hive 实战笔记case1_hive case 0 1-CSDN博客

本文链接：https://blog.csdn.net/mlljava1111/article/details/47345653

本文通过创建多个外部表来记录订单从创建到完成或取消的各个阶段的时间戳，并使用两种不同的方法来整合这些时间戳，形成订单跟踪表。进一步筛选出创建后超过2小时才被拣选或超过4小时才发货的订单。

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– case1 –

–========== order_created ==========–

/*
10703007267488  2014-05-01 06:01:12.334+01
10101043505096  2014-05-01 07:28:12.342+01
10103043509747  2014-05-01 07:50:12.33+01
10103043501575  2014-05-01 09:27:12.33+01
10104043514061  2014-05-01 09:03:12.324+01
*/

CREATE EXTERNAL TABLE order_created (
    orderNumber STRING
  , event_time  STRING
)
ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t'
LOCATION '/tmp/db_case1/order_created';

CREATE EXTERNAL TABLE order_created_partition (
    orderNumber STRING
  , event_time  STRING
)
PARTITIONED BY (event_month string)
ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t'
LOCATION '/tmp/db_case1/order_created_partition';

CREATE TABLE order_created_dynamic_partition (
    orderNumber STRING
  , event_time  STRING
)
PARTITIONED BY (event_month string)
;
insert into table order_created_dynamic_partition PARTITION (event_month)
select orderNumber, event_time, substr(event_time, 1, 7) as event_month from order_created;
set hive.exec.dynamic.partition.mode=nonstrict;

/*
    hive.exec.dynamic.partition=false
    hive.exec.dynamic.partition.mode=strict
    hive.exec.max.dynamic.partitions.pernode=100    Maximum number of dynamic partitions allowed to be created in each mapper/reducer node
    hive.exec.max.dynamic.partitions=1000           Maximum number of dynamic partitions allowed to be created in total
    hive.exec.max.created.files=100000              Maximum number of HDFS files created by all mappers/reducers in a MapReduce job
    hive.error.on.empty.partition=false
*/

select INPUT__FILE__NAME, ordernumber, event_time, BLOCK__OFFSET__INSIDE__FILE / (length(ordernumber) + length(event_time) + 2) + 1 from order_created_dynamic_partition;
select INPUT__FILE__NAME, ordernumber, event_time, round(BLOCK__OFFSET__INSIDE__FILE / (length(ordernumber) + length(event_time) + 2) + 1) from order_created_dynamic_partition;

desc formatted order_created_dynamic_partition;
desc formatted order_created_dynamic_partition partition (event_month='2014-05');

CREATE TABLE order_created_dynamic_partition_parquet (
    orderNumber STRING
  , event_time  STRING
)
PARTITIONED BY (event_month string)
ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t'
STORED AS parquet;

MSCK REPAIR TABLE order_created_dynamic_partition_parquet;

-- set to text file format, bug in hive
ALTER TABLE order_created_dynamic_partition_parquet PARTITION (event_month='2014-06') SET SERDE 'org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe';
ALTER TABLE order_created_dynamic_partition_parquet PARTITION (event_month='2014-06') SET FILEFORMAT textfile;
-- impala
ALTER TABLE order_created_dynamic_partition_parquet PARTITION (event_month='2014-06') SET FILEFORMAT textfile;

-- set to parquet file format, hive <= 0.12
ALTER TABLE order_created_dynamic_partition_parquet PARTITION (event_month='2014-07') SET SERDE 'parquet.hive.serde.ParquetHiveSerDe';
ALTER TABLE order_created_dynamic_partition_parquet PARTITION (event_month='2014-07') SET FILEFORMAT INPUTFORMAT 'parquet.hive.DeprecatedParquetInputFormat' OUTPUTFORMAT 'parquet.hive.DeprecatedParquetOutputFormat';
-- impala or hive 0.13
ALTER TABLE order_created_dynamic_partition_parquet PARTITION (event_month='2014-07') SET FILEFORMAT parquet;

insert into table order_created_dynamic_partition_parquet PARTITION (event_month='2014-07') select orderNumber, event_time from order_created;

–========== order_picked ==========–

/*
10703007267488  2014-05-01 07:02:12.334+01
10101043505096  2014-05-01 08:29:12.342+01
10103043509747  2014-05-01 10:55:12.33+01
*/

CREATE EXTERNAL TABLE order_picked (
    orderNumber STRING
  , event_time  STRING
)
ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t'
LOCATION '/tmp/db_case1/order_picked';

–========== order_shipped ==========–

/*
10703007267488  2014-05-01 10:00:12.334+01
10101043505096  2014-05-01 18:39:12.342+01
*/

CREATE EXTERNAL TABLE order_shipped (
    orderNumber STRING
  , event_time  STRING
)
ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t'
LOCATION '/tmp/db_case1/order_shipped';

