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What is Apache Pig - CBRT()?

  • The CBRT() function of Pig Latin is used to calculate the cube root of a given expression.


  • Here is the syntax of the CBRT() function.
grunt> CBRT(expression)


  • Assume that there is a file named wikitechy_math.txt in the HDFSdirectory /pig_data/. This file contains integer and floating point values as shown below.


  • And, we have loaded this file into Pig with a relation named wikitechy_math_data as shown below.
grunt> wikitechy_math_data = LOAD 'hdfs://localhost:9000/pig_data/wikitechy_math.txt' USING PigStorage(',')
   as (data:float);
  • Let us now calculate the cube root values of the contents of the wikitechy_math.txt file using CBRT() function as shown below.
grunt> cbrt_data = foreach wikitechy_math_data generate (data), CBRT(data);
  • The above statement stores the result in the relation named cbrt_data. Verify the contents of the relation using the Dump operator as shown below.
grunt> Dump cbrt_data;

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