Apache Pig - FLOOR()
The FLOOR() function is used to calculate the value of an expression rounded down to the nearest integer Here is the syntax of the FLOOR() function.
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.
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);
Now, let’s calculate the floor values of the contents of the math.txt file using FLOOR() as shown below.
grunt> floor_data = foreach math_data generate (data), FLOOR(data);
The above statement stores the result in the relation named floor_data. Verify the contents of the relation using the Dump operator as shown below.
grunt> Dump floor_data; (5.0,5.0) (16.0,16.0) (9.0,9.0) (2.5,2.0) (5.9,5.0) (3.1,3.0)