–========== order_received ==========–

/*
10703007267488  2014-05-02 12:12:12.334+01
*/

CREATE EXTERNAL TABLE order_received (
    orderNumber STRING
  , event_time  STRING
)
ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t'
LOCATION '/tmp/db_case1/order_received';

–========== order_cancelled ==========–

/*
10103043501575  2014-05-01 12:12:12.334+01
*/
CREATE EXTERNAL TABLE order_cancelled (
    orderNumber STRING
  , event_time  STRING
)
ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t'
LOCATION '/tmp/db_case1/order_cancelled';

–=====================================–

CREATE TABLE order_tracking AS
SELECT orderNumber
     , max(CASE WHEN type_id="order_created"   THEN event_time ELSE '0' END) AS order_created_ts
     , max(CASE WHEN type_id="order_picked"    THEN event_time ELSE '0' END) AS order_picked_ts
     , max(CASE WHEN type_id="order_shipped"   THEN event_time ELSE '0' END) AS order_shipped_ts
     , max(CASE WHEN type_id="order_received"  THEN event_time ELSE '0' END) AS order_received_ts
     , max(CASE WHEN type_id="order_cancelled" THEN event_time ELSE '0' END) AS order_cancelled_ts
FROM (
    select orderNumber, "order_created"   as type_id, event_time FROM order_created
  UNION ALL
    select orderNumber, "order_picked"    as type_id, event_time FROM order_picked
  UNION ALL
    select orderNumber, "order_shipped"   as type_id, event_time FROM order_shipped
  UNION ALL
    select orderNumber, "order_received"  as type_id, event_time FROM order_received
  UNION ALL
    select orderNumber, "order_cancelled" as type_id, event_time FROM order_cancelled
) u
group by orderNumber;

select * from order_tracking order by order_created_ts limit 5;

–=====================================–

CREATE TABLE order_tracking_join AS
select t1.orderNumber
     , t1.event_time as order_created_ts
     , t2.event_time as order_picked_ts
     , t3.event_time as order_shipped_ts
     , t4.event_time as order_received_ts
     , t5.event_time as order_cancelled_ts
from (
  select ordernumber, max(event_time) as event_time from order_created group by ordernumber
) t1
left outer join (
  select ordernumber, max(event_time) as event_time from order_picked group by ordernumber
) t2
on t1.ordernumber = t2.ordernumber
left outer join (
  select ordernumber, max(event_time) as event_time from order_shipped group by ordernumber
) t3
on t1.ordernumber = t3.ordernumber
left outer join (
  select ordernumber, max(event_time) as event_time from order_received group by ordernumber
) t4
on t1.ordernumber = t4.ordernumber
left outer join (
  select ordernumber, max(event_time) as event_time from order_cancelled group by ordernumber
) t5
on t1.ordernumber = t5.ordernumber;

select * from order_tracking_join order by order_created_ts limit 5;

–=====================================–

select orderNumber
     , order_created_ts
     , order_picked_ts
     , order_shipped_ts
     , order_received_ts
     , order_cancelled_ts
  from order_tracking
 WHERE order_created_ts != '0' AND order_cancelled_ts = '0'
   AND (
    COALESCE(unix_timestamp(order_picked_ts, 'yyyy-MM-dd HH:mm:ss.S'), 0) - unix_timestamp(order_created_ts, 'yyyy-MM-dd HH:mm:ss.S') > 2 * 60 * 60
    OR
    COALESCE(unix_timestamp(order_shipped_ts, 'yyyy-MM-dd HH:mm:ss.S'), 0) - unix_timestamp(order_created_ts, 'yyyy-MM-dd HH:mm:ss.S') > 4 * 60 * 60
    OR
    COALESCE(unix_timestamp(order_shipped_ts, 'yyyy-MM-dd HH:mm:ss.S'), 0) - unix_timestamp(order_created_ts, 'yyyy-MM-dd HH:mm:ss.S') > 48 * 60 * 60
   )
;

select orderNumber
     , order_created_ts
     , order_picked_ts
     , order_shipped_ts
     , order_received_ts
     , order_cancelled_ts
  from order_tracking_join
 WHERE order_created_ts IS NOT NULL AND order_cancelled_ts IS NULL
   AND (
    COALESCE(unix_timestamp(order_picked_ts, 'yyyy-MM-dd HH:mm:ss.S'), 0) - unix_timestamp(order_created_ts, 'yyyy-MM-dd HH:mm:ss.S') > 2 * 60 * 60
    OR
    COALESCE(unix_timestamp(order_shipped_ts, 'yyyy-MM-dd HH:mm:ss.S'), 0) - unix_timestamp(order_created_ts, 'yyyy-MM-dd HH:mm:ss.S') > 4 * 60 * 60
    OR
    COALESCE(unix_timestamp(order_shipped_ts, 'yyyy-MM-dd HH:mm:ss.S'), 0) - unix_timestamp(order_created_ts, 'yyyy-MM-dd HH:mm:ss.S') > 48 * 60 * 60
   )
;