Programming Pig

Pig Latin comes with a number of built-in functions (the eval, load/store, math, string, bag, and tuple functions) and a number of scalar and complex data types. Additionally, Pig allows function and data-type extension by means of UDFs and dynamic invocation of Java methods.

Pig data types

Pig supports the following scalar data types:

• int: a signed 32-bit integer

• long: a signed 64-bit integer

• float: a 32-bit floating point

• double: a 64-bit floating point

• chararray: a character array (string) in Unicode UTF-8 format

• bytearray: a byte array (blob)

• boolean: a boolean

• datetime: a datetime

• biginteger: a Java BigInteger

• bigdecimal: a Java BigDecimal

Pig supports the following complex data types:

• map: an associative array enclosed by [], with the key and value separated by #, and items separated by ,

• tuple: an ordered list of data, where elements can be of any scalar or complex type enclosed by (), with items separated by ,

• bag: an unordered collection of tuples enclosed by {} and...