Apache Pig - CEIL()

The CEIL() function is used to calculate value of a given expression rounded up to the nearest integer.

Syntax

Here is the syntax of the CEIL() function.

grunt> CEIL(expression)

Example

Assume that there is a file named math.txt in the HDFS directory /pig_data/. This file contains integer and floating point values as shown below.

math.txt

5 
16 
9 
2.5 
5.9 
3.1 

And, we have loaded this file into Pig with a relation named math_data as shown below.

grunt> math_data = LOAD 'hdfs://localhost:9000/pig_data/math.txt' USING PigStorage(',')
   as (data:float);

Let us now calculate the ceil values of the contents of the math.txt file using CEIL() function as shown below.

grunt> ceil_data = foreach math_data generate (data), CEIL(data);

The above statement stores the result in the relation named ceil_data. Verify the contents of the relation using the Dump operator as shown below.

grunt> Dump ceil_data;
  
(5.0,5.0) 
(16.0,16.0) 
(9.0,9.0) 
(2.5,3.0) 
(5.9,6.0) 
(3.1,4.0)