Dump produces wrong results
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Key: PIG-1168
URL: https://issues.apache.org/jira/browse/PIG-1168
Project: Pig
Issue Type: Bug
Reporter: Ankur
For a map-only job, dump just re-executes every pig-latin statement from the
begininng assuming that they would produce same result. the assumption is not
valid if there are UDFs that are invoked. Consider the following script:-
raw = LOAD '$input' USING PigStorage() AS (text_string:chararray);
DUMP raw;
ccm = FOREACH raw GENERATE MyUDF(text_string);
DUMP ccm;
bug = FOREACH ccm GENERATE ccmObj;
DUMP bug;
The UDF MyUDF generates a tuple with one of the fields being a randomly
generated UUID. So even though one would expect relations 'ccm' and 'bug' to
contain identical data, they are different because of re-execution from the
begininng. This breaks the application logic.
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