Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>It seems like you are looking for dynamic partitioning, and Hive supports dynamic partition inserts as detailed <a href="https://cwiki.apache.org/confluence/display/Hive/Tutorial#Tutorial-DynamicPartitionInsert">in this article</a>.</p> <p>First, you need to create a temporary table where you will put your flat data with no partition at all. In your case this would be:</p> <pre><code>CREATE TABLE flatTable (type string, id int, ts bigint, user string, key string) ROW FORMAT DELIMITED FIELDS TERMINATED BY ','; </code></pre> <p>Then, you should load your flat data file into this directory:</p> <pre><code>LOAD DATA LOCAL INPATH '/home/spaeth/tmp/hadoop-billing-data/extracted/testData.csv' INTO TABLE flatTable; </code></pre> <p>At that point you can use the dynamic partition insert. A few things to keep in mind are that you'll need the following properties:</p> <ul> <li><code>hive.exec.dynamic.partition</code> should be set to <code>true</code> because dynamic partition is disabled by default I believe.</li> <li><code>hive.exec.dynamic.partition.mode</code> should be set to <code>nonstrict</code> because you have a single partition and strict mode enforces that you need one static partition.</li> </ul> <p>So you can run the following query:</p> <pre><code>SET hive.exec.dynamic.partition=true; SET hive.exec.dynamic.partition.mode=nonstrict; FROM flatTable INSERT OVERWRITE TABLE partitionedTable PARTITION(time) SELECT user, from_unixtime(ts, 'yyyy-MM-dd') AS time </code></pre> <p>This should spawn 2 MapReduce jobs, and at the end you should see something along the lines of:</p> <pre><code>Loading data to table default.partitionedtable partition (time=null) Loading partition {time=2013-02-10} Loading partition {time=2013-02-11} Loading partition {time=2013-02-13} Loading partition {time=2013-06-09} </code></pre> <p>And to verify that your partitions are indeed here:</p> <pre><code>$ hadoop fs -ls /user/hive/warehouse/partitionedTable/ Found 4 items drwxr-xr-x - username supergroup 0 2013-11-25 18:35 /user/hive/warehouse/partitionedTable/time=2013-02-10 drwxr-xr-x - username supergroup 0 2013-11-25 18:35 /user/hive/warehouse/partitionedTable/time=2013-02-11 drwxr-xr-x - username supergroup 0 2013-11-25 18:35 /user/hive/warehouse/partitionedTable/time=2013-02-13 drwxr-xr-x - username supergroup 0 2013-11-25 18:35 /user/hive/warehouse/partitionedTable/time=2013-06-09 </code></pre> <p>Please note that dynamic partitions are only supported since Hive 0.6, so if you have an older version this is probably not going to work.</p>
    singulars
    1. This table or related slice is empty.
    1. POTable Partitioned by Timestamp Field
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USsandeepkunkunuru
    1. USCharles Menguy
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POTable Partitioned by Timestamp Field
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload