Get invited to our slack community and get access to opportunities and data science insights

first_element

first_element(x) – Returns the first element in an array

SELECT first_element(array(‘a’,’b’,’c’));
a

SELECT first_element(array());
NULL

Platforms: WhereOS, Spark, Hive

Class: hivemall.tools.array.FirstElementUDF

More functions can be added to WhereOS via Python or R bindings or as Java & Scala UDF (user-defined function), UDAF (user-defined aggregation function) and UDTF (user-defined table generating function) extensions. Custom libraries can be added on via Settings-page or installed from WhereOS Store.

View the complete guide of WhereOS functions.

share:

No Comments

TAGS : hive spark sql

first_element

Related Post

cbrt

array_append

bloom

Leave a Comment Cancel reply

Articles by Category

Recent Posts

How WhereOS and JCDecaux

Data fusion: how integra

percentile_approx

Experimentation In Produ

Open Data Utilization

WhereOS

Navigation

Contact Us