数仓面试之手写拉链表SQL，并分析有多少个job

拉链表定义

维护历史状态，以及最新状态数据的一种表，拉链表根据拉链粒度的不同，实际上相当于快照，只不过做了优化，去除了一部分不变的记录而已,通过拉链表可以很方便的还原出拉链时点的客户记录。

拉链表，记录每条信息的生命周期，一旦一条记录的生命周期结束，就重新开始一条新的记录，并把当前日期放入生效开始日期。
如果当前信息至今有效，在生效结束日期中填入一个极大值 (如9999-99-99 )

用户表

用户表中的数据每日既有可能新增，也有可能修改，但修改频率并不高，属于缓慢变化维度，此处采用拉链表存储用户维度数据。

拉链表实现原理

第一步：比如在2020-01-01这一天，我们初始化用户数据到数据仓库user表，user表包含start_time和end_time字段用来标识该条数据的生命周期，明细数据如下所示。

在这里插入图片描述

第二步：在2020-01-02这一天，104用户被删除，同时增加了106和107用户，103用户的名称改成了小吴，明细数据如下所示。

在这里插入图片描述

第三步：在2020-01-03这一天，107用户被删除，同时106用户名称改为八王爷，103用户名称改为吴王，并增加了108用户，明细数据如下所示。

在这里插入图片描述

拉链表使用场景

数据量有点大，表中某些字段有变化，但是变化的频率不是很高（数据缓慢变化），业务需求又需要统计这种变化状态。但每天全量一份数据，有点不太现实，不仅浪费了存储空间，有时可能业务统计也有点麻烦。这时，拉链表的作用就体现出来了，既节省空间，又满足了需求。比如用户表，用户量1亿，一年365天，每天存储一份全量用户数据，效率非常低，此时就可以使用用户拉链表。

拉链表实现步骤

在这里插入图片描述

每日更新（下面截图取自尚硅谷）

在这里插入图片描述

原始业主用户表

DROP TABLE IF EXISTS ods_user_info;
CREATE EXTERNAL TABLE ods_user_info(
    `id` STRING COMMENT '用户id',
    `login_name` STRING COMMENT '用户名称',
    `nick_name` STRING COMMENT '用户昵称',
    `name` STRING COMMENT '用户姓名',
    `phone_num` STRING COMMENT '手机号码',
    `email` STRING COMMENT '邮箱',
    `user_level` STRING COMMENT '用户等级',
    `birthday` STRING COMMENT '生日',
    `gender` STRING COMMENT '性别',
    `create_time` STRING COMMENT '创建时间',
    `operate_time` STRING COMMENT '操作时间'
) COMMENT '用户表'
PARTITIONED BY (`dt` STRING)
ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t';

模拟数据：

ALTER TABLE ods_user_info DROP  PARTITION (dt='2020-06-14');
INSERT INTO ods_user_info PARTITION (dt='2020-06-14')(id, login_name, nick_name, name, phone_num, email, user_level, birthday, gender, create_time, operate_time)
VALUES (1, 'user1', 'nick1', '张三', '13800138000', 'zhangsan@example.com', 1, '2000-01-01', '男', '2020-06-14', '2020-06-14');

INSERT INTO ods_user_info PARTITION (dt='2020-06-14')(id, login_name, nick_name, name, phone_num, email, user_level, birthday, gender, create_time, operate_time)
VALUES (2, 'user2', 'nick2', '李四', '13900139000', 'lisi@example.com', 2, '2001-01-01', '女', '2020-06-14', '2020-06-14');

INSERT INTO ods_user_info PARTITION (dt='2020-06-14')(id, login_name, nick_name, name, phone_num, email, user_level, birthday, gender, create_time, operate_time)
VALUES (3, 'user3', 'nick3', '王五', '13700137000', 'wangwu@example.com', 3, '2002-01-01', '男', '2020-06-14', '2020-06-14');

INSERT INTO ods_user_info PARTITION (dt='2020-06-14')(id, login_name, nick_name, name, phone_num, email, user_level, birthday, gender, create_time, operate_time)
VALUES (4, 'user4', 'nick4', '赵六', '13600136000', 'zhaoliu@example.com', 4, '2003-01-01', '女', '2020-06-14', '2020-06-14');

