This function is used to covert the first character of the given string into lowercase.
Following is the syntax of the LCFIRST() function.
Assume that there is a file named emp.txt in the HDFS directory /pig_data/ as shown below. This file contains the employee details such as id, name, age, and city.
001,Robin,22,newyork 002,BOB,23,Kolkata 003,Maya,23,Tokyo 004,Sara,25,London 005,David,23,Bhuwaneshwar 006,Maggy,22,Chennai 007,Robert,22,newyork 008,Syam,23,Kolkata 009,Mary,25,Tokyo 010,Saran,25,London 011,Stacy,25,Bhuwaneshwar 012,Kelly,22,Chennai
And, we have loaded this file into Pig with a relation named emp_data as shown below.
grunt> emp_data = LOAD 'hdfs://localhost:9000/pig_data/emp.txt' USING PigStorage(',') as (id:int, name:chararray, age:int, city:chararray);
Given below is an example of the LCFIRST() function. In this example, we have converted all the first letters of the names of the employees to lowercase.
grunt> Lcfirst_data = FOREACH emp_data GENERATE (id,name), LCFIRST(name);
The result of the statement will be stored in the relation named Lcfirst_data. Verify the content of the relation Lcfirst_data, using the Dump operator as shown below.
grunt> Dump Lcfirst_data; ((1,Robin),robin) ((2,BOB),bob) ((3,Maya),maya) ((4,Sara),sara) ((5,David),david) ((6,Maggy),maggy) ((7,Robert),robert) ((8,Syam),syam) ((9,Mary),mary) ((10,Saran),saran) ((11,Stacy),stacy) ((12,Kelly),kelly)