Post by Admin on Mar 15, 2014 19:15:58 GMT
•Apache pig is one of the components of HADOOP which is an abstract layer(high level procedural language) on top of HADOOP and map reduce platform.
•Pig is also known as data flow language (or) transformation language.
•Pig was initially introduced at yahoo laboratories at very first time in order to address their adios request.
•Pig language was officially opted by apache in the year 2006 from there onwards are used to pig language called apache pig.
•The language to express pig language transformation is known as pig latin.
•As we are dealing with multiple transformation and data flow will be through the transformations. We can call pig is a transformation language (or) data flow language.
•Pig is a simple language that executes statements.
•A statement is an operation that takes input (such as bag represents a set of topless) and emits another bag as it’s output.
•Pig latten are not case-sensitive. UDF names are case sensitive.
Ex:-count-> count ex:-count->count