INSERT INTO ods_user_info PARTITION (dt='2020-06-14')(id, login_name, nick_name, name, phone_num, email, user_level, birthday, gender, create_time, operate_time)
VALUES (5, 'user5', 'nick5', '孙七', '13500135000', 'sunqi@example.com', 5, '2004-01-01', '男', '2020-06-14', '2020-06-14');

INSERT INTO ods_user_info PARTITION (dt='2020-06-14')(id, login_name, nick_name, name, phone_num, email, user_level, birthday, gender, create_time, operate_time)
VALUES (6, 'user6', 'nick6', '周八', '13400134000', 'zhouba@example.com', 6, '2005-01-01', '女', '2020-06-14', '2020-06-14');

INSERT INTO ods_user_info PARTITION (dt='2020-06-14')(id, login_name, nick_name, name, phone_num, email, user_level, birthday, gender, create_time, operate_time)
VALUES (7, 'user7', 'nick7', '吴九', '13300133000', 'wujiu@example.com', 7, '2006-01-01', '男', '2020-06-14', '2020-06-14');

INSERT INTO ods_user_info PARTITION (dt='2020-06-14')(id, login_name, nick_name, name, phone_num, email, user_level, birthday, gender, create_time, operate_time)
VALUES (8, 'user8', 'nick8', '郑十', '13200132000', 'zhengshi@example.com', 8, '2007-01-01', '女', '2020-06-14', '2020-06-14');

INSERT INTO ods_user_info PARTITION (dt='2020-06-14')(id, login_name, nick_name, name, phone_num, email, user_level, birthday, gender, create_time, operate_time)
VALUES (9, 'user9', 'nick9', '冯十一', '13100131000', 'fengshiyi@example.com', 9, '2008-01-01', '男', '2020-06-14', '2020-06-14');

INSERT INTO ods_user_info PARTITION (dt='2020-06-14')(id, login_name, nick_name, name, phone_num, email, user_level, birthday, gender, create_time, operate_time)
VALUES (10, 'user10', 'nick10', '陈十二', '13000130000', 'chenshier@example.com', 10, '2009-01-01', '女', '2020-06-14', '2020-06-14');

select *from ods_user_info;

ALTER TABLE ods_user_info DROP  PARTITION (dt='2020-06-15');
INSERT INTO ods_user_info PARTITION (dt='2020-06-15')(id, login_name, nick_name, name, phone_num, email, user_level, birthday, gender, create_time, operate_time)
VALUES (8, 'user8', 'nick8', '郑十san', '13200132000', 'zhengshi@example.com', 8, '2007-01-01', '女', '2020-06-15', '2020-06-15');

INSERT INTO ods_user_info PARTITION (dt='2020-06-15')(id, login_name, nick_name, name, phone_num, email, user_level, birthday, gender, create_time, operate_time)
VALUES (9, 'user9', 'nick9', '冯十wu', '13100131000', 'fengshiyi@example.com', 9, '2008-01-01', '男', '2020-06-15', '2020-06-15');

INSERT INTO ods_user_info PARTITION (dt='2020-06-15')(id, login_name, nick_name, name, phone_num, email, user_level, birthday, gender, create_time, operate_time)
VALUES (10, 'user10', 'nick10', '陈yi二', '13000130000', 'chenshier@example.com', 10, '2009-01-01', '女', '2020-06-15', '2020-06-15');

创建拉链表

DROP TABLE IF EXISTS dim_user_info;
CREATE EXTERNAL TABLE dim_user_info(
    `id` STRING COMMENT '用户id',
    `login_name` STRING COMMENT '用户名称',
    `nick_name` STRING COMMENT '用户昵称',
    `name` STRING COMMENT '用户姓名',
    `phone_num` STRING COMMENT '手机号码',
    `email` STRING COMMENT '邮箱',
    `user_level` STRING COMMENT '用户等级',
    `birthday` STRING COMMENT '生日',
    `gender` STRING COMMENT '性别',
    `create_time` STRING COMMENT '创建时间',
    `operate_time` STRING COMMENT '操作时间',
    `start_date` STRING COMMENT '开始日期',
    `end_date` STRING COMMENT '结束日期'
) COMMENT '用户表'
PARTITIONED BY (`dt` STRING)
ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t';

