在使用Apache DolphinScheduler调度执行复杂的HiveSQL时，HQL包含多种海豚无法正确识别的符号，怎么办？本文提供了可行的思路和方法，供用户参考。
一、目的
在Hive中完成复杂JSON，既有对象还有数组而且数组中包含数组的解析后，原本以为没啥问题了，结果在DolphinScheduler中调度又出现了大问题，搞了一天。试了很多种方法，死了无数脑细胞，才解决了这个问题！
二、HiveSQL
insert overwrite table hurys_dc_dwd.dwd_json_statistics partition(day)
select
t1.device_no,
source_device_type,
sn,
model,
create_time,
cycle,
get_json_object(coil_list,'$.laneNo') lane_no,
get_json_object(coil_list,'$.laneType') lane_type,
section_no,
get_json_object(coil_list,'$.coilNo') coil_no,
get_json_object(coil_list,'$.volumeSum') volume_sum,
get_json_object(coil_list,'$.volumePerson') volume_person,
get_json_object(coil_list,'$.volumeCarNon') volume_car_non,
get_json_object(coil_list,'$.volumeCarSmall') volume_car_small,
get_json_object(coil_list,'$.volumeCarMiddle') volume_car_middle,
get_json_object(coil_list,'$.volumeCarBig') volume_car_big,
get_json_object(coil_list,'$.speedAvg') speed_avg,
get_json_object(coil_list,'$.speed85') speed_85,
get_json_object(coil_list,'$.timeOccupancy') time_occupancy,
get_json_object(coil_list,'$.averageHeadway') average_headway,
get_json_object(coil_list,'$.averageGap') average_gap,
substr(create_time,1,10) day
from (select
get_json_object(statistics_json,'$.deviceNo') device_no,
get_json_object(statistics_json,'$.sourceDeviceType') source_device_type,
get_json_object(statistics_json,'$.sn') sn,
get_json_object(statistics_json,'$.model') model,
get_json_object(statistics_json,'$.createTime') create_time ,
get_json_object(statistics_json,'$.data.cycle') cycle,
get_json_object(replace(replace(section_list,':{',':[{'),'}}','}]}'),'$.sectionNo') section_no,
section_list
from hurys_dc_ods.ods_statistics
lateral view explode(split(replace(replace(replace(get_json_object(statistics_json,'$.data.sectionList'),
'[',''),']',''),'},{"sectionNo"','}|{"sectionNo"'),"\\|")) tf as section_list
where day='2024-07-18' -- date_sub(current_date(), 1) -- '2024-07-18' --
) as t1
lateral view explode(split(replace(replace(replace(get_json_object(replace(replace(section_list,
':{',':[{'),'}}','}]}'),'$.coilList'),'[',''),']',''),'},','}|'),"\\|")) tf1 as coil_list
where substr(create_time,1,10) = '2024-07-18' --date_sub(current_date(), 1) --'2024-07-17'
;
三、原先海豚的任务调度方式
在shell脚本里添加HiveSQL语句
#! /bin/bash
source /etc/profile
nowdate=`date --date='0 days ago' "+%Y%m%d"`
yesdate=`date -d yesterday +%Y-%m-%d`
hive -e "
use hurys_dc_dwd;
set hive.vectorized.execution.enabled=false;
set hive.exec.dynamic.partition=true;
set hive.exec.dynamic.partition.mode=nonstrict;
set hive.exec.max.dynamic.partitions.pernode=1000;
set hive.exec.max.dynamic.partitions=1500;
with t1 as(
select
get_json_object(statistics_json,'$.deviceNo') device_no,
get_json_object(statistics_json,'$.sourceDeviceType') source_device_type,
get_json_object(statistics_json,'$.sn') sn,
get_json_object(statistics_json,'$.model') model,
get_json_object(statistics_json,'$.createTime') create_time ,
get_json_object(statistics_json,'$.data.cycle') cycle,
get_json_object(replace(replace(section_list,':{',':[{'),'}}','}]}'),'$.sectionNo') section_no,
section_list
from hurys_dc_ods.ods_statistics
lateral view explode(split(replace(replace(replace(get_json_object(statistics_json,'$.data.sectionList'),'[',''),']',''),'},{"sectionNo"','}|{"sectionNo"'),"\\\\|")) tf as section_list
where day='$yesdate'
)
insert overwrite table hurys_dc_dwd.dwd_json_statistics partition(day)
select
t1.device_no,
source_device_type,
sn,
model,
substr(create_time,1,19) create_time ,
cycle,
get_json_object(coil_list,'$.laneNo') lane_no,
get_json_object(coil_list,'$.laneType') lane_type,
section_no,
get_json_object(coil_list,'$.coilNo') coil_no,
get_json_object(coil_list,'$.volumeSum') volume_sum,
