mongodb源表到hive表的同步

mongodb源表--->group3_mongo.appbehaviorpoint(hive) --->ods.appbehaviorpoint(hive)

group3_mongo.appbehaviorpoint 只是个mongodb到hive的映射

ods.appbehaviorpoint 才是真正的同步目标表

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1.如果mongodb源表增加了字段,那么group3_mongo.appbehaviorpoint 需要先drop table 才行,然后再执行建表语句。

一.
drop table group3_mongo.appBehaviorPoint;
二.
create external table group3_mongo.appBehaviorPoint
(
    `_id` string,
    track_id string,
    anonymous_id string,
    distinct_id string,
    event string,
    type string,
    time string,
    app_id string,
    app_name string,
    app_version string,
    device_id string,
    is_first_day string,
    lib string,
    element_type string,
    lib_method string,
    lib_version string,
    manufacturer string,
    model string,
    network_type string,
    os string,
    longitude string,
    latitude string,
    os_version string,
    element_content string,
    screen_height string,
    screen_width string,
    timezone_offset int,
    wifi string,
    title string,
    login_id string,
    screen_name string,
    ip string,
    province string,
    city string,
    `_class` string,
    is_first_time string,
    resume_from_background string,
    url string,
    event_duration string,
    referrer string,
    carrier string,
    element_id string,
	  download string,
	  is_h5 string,
    vcProductName string,
	  vcProductCode string,
	  duserAmount bigint,
	  lower_channel_code string,
    iinterfaceMode string,  --2022/01/07 add
    channel string,         --2022/01/07 add
    rydSpreadUV string      --2022/01/07 add

)
STORED BY 'com.mongodb.hadoop.hive.MongoStorageHandler'
WITH SERDEPROPERTIES('mongo.columns.mapping'='{"_id":"_id","track_id":"track_id","anonymous_id":"anonymous_id",
"distinct_id":"distinct_id","event":"event","type":"type","time":"time","app_id":"app_id","app_name":"app_name",
"app_version":"app_version","device_id":"device_id","is_first_day":"is_first_day","lib":"lib","element_type":"element_type",
"lib_method":"lib_method","lib_version":"lib_version","manufacturer":"manufacturer","model":"model","network_type":"network_type",
"os":"os","longitude":"longitude","latitude":"latitude","os_version":"os_version","element_content":"element_content",
"screen_height":"screen_height","screen_width":"screen_width","timezone_offset":"timezone_offset","wifi":"wifi","title":"title",
"login_id":"login_id","screen_name":"screen_name","ip":"ip","province":"province", "city":"city","_class":"_class",
"is_first_time":"is_first_time","resume_from_background":"resume_from_background","url":"url","event_duration":"event_duration",
"referrer":"referrer","carrier":"carrier","element_id":"element_id","download":"download","is_h5":"is_h5",
"vcProductName":"vcProductName","vcProductCode":"vcProductCode","duserAmount":"duserAmount",
"lower_channel_code":"lower_channel_code","iinterfaceMode":"iinterfaceMode","channel":"channel","rydSpreadUV":"rydSpreadUV"}')
----- 这里需要用MonGODB 数据库的地址和 数据库名称 和集合名称
TBLPROPERTIES('mongo.uri'='mongodb://risk_hive:5mmTrKKwo@dds-bpxxxxxxxxxxxxx-pub.mongodb.rds.aliyuncs.com:3717/db_name.tablename');

2. 增加字段和其他

ods表增加字段 ----- 
ALTER TABLE ods.appbehaviorpoint_minutes ADD COLUMNS(`iinterfaceMode` string); ALTER TABLE ods.appbehaviorpoint_minutes ADD COLUMNS(`channel` string); 
ALTER TABLE ods.appbehaviorpoint_minutes ADD COLUMNS(`rydSpreadUV` string);
 -----如果类型写错,用这条语句修改, 字段名要出现2次。 
ALTER TABLE ods.appbehaviorpoint CHANGE channel channel string; 
----查看表有那些字段 describe group3_mongo.appbehaviorpoint_minutes;

3.删除ods的要插入的分区【一定要执行此步骤，否则执行第4步插入数据后新加入的字段里面全是NULL】

如果要往20220107分区里面插入数据,需要先删除此分区 然后再执行第4步 
alter table ods.appbehaviorpoint_minutes drop partition (dt = '20220107')

4.执行插入语句 group3_mongodb--->ods

set mongo.input.split.create_input_splits=false; 
insert overwrite table ods.appbehaviorpoint PARTITION ( dt = '20220107') 
select * from group3_mongo.appbehaviorpoint 
-- where to_date(time) < '2022-01-07';