初始化拉链表

insert overwrite table dim_user_info partition(dt='9999-99-99')
select
    id,
    login_name,
    nick_name,
    md5(name),
    md5(phone_num),
    md5(email),
    user_level,
    birthday,
    gender,
    create_time,
    operate_time,
    '2020-06-14',
    '9999-99-99'
from ods_user_info
where dt='2020-06-14';

拉链表具体sql实现

with
tmp as
(
    select
        old.id old_id,
        old.login_name old_login_name,
        old.nick_name old_nick_name,
        old.name old_name,
        old.phone_num old_phone_num,
        old.email old_email,
        old.user_level old_user_level,
        old.birthday old_birthday,
        old.gender old_gender,
        old.create_time old_create_time,
        old.operate_time old_operate_time,
        old.start_date old_start_date,
        old.end_date old_end_date,
        new.id new_id,
        new.login_name new_login_name,
        new.nick_name new_nick_name,
        new.name new_name,
        new.phone_num new_phone_num,
        new.email new_email,
        new.user_level new_user_level,
        new.birthday new_birthday,
        new.gender new_gender,
        new.create_time new_create_time,
        new.operate_time new_operate_time,
        new.start_date new_start_date,
        new.end_date new_end_date
    from
    (
        select
            id,
            login_name,
            nick_name,
            name,
            phone_num,
            email,
            user_level,
            birthday,
            gender,
            create_time,
            operate_time,
            start_date,
            end_date
        from dim_user_info
        where dt='9999-99-99'
    )old
    full outer join
    (
        select
            id,
            login_name,
            nick_name,
            md5(name) name,
            md5(phone_num) phone_num,
            md5(email) email,
            user_level,
            birthday,
            gender,
            create_time,
            operate_time,
            '2020-06-15' start_date,
            '9999-99-99' end_date
        from ods_user_info
        where dt='2020-06-15'
    )new
    on old.id=new.id
)
insert overwrite table dim_user_info partition(dt)
select
    nvl(new_id,old_id),
    nvl(new_login_name,old_login_name),
    nvl(new_nick_name,old_nick_name),
    nvl(new_name,old_name),
    nvl(new_phone_num,old_phone_num),
    nvl(new_email,old_email),
    nvl(new_user_level,old_user_level),
    nvl(new_birthday,old_birthday),
    nvl(new_gender,old_gender),
    nvl(new_create_time,old_create_time),
    nvl(new_operate_time,old_operate_time),
    nvl(new_start_date,old_start_date),
    nvl(new_end_date,old_end_date),
    nvl(new_end_date,old_end_date) dt
from tmp
union all
select
    old_id,
    old_login_name,
    old_nick_name,
    old_name,
    old_phone_num,
    old_email,
    old_user_level,
    old_birthday,
    old_gender,
    old_create_time,
    old_operate_time,
    old_start_date,
    cast(date_add('2020-06-15',-1) as string),
    cast(date_add('2020-06-15',-1) as string) dt
from tmp
where new_id is not null and old_id is not null;

查询最终拉链表数据

select * from dim_user_info where dt = '9999-99-99';

Hive中stage与job的关联

1）通过explain可以清晰的看到stage划分。

2）经过自动优化之后，有些stage并不会执行，这些stage就是空的stage。

3）基于stage划分，如何确定job数量，主要是看哪些stage会执行。只有需要执行的stage才会提交到yarn，然后生成具体的job application。

Explain
STAGE DEPENDENCIES:
  Stage-1 is a root stage
  Stage-13 depends on stages: Stage-1
  Stage-2 depends on stages: Stage-13
  Stage-8 depends on stages: Stage-2 , consists of Stage-5, Stage-4, Stage-6
  Stage-5
  Stage-0 depends on stages: Stage-5, Stage-4, Stage-7
  Stage-3 depends on stages: Stage-0
  Stage-4
  Stage-6
  Stage-7 depends on stages: Stage-6

