\apache-maven-3.5.0
    JAVA_HOME = C:\Program Files\Java\jdk1.8.0_111

udf 觜
  1. https://github.com/pythian/hive-json-split れ企
  2. d:\hive-json-split-master .

    d:
    cd hive-json-split-master
    D:\apache-maven-3.5.0\bin\mvn package
     
maven_build.png
-- 豌 覯讌 觜 ろ. 轟 JAVA_HOME れ 伎 苦 蟆暑 れ 伎が 炎概.
-- JsonSplit-1.3-SNAPSHOT.jar

觜螳 炎概螻 target企朱 襴螳 蠍郁, 螳 jar 2螳螳 蠍磯.
jar_files.png

WinSCP襯 伎 hive螳 願 覯 JAR 2螳襯 /usr/hdp/current/hive-client/lib/ 覲旧 hive CLI れ 覈
add jar /usr/hdp/current/hive-client/lib/JsonSplit-1.3-SNAPSHOT.jar;
create function json_split as 'com.pythian.hive.udf.JsonSplitUDF';
create function json_map as 'com.pythian.hive.udf.JsonMapUDF';

json test
create table json_test(json_string string);
insert into json_test values('[{"product_id":220003038067,"timestamps":"1340321132000"},{"product_id":300003861266,"timestamps":"1340271857000"}]');

set hive.cli.print.header=true;
select 
    b.col.row_id
,   b.col.json_string
,   c.*
from json_test a
    lateral view explode(json_split(json_string)) b
    lateral view json_tuple(b.col.json_string, 'product_id', 'timestamps') c as product_id, timestamps;

[root@sandbox ~]# hive
log4j:WARN No such property [maxFileSize] in org.apache.log4j.DailyRollingFileAppender.

Logging initialized using configuration in file:/etc/hive/2.6.1.0-129/0/hive-log4j.properties
hive> set hive.cli.print.header=true;
hive> select
    >     b.col.row_id
    > ,   b.col.json_string
    > ,   c.*
    > from json_test a
    >     lateral view outer explode(json_split(json_string)) b
    >     lateral view json_tuple(b.col.json_string, 'product_id', 'timestamps') c as product_id, timestamps;
OK
row_id  json_string     c.product_id    c.timestamps
0       {"product_id":220003038067,"timestamps":"1340321132000"}        220003038067    1340321132000
1       {"product_id":300003861266,"timestamps":"1340271857000"}        300003861266    1340271857000
Time taken: 2.067 seconds, Fetched: 2 row(s)
hive>

UDF覲企 譬 襭 谿場朱, UDF襷 蟆 る 蟆磯 視 5螳 蟇碁碁.


語 企襷 add jar /usr/hdp/current/hive-client/lib/JsonSplit-1.3-SNAPSHOT.jar;襯 伎狩蟾 permanent function 襷 蟆 譬蟆.

hdfs jar 殊 襴螻
hadoop fs -put JsonSplit-1.3-SNAPSHOT.jar ;

hive ..
create function json_split as 'com.pythian.hive.udf.JsonSplitUDF' using JAR 'hdfs://localhost:8020/user/cloudera/JsonSplit-1.3-SNAPSHOT.jar';
create function json_map as 'com.pythian.hive.udf.JsonMapUDF' using JAR 'hdfs://localhost:8020/user/cloudera/JsonSplit-1.3-SNAPSHOT.jar';

os ..
sudo service hive-server2 restart

json_map 螳 襾豪.
--願唄 sql server openjson螻 
select explode(json_map(json_string))
from json_test 

select json_map(json_string)['product_id']
from json_test 


https://github.com/klout/brickhouse -- 伎 2018-03-04 13:31:33


https://github.com/klout/brickhouse -- 伎 2018-06-08 13:11:58
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