CODEWITHSUNDEEP
datehadoophivehive-partitions
Priyanka
Priyanka

Reputation: 25

Unable to create Hive unique paritions

I am unable to create unique partitions. when i am uploading data, it's creating all the dates as partition again and again, even the dates are same

create table product_order1(id int,user_id int,amount int,product string, city string, txn_date string) ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t';

OK Time taken: 0.133 seconds

    LOAD DATA LOCAL INPATH 'txn' INTO TABLE product_order1;
    Loading data to table oct19.product_order1
    Table oct19.product_order1 stats: [numFiles=1, totalSize=303]
OK

Time taken: 0.426 seconds

    hive> 
    > set hive.exec.dynamic.partition = true;
    hive> 
    > set hive.exec.dynamic.partition.mode = true;

    hive> 
    > create table dyn_part(id int,user_id int,amount int,product string,city string) PARTITIONED BY(txn_date string) ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t';
OK

Time taken: 0.14 seconds

    hive >
INSERT OVERWRITE TABLE dyn_part PARTITION(txn_date) select id,user_id,amount,product,city,txn_date from product_order1;

Result which i have received :- 

    Loading data to table oct19.dyn_part partition (txn_date=null)
     Time taken for load dynamic partitions : 944
    Loading partition {txn_date=04-02-2015}
    Loading partition {txn_date= 03-04-2015}
    Loading partition {txn_date=01-02-2015}
    Loading partition {txn_date=03-04-2015}
    Loading partition {txn_date= 01-01-2015}
    Loading partition {txn_date=01-01-2015}
    Loading partition {txn_date= 01-02-2015}
     Time taken for adding to write entity : 5
Partition oct19.dyn_part{txn_date= 01-01-2015} stats: [numFiles=1, numRows=1, totalSize=25, rawDataSize=24]
Partition oct19.dyn_part{txn_date= 01-02-2015} stats: [numFiles=1, numRows=1, totalSize=25, rawDataSize=24]
Partition oct19.dyn_part{txn_date= 03-04-2015} stats: [numFiles=1, numRows=2, totalSize=50, rawDataSize=48]
Partition oct19.dyn_part{txn_date=01-01-2015} stats: [numFiles=1, numRows=1, totalSize=26, rawDataSize=25]
Partition oct19.dyn_part{txn_date=01-02-2015} stats: [numFiles=1, numRows=1, totalSize=26, rawDataSize=25]
Partition oct19.dyn_part{txn_date=03-04-2015} stats: [numFiles=1, numRows=1, totalSize=26, rawDataSize=25]
Partition oct19.dyn_part{txn_date=04-02-2015} stats: [numFiles=1, numRows=1, totalSize=25, rawDataSize=24]
MapReduce Jobs Launched: 
Stage-Stage-1: Map: 1   Cumulative CPU: 4.03 sec   HDFS Read: 4166 HDFS Write: 614 SUCCESS
Total MapReduce CPU Time Spent: 4 seconds 30 msec

Upvotes: 1

Views: 57

Answers (1)

leftjoin
leftjoin

Reputation: 38325

I noticed that some dates contain spaces, some are without spaces:

txn_date= 03-04-2015 and txn_date=03-04-2015

Try to add trim:

INSERT OVERWRITE TABLE dyn_part PARTITION(txn_date) 
select id, user_id, amount, product, city, trim(txn_date) as txn_date 
from product_order1;

Also better use Hive compatible date format yyyy-MM-dd, it is sortable.

To format date and remove spaces at the same time you can use regexp_replace. If your current format is MM-dd-yyyy, then you can format it like this:

select regexp_replace(' 03-04-2015','.*?(\\d{2})-(\\d{2})-(\\d{4})','$3-$1-$2') --fix accordingly if it is dd-MM-yyyy. In this case it should be '$3-$2-$1' in the replacement template.

Returns:

2015-03-04

Or load like this:

INSERT OVERWRITE TABLE dyn_part PARTITION(txn_date) 
select id, user_id, amount, product, city, 
       regexp_replace(txn_date,'.*?(\\d{2})-(\\d{2})-(\\d{4})','$3-$1-$2') as txn_date 
  from product_order1;

regexp means:

'.*? - any character zero or more times

(\\d{2}) - first group of 2 digits which will be addressed in the replacement as $1

- dash literally

(\\d{2}) - second group of 2 digits which will be addressed in the replacement as $2

- dash literally

(\\d{4}) - third group of 4 digits which will be addressed in the replacement as $3

And as a replacement '$3-$1-$2' we take groups from regexp in proper order, delimited with dash. Supposed $3 is year, $1 is month, $2 is day in your dates. You place groups in proper order to get yyyy-MM-dd because it is not possible to understand which format are you using: MM-dd-yyyy or dd-MM-yyyy

Upvotes: 1

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