STAGE PLANS:
  Stage: Stage-1
    Map Reduce
      Map Operator Tree:
          TableScan
            alias: dim_user_info
            Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
            Select Operator
              expressions: id (type: string), login_name (type: string), nick_name (type: string), name (type: string), phone_num (type: string), email (type: string), user_level (type: string), birthday (type: string), gender (type: string), create_time (type: string), operate_time (type: string), start_date (type: string), end_date (type: string)
              outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11, _col12
              Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
              Reduce Output Operator
                key expressions: _col0 (type: string)
                sort order: +
                Map-reduce partition columns: _col0 (type: string)
                Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                value expressions: _col1 (type: string), _col2 (type: string), _col3 (type: string), _col4 (type: string), _col5 (type: string), _col6 (type: string), _col7 (type: string), _col8 (type: string), _col9 (type: string), _col10 (type: string), _col11 (type: string), _col12 (type: string)
          TableScan
            alias: ods_user_info
            Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
            Filter Operator
              predicate: (dt = '2020-06-15') (type: boolean)
              Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
              Select Operator
                expressions: id (type: string), login_name (type: string), nick_name (type: string), md5(name) (type: string), md5(phone_num) (type: string), md5(email) (type: string), user_level (type: string), birthday (type: string), gender (type: string), create_time (type: string), operate_time (type: string), '2020-06-15' (type: string), '9999-99-99' (type: string)
                outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11, _col12
                Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                Reduce Output Operator
                  key expressions: _col0 (type: string)
                  sort order: +
                  Map-reduce partition columns: _col0 (type: string)
                  Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                  value expressions: _col1 (type: string), _col2 (type: string), _col3 (type: string), _col4 (type: string), _col5 (type: string), _col6 (type: string), _col7 (type: string), _col8 (type: string), _col9 (type: string), _col10 (type: string), _col11 (type: string), _col12 (type: string)
      Reduce Operator Tree:
        Join Operator
          condition map:
               Outer Join 0 to 1
          keys:
            0 _col0 (type: string)
            1 _col0 (type: string)
          outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11, _col12, _col13, _col14, _col15, _col16, _col17, _col18, _col19, _col20, _col21, _col22, _col23, _col24, _col25
          Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
          Select Operator
            expressions: NVL(_col13,_col0) (type: string), NVL(_col14,_col1) (type: string), NVL(_col15,_col2) (type: string), NVL(_col16,_col3) (type: string), NVL(_col17,_col4) (type: string), NVL(_col18,_col5) (type: string), NVL(_col19,_col6) (type: string), NVL(_col20,_col7) (type: string), NVL(_col21,_col8) (type: string), NVL(_col22,_col9) (type: string), NVL(_col23,_col10) (type: string), NVL(_col24,_col11) (type: string), NVL(_col25,_col12) (type: string), NVL(_col25,_col12) (type: string)
            outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11, _col12, _col13
            Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
            File Output Operator
              compressed: false
              table:
                  input format: org.apache.hadoop.mapred.SequenceFileInputFormat
                  output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
                  serde: org.apache.hadoop.hive.serde2.lazybinary.LazyBinarySerDe

  Stage: Stage-13
    Map Reduce Local Work
      Alias -> Map Local Tables:
        null-subquery2:$hdt$_0-subquery2:$hdt$_0:dim_user_info 
          Fetch Operator
            limit: -1
      Alias -> Map Local Operator Tree:
        null-subquery2:$hdt$_0-subquery2:$hdt$_0:dim_user_info 
          TableScan
            alias: dim_user_info
            Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
            Filter Operator
              predicate: id is not null (type: boolean)
              Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
              Select Operator
                expressions: id (type: string), login_name (type: string), nick_name (type: string), name (type: string), phone_num (type: string), email (type: string), user_level (type: string), birthday (type: string), gender (type: string), create_time (type: string), operate_time (type: string), start_date (type: string)
                outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11
                Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                HashTable Sink Operator
                  keys:
                    0 _col0 (type: string)
                    1 _col0 (type: string)

