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Apache Pig CONCAT Function

The Apache Pig CONCAT function is used to concatenate two or more expressions. The generated result of expression must have identical types. However, if any sub-expression is null, the generated expression is also null.

Example of CONCAT Function

In this example, we concatenate the first two fields of each tuple.

Steps to execute CONCAT Function

  • Create a text file in your local machine and insert the list of tuples.
Apache Pig CONCAT Function
  • Check the tuples inserted in the text files.
Apache Pig CONCAT Function
  • Upload the text files on HDFS in the specific directory.
  • Open the pig MapReduce run mode.
  • Load the file that contains the data.
  • Now, execute and verify the data.
Apache Pig CONCAT Function
  • Let's return the concatenation of two fields of each tuple.
Apache Pig CONCAT Function

Here, we got the desired output.

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