Andy Boothe created PIG-4126:
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Summary: No syntax to create single-column tuples
Key: PIG-4126
URL: https://issues.apache.org/jira/browse/PIG-4126
Project: Pig
Issue Type: Bug
Reporter: Andy Boothe
There is currently no syntax to create a single-column tuple. For example, none
of these work:
x = LOAD 'data.json' USING JsonLoader('a:chararray, b:chararray') AS
(a:chararray, b:chararray);
# The goal is to create a relation containing a tuple with a single column
# For example: tpl: (value: chararray)
# Creates a relation with a single column "a" that is a chararray
a = foreach x generate (a) as (a: chararray);
b = foreach x generate a as (a: chararray);
c = foreach x generate a as a: chararray;
# Python-style tuple syntax is a syntax error
d = foreach x generate (a,) as (a: chararray);
# Types are incompatible
e = foreach x generate (a) as tuple(a: chararray)
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