  Stage: Stage-2
    Map Reduce
      Map Operator Tree:
          TableScan
            Union
              Statistics: Num rows: 2 Data size: 0 Basic stats: PARTIAL Column stats: NONE
              File Output Operator
                compressed: false
                Statistics: Num rows: 2 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                table:
                    input format: org.apache.hadoop.mapred.TextInputFormat
                    output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
                    serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
                    name: zmm.dim_user_info
          TableScan
            alias: ods_user_info
            Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
            Filter Operator
              predicate: ((dt = '2020-06-15') and id is not null) (type: boolean)
              Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
              Select Operator
                expressions: id (type: string)
                outputColumnNames: _col0
                Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                Map Join Operator
                  condition map:
                       Inner Join 0 to 1
                  keys:
                    0 _col0 (type: string)
                    1 _col0 (type: string)
                  outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11
                  Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                  Select Operator
                    expressions: _col0 (type: string), _col1 (type: string), _col2 (type: string), _col3 (type: string), _col4 (type: string), _col5 (type: string), _col6 (type: string), _col7 (type: string), _col8 (type: string), _col9 (type: string), _col10 (type: string), _col11 (type: string), '2020-06-14' (type: string), '2020-06-14' (type: string)
                    outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11, _col12, _col13
                    Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                    Union
                      Statistics: Num rows: 2 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                      File Output Operator
                        compressed: false
                        Statistics: Num rows: 2 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                        table:
                            input format: org.apache.hadoop.mapred.TextInputFormat
                            output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
                            serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
                            name: zmm.dim_user_info
      Local Work:
        Map Reduce Local Work

  Stage: Stage-8
    Conditional Operator

  Stage: Stage-5
    Move Operator
      files:
          hdfs directory: true
          destination: hdfs://192.168.0.122:9000/user/hive/warehouse/zmm.db/dim_user_info/.hive-staging_hive_2023-09-28_16-48-39_357_1852508236922488629-1/-ext-10000

  Stage: Stage-0
    Move Operator
      tables:
          partition:
            dt 
          replace: true
          table:
              input format: org.apache.hadoop.mapred.TextInputFormat
              output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
              serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
              name: zmm.dim_user_info

  Stage: Stage-3
    Stats-Aggr Operator

  Stage: Stage-4
    Map Reduce
      Map Operator Tree:
          TableScan
            File Output Operator
              compressed: false
              table:
                  input format: org.apache.hadoop.mapred.TextInputFormat
                  output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
                  serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
                  name: zmm.dim_user_info

  Stage: Stage-6
    Map Reduce
      Map Operator Tree:
          TableScan
            File Output Operator
              compressed: false
              table:
                  input format: org.apache.hadoop.mapred.TextInputFormat
                  output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
                  serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
                  name: zmm.dim_user_info

  Stage: Stage-7
    Move Operator
      files:
          hdfs directory: true
          destination: hdfs://192.168.0.122:9000/user/hive/warehouse/zmm.db/dim_user_info/.hive-staging_hive_2023-09-28_16-48-39_357_1852508236922488629-1/-ext-10000

Explain
STAGE DEPENDENCIES:
  Stage-1 is a root stage
  Stage-2 depends on stages: Stage-1, Stage-10, Stage-12, Stage-13
  Stage-8 depends on stages: Stage-2 , consists of Stage-5, Stage-4, Stage-6
  Stage-5
  Stage-0 depends on stages: Stage-5, Stage-4, Stage-7
  Stage-3 depends on stages: Stage-0
  Stage-4
  Stage-6
  Stage-7 depends on stages: Stage-6
  Stage-14 is a root stage , consists of Stage-15, Stage-16, Stage-10
  Stage-15 has a backup stage: Stage-10
  Stage-12 depends on stages: Stage-15
  Stage-16 has a backup stage: Stage-10
  Stage-13 depends on stages: Stage-16
  Stage-10

