Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>You can do that use <a href="https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF#LanguageManualUDF-StringFunctions" rel="nofollow">Hive UDFs</a>. You would want to use the split UDF to split the string on commas to get an array and then use <a href="https://cwiki.apache.org/confluence/display/Hive/LanguageManual+LateralView" rel="nofollow">Lateral view along with explode UDTF</a> to "explode" the contents of the array.</p> <p>To answer your second question: This is what I can think of right now. There might be a better/easier/less hackier way to do it.</p> <p>Create a UDF say split_extended that would return as a struct with 2 elements, first one being the actual contents of the array element, second one being the index. When you explode this the type of exploded column will be a struct. One of the entries of this struct would the actual element from the array, the other would be the index corresponding to the element.</p> <p>If you think about it, we are augmenting split UDF to return 2 pieces of information - the element and the index. These are several ways of going about returning such information as a single object - structure is one of them, array being another (first element of the array being the actual element from the array, second element being the index). Another hackier way to return 2 pieces of information is to concat them with something (say a ':') that you know doesn't exist in your data so then you can have your UDF return '231:0', '234:0', '119:2', etc. and in the end instead of accessing them members of a struct, you can split the resulting string out based on ':' (using split UDF) to get the desired two pieces.</p> <p>For creating your own UDF, you will be able to leverage most, if not all of split UDF code available <a href="https://github.com/apache/hive/blob/trunk/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFSplit.java" rel="nofollow">here</a>.</p>
    singulars
    1. This table or related slice is empty.
    1. POHive: converting a comma separated string to array for table generating function
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USMark Grover
    1. USMark Grover
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POHive: converting a comma separated string to array for table generating function
      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. VTAcceptedByOriginator
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COThanks, Mark! I have a follow up question that may be difficult or impossible (see my edits to the original question). Please let me know if you have any ideas.
      singulars
      1. PO
      1. USdubois
    2. COI edited my answer to answer your second question. Good luck!
      singulars
      1. PO
      1. USMark Grover
    3. COAh, thanks, Mark--especially for the pointer to the UDF code. I ended up figuring something out that uses find_in_set() so I won't have to write my own UDF. Your help is greatly appreciated.
      singulars
      1. PO
      1. USdubois
 

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