get_json_object(coil_list,'$.volumePerson') volume_person,
get_json_object(coil_list,'$.volumeCarNon') volume_car_non,
get_json_object(coil_list,'$.volumeCarSmall') volume_car_small,
get_json_object(coil_list,'$.volumeCarMiddle') volume_car_middle,
get_json_object(coil_list,'$.volumeCarBig') volume_car_big,
get_json_object(coil_list,'$.speedAvg') speed_avg,
get_json_object(coil_list,'$.speed85') speed_85,
get_json_object(coil_list,'$.timeOccupancy') time_occupancy,
get_json_object(coil_list,'$.averageHeadway') average_headway,
get_json_object(coil_list,'$.averageGap') average_gap,
substr(create_time,1,10) day
from t1
lateral view explode(split(replace(replace(replace(get_json_object(replace(replace(section_list,':{',':[{'),'}}','}]}'),'$.coilList'),'[',''),']',''),'},','}|'),"\\\\|")) tf1 as coil_list
where substr(create_time,1,10) ='$yesdate'
"
四、原先方式报错日志
DolphinScheduler无法正确识别HiveSQL里解析复杂JSON的多种符号。
五、解决方式
把HiveSQL放在一个SQL文件里，然后在脚本里是执行Hive的sourceSQL文件。
1 SQL文件
--使用hurys_dc_ods数据库 use hurys_dc_dwd;
--hive调优（必须先执行调优语句，否则部分复杂SQL运行会有问题） set hive.vectorized.execution.enabled=false; --开启动态分区功能（默认 true，开启） set hive.exec.dynamic.partition=true; --设置为非严格模式 nonstrict 模式表示允许所有的分区字段都可以使用动态分区 set hive.exec.dynamic.partition.mode=nonstrict; --在每个执行 MR 的节点上，最大可以创建多少个动态分区 set hive.exec.max.dynamic.partitions.pernode=1000; --在所有执行 MR 的节点上，最大一共可以创建多少个动态分区。默认 1000 set hive.exec.max.dynamic.partitions=1500;
insert overwrite table hurys_dc_dwd.dwd_json_statistics partition(day)
select
t1.device_no,
source_device_type,
sn,
model,
create_time,
cycle,
get_json_object(coil_list,'$.laneNo') lane_no,
get_json_object(coil_list,'$.laneType') lane_type,
section_no,
get_json_object(coil_list,'$.coilNo') coil_no,
get_json_object(coil_list,'$.volumeSum') volume_sum,
get_json_object(coil_list,'$.volumePerson') volume_person,
get_json_object(coil_list,'$.volumeCarNon') volume_car_non,
get_json_object(coil_list,'$.volumeCarSmall') volume_car_small,
get_json_object(coil_list,'$.volumeCarMiddle') volume_car_middle,
get_json_object(coil_list,'$.volumeCarBig') volume_car_big,
get_json_object(coil_list,'$.speedAvg') speed_avg,
get_json_object(coil_list,'$.speed85') speed_85,
get_json_object(coil_list,'$.timeOccupancy') time_occupancy,
get_json_object(coil_list,'$.averageHeadway') average_headway,
get_json_object(coil_list,'$.averageGap') average_gap,
substr(create_time,1,10) day
from (select
get_json_object(statistics_json,'$.deviceNo') device_no,
get_json_object(statistics_json,'$.sourceDeviceType') source_device_type,
get_json_object(statistics_json,'$.sn') sn,
get_json_object(statistics_json,'$.model') model,
get_json_object(statistics_json,'$.createTime') create_time ,
get_json_object(statistics_json,'$.data.cycle') cycle,
get_json_object(replace(replace(section_list,':{',':[{'),'}}','}]}'),'$.sectionNo') section_no,
section_list
from hurys_dc_ods.ods_statistics
lateral view explode(split(replace(replace(replace(get_json_object(statistics_json,'$.data.sectionList'),'[',''),']',''),'},{"sectionNo"','}|{"sectionNo"'),"\\|")) tf as section_list
where day= date_sub(current_date(), 1)
) as t1
lateral view explode(split(replace(replace(replace(get_json_object(replace(replace(section_list,':{',':[{'),'}}','}]}'),'$.coilList'),'[',''),']',''),'},','}|'),"\\|")) tf1 as coil_list
where substr(create_time,1,10) = date_sub(current_date(), 1)
;
2 海豚任务执行脚本
#! /bin/bash
source /etc/profile
nowdate=`date --date='0 days ago' "+%Y-%m-%d"`
yesdate=`date -d yesterday +%Y-%m-%d`
hive -e "
source dwd_json_statistics.sql
"
3 执行任务，验证结果
终于解决了！以后碰到类似调度器识别不了SQL里符号的问题，可以用这个方法，把SQL放在SQL文件里，然后在脚本里执行这个SQL文件，这样就能规避这类问题了。
转载自天地风雷水火山泽 原文链接：https://blog.csdn.net/tiantang2renjian/article/details/140605840
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