STAGE PLANS:
  Stage: Stage-1
    Map Reduce
      Map Operator Tree:
          TableScan
            alias: dim_user_info
            Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
            Filter Operator
              predicate: (dt = '9999-99-99') (type: boolean)
              Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
              Select Operator
                expressions: id (type: string), login_name (type: string), nick_name (type: string), name (type: string), phone_num (type: string), email (type: string), user_level (type: string), birthday (type: string), gender (type: string), create_time (type: string), operate_time (type: string), start_date (type: string), end_date (type: string)
                outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11, _col12
                Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                Reduce Output Operator
                  key expressions: _col0 (type: string)
                  sort order: +
                  Map-reduce partition columns: _col0 (type: string)
                  Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                  value expressions: _col1 (type: string), _col2 (type: string), _col3 (type: string), _col4 (type: string), _col5 (type: string), _col6 (type: string), _col7 (type: string), _col8 (type: string), _col9 (type: string), _col10 (type: string), _col11 (type: string), _col12 (type: string)
          TableScan
            alias: ods_user_info
            Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
            Filter Operator
              predicate: (dt = '2020-06-15') (type: boolean)
              Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
              Select Operator
                expressions: id (type: string), login_name (type: string), nick_name (type: string), md5(name) (type: string), md5(phone_num) (type: string), md5(email) (type: string), user_level (type: string), birthday (type: string), gender (type: string), create_time (type: string), operate_time (type: string), '2020-06-15' (type: string), '9999-99-99' (type: string)
                outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11, _col12
                Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                Reduce Output Operator
                  key expressions: _col0 (type: string)
                  sort order: +
                  Map-reduce partition columns: _col0 (type: string)
                  Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                  value expressions: _col1 (type: string), _col2 (type: string), _col3 (type: string), _col4 (type: string), _col5 (type: string), _col6 (type: string), _col7 (type: string), _col8 (type: string), _col9 (type: string), _col10 (type: string), _col11 (type: string), _col12 (type: string)
      Reduce Operator Tree:
        Join Operator
          condition map:
               Outer Join 0 to 1
          keys:
            0 _col0 (type: string)
            1 _col0 (type: string)
          outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11, _col12, _col13, _col14, _col15, _col16, _col17, _col18, _col19, _col20, _col21, _col22, _col23, _col24, _col25
          Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
          Select Operator
            expressions: NVL(_col13,_col0) (type: string), NVL(_col14,_col1) (type: string), NVL(_col15,_col2) (type: string), NVL(_col16,_col3) (type: string), NVL(_col17,_col4) (type: string), NVL(_col18,_col5) (type: string), NVL(_col19,_col6) (type: string), NVL(_col20,_col7) (type: string), NVL(_col21,_col8) (type: string), NVL(_col22,_col9) (type: string), NVL(_col23,_col10) (type: string), NVL(_col24,_col11) (type: string), NVL(_col25,_col12) (type: string), NVL(_col25,_col12) (type: string)
            outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11, _col12, _col13
            Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
            File Output Operator
              compressed: false
              table:
                  input format: org.apache.hadoop.mapred.SequenceFileInputFormat
                  output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
                  serde: org.apache.hadoop.hive.serde2.lazybinary.LazyBinarySerDe

  Stage: Stage-2
    Map Reduce
      Map Operator Tree:
          TableScan
            Union
              Statistics: Num rows: 2 Data size: 0 Basic stats: PARTIAL Column stats: NONE
              File Output Operator
                compressed: false
                Statistics: Num rows: 2 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                table:
                    input format: org.apache.hadoop.hive.ql.io.parquet.MapredParquetInputFormat
                    output format: org.apache.hadoop.hive.ql.io.parquet.MapredParquetOutputFormat
                    serde: org.apache.hadoop.hive.ql.io.parquet.serde.ParquetHiveSerDe
                    name: zmm.dim_user_info
          TableScan
            Union
              Statistics: Num rows: 2 Data size: 0 Basic stats: PARTIAL Column stats: NONE
              File Output Operator
                compressed: false
                Statistics: Num rows: 2 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                table:
                    input format: org.apache.hadoop.hive.ql.io.parquet.MapredParquetInputFormat
                    output format: org.apache.hadoop.hive.ql.io.parquet.MapredParquetOutputFormat
                    serde: org.apache.hadoop.hive.ql.io.parquet.serde.ParquetHiveSerDe
                    name: zmm.dim_user_info

  Stage: Stage-8
    Conditional Operator

  Stage: Stage-5
    Move Operator
      files:
          hdfs directory: true
          destination: hdfs://192.168.0.122:9000/warehouse/gmall/dim/dim_user_info/.hive-staging_hive_2023-09-28_16-23-09_282_7816820202500856515-1/-ext-10000

