Parameter substitution ($PARAMETER) should not be performed in comments
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Key: PIG-598
URL: https://issues.apache.org/jira/browse/PIG-598
Project: Pig
Issue Type: Bug
Components: impl
Affects Versions: types_branch
Reporter: David Ciemiewicz
Priority: Minor
Compiling the following code example will generate an error that
$NOT_A_PARAMETER is an Undefined Parameter.
This is problematic as sometimes you want to comment out parts of your code,
including parameters so that you don't have to define them.
This I think it would be really good if parameter substitution was not
performed in comments.
{code}
-- $NOT_A_PARAMETER
{code}
{code}
-bash-3.00$ pig -exectype local -latest comment.pig
USING: /grid/0/gs/pig/current
java.lang.RuntimeException: Undefined parameter : NOT_A_PARAMETER
at
org.apache.pig.tools.parameters.PreprocessorContext.substitute(PreprocessorContext.java:221)
at
org.apache.pig.tools.parameters.ParameterSubstitutionPreprocessor.parsePigFile(ParameterSubstitutionPreprocessor.java:106)
at
org.apache.pig.tools.parameters.ParameterSubstitutionPreprocessor.genSubstitutedFile(ParameterSubstitutionPreprocessor.java:86)
at org.apache.pig.Main.runParamPreprocessor(Main.java:394)
at org.apache.pig.Main.main(Main.java:296)
{code}
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