  Stage: Stage-0
    Move Operator
      tables:
          partition:
            dt 
          replace: true
          table:
              input format: org.apache.hadoop.hive.ql.io.parquet.MapredParquetInputFormat
              output format: org.apache.hadoop.hive.ql.io.parquet.MapredParquetOutputFormat
              serde: org.apache.hadoop.hive.ql.io.parquet.serde.ParquetHiveSerDe
              name: zmm.dim_user_info

  Stage: Stage-3
    Stats-Aggr Operator

  Stage: Stage-4
    Map Reduce
      Map Operator Tree:
          TableScan
            File Output Operator
              compressed: false
              table:
                  input format: org.apache.hadoop.hive.ql.io.parquet.MapredParquetInputFormat
                  output format: org.apache.hadoop.hive.ql.io.parquet.MapredParquetOutputFormat
                  serde: org.apache.hadoop.hive.ql.io.parquet.serde.ParquetHiveSerDe
                  name: zmm.dim_user_info

  Stage: Stage-6
    Map Reduce
      Map Operator Tree:
          TableScan
            File Output Operator
              compressed: false
              table:
                  input format: org.apache.hadoop.hive.ql.io.parquet.MapredParquetInputFormat
                  output format: org.apache.hadoop.hive.ql.io.parquet.MapredParquetOutputFormat
                  serde: org.apache.hadoop.hive.ql.io.parquet.serde.ParquetHiveSerDe
                  name: zmm.dim_user_info

  Stage: Stage-7
    Move Operator
      files:
          hdfs directory: true
          destination: hdfs://192.168.0.122:9000/warehouse/gmall/dim/dim_user_info/.hive-staging_hive_2023-09-28_16-23-09_282_7816820202500856515-1/-ext-10000

  Stage: Stage-14
    Conditional Operator

  Stage: Stage-15
    Map Reduce Local Work
      Alias -> Map Local Tables:
        null-subquery2:$hdt$_0-subquery2:$hdt$_1:ods_user_info 
          Fetch Operator
            limit: -1
      Alias -> Map Local Operator Tree:
        null-subquery2:$hdt$_0-subquery2:$hdt$_1:ods_user_info 
          TableScan
            alias: ods_user_info
            Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
            Filter Operator
              predicate: ((dt = '2020-06-15') and id is not null) (type: boolean)
              Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
              Select Operator
                expressions: id (type: string)
                outputColumnNames: _col0
                Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                HashTable Sink Operator
                  keys:
                    0 _col0 (type: string)
                    1 _col0 (type: string)

  Stage: Stage-12
    Map Reduce
      Map Operator Tree:
          TableScan
            alias: dim_user_info
            Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
            Filter Operator
              predicate: ((dt = '9999-99-99') and id is not null) (type: boolean)
              Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
              Select Operator
                expressions: id (type: string), login_name (type: string), nick_name (type: string), name (type: string), phone_num (type: string), email (type: string), user_level (type: string), birthday (type: string), gender (type: string), create_time (type: string), operate_time (type: string), start_date (type: string)
                outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11
                Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                Map Join Operator
                  condition map:
                       Inner Join 0 to 1
                  keys:
                    0 _col0 (type: string)
                    1 _col0 (type: string)
                  outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11
                  Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                  Select Operator
                    expressions: _col0 (type: string), _col1 (type: string), _col2 (type: string), _col3 (type: string), _col4 (type: string), _col5 (type: string), _col6 (type: string), _col7 (type: string), _col8 (type: string), _col9 (type: string), _col10 (type: string), _col11 (type: string), '2020-06-14' (type: string), '2020-06-14' (type: string)
                    outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11, _col12, _col13
                    Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                    File Output Operator
                      compressed: false
                      table:
                          input format: org.apache.hadoop.mapred.SequenceFileInputFormat
                          output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
                          serde: org.apache.hadoop.hive.serde2.lazybinary.LazyBinarySerDe
      Local Work:
        Map Reduce Local Work

  Stage: Stage-16
    Map Reduce Local Work
      Alias -> Map Local Tables:
        null-subquery2:$hdt$_0-subquery2:$hdt$_0:dim_user_info 
          Fetch Operator
            limit: -1
      Alias -> Map Local Operator Tree:
        null-subquery2:$hdt$_0-subquery2:$hdt$_0:dim_user_info 
          TableScan
            alias: dim_user_info
            Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
            Filter Operator
              predicate: ((dt = '9999-99-99') and id is not null) (type: boolean)
              Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
              Select Operator
                expressions: id (type: string), login_name (type: string), nick_name (type: string), name (type: string), phone_num (type: string), email (type: string), user_level (type: string), birthday (type: string), gender (type: string), create_time (type: string), operate_time (type: string), start_date (type: string)
                outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11
                Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                HashTable Sink Operator
                  keys:
                    0 _col0 (type: string)
                    1 _col0 (type: string)

  Stage: Stage-13
    Map Reduce
      Map Operator Tree:
          TableScan
            alias: ods_user_info
            Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
            Filter Operator
              predicate: ((dt = '2020-06-15') and id is not null) (type: boolean)
              Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
              Select Operator
                expressions: id (type: string)
                outputColumnNames: _col0
                Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                Map Join Operator
                  condition map:
                       Inner Join 0 to 1
                  keys:
                    0 _col0 (type: string)
                    1 _col0 (type: string)
                  outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11
                  Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                  Select Operator
                    expressions: _col0 (type: string), _col1 (type: string), _col2 (type: string), _col3 (type: string), _col4 (type: string), _col5 (type: string), _col6 (type: string), _col7 (type: string), _col8 (type: string), _col9 (type: string), _col10 (type: string), _col11 (type: string), '2020-06-14' (type: string), '2020-06-14' (type: string)
                    outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11, _col12, _col13
                    Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                    File Output Operator
                      compressed: false
                      table:
                          input format: org.apache.hadoop.mapred.SequenceFileInputFormat
                          output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
                          serde: org.apache.hadoop.hive.serde2.lazybinary.LazyBinarySerDe
      Local Work:
        Map Reduce Local Work

  Stage: Stage-10
    Map Reduce
      Map Operator Tree:
          TableScan
            alias: dim_user_info
            Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
            Filter Operator
              predicate: ((dt = '9999-99-99') and id is not null) (type: boolean)
              Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
              Select Operator
                expressions: id (type: string), login_name (type: string), nick_name (type: string), name (type: string), phone_num (type: string), email (type: string), user_level (type: string), birthday (type: string), gender (type: string), create_time (type: string), operate_time (type: string), start_date (type: string)
                outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11
                Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                Reduce Output Operator
                  key expressions: _col0 (type: string)
                  sort order: +
                  Map-reduce partition columns: _col0 (type: string)
                  Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                  value expressions: _col1 (type: string), _col2 (type: string), _col3 (type: string), _col4 (type: string), _col5 (type: string), _col6 (type: string), _col7 (type: string), _col8 (type: string), _col9 (type: string), _col10 (type: string), _col11 (type: string)
          TableScan
            alias: ods_user_info
            Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
            Filter Operator
              predicate: ((dt = '2020-06-15') and id is not null) (type: boolean)
              Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
              Select Operator
                expressions: id (type: string)
                outputColumnNames: _col0
                Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
                Reduce Output Operator
                  key expressions: _col0 (type: string)
                  sort order: +
                  Map-reduce partition columns: _col0 (type: string)
                  Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
      Reduce Operator Tree:
        Join Operator
          condition map:
               Inner Join 0 to 1
          keys:
            0 _col0 (type: string)
            1 _col0 (type: string)
          outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11
          Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
          Select Operator
            expressions: _col0 (type: string), _col1 (type: string), _col2 (type: string), _col3 (type: string), _col4 (type: string), _col5 (type: string), _col6 (type: string), _col7 (type: string), _col8 (type: string), _col9 (type: string), _col10 (type: string), _col11 (type: string), '2020-06-14' (type: string), '2020-06-14' (type: string)
            outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5, _col6, _col7, _col8, _col9, _col10, _col11, _col12, _col13
            Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE
            File Output Operator
              compressed: false
              table:
                  input format: org.apache.hadoop.mapred.SequenceFileInputFormat
                  output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
                  serde: org.apache.hadoop.hive.serde2.lazybinary.LazyBinarySerDe