parameter syntax in scripts, add support for ${VAR} (in addition to current
$VAR)
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Key: PIG-1244
URL: https://issues.apache.org/jira/browse/PIG-1244
Project: Pig
Issue Type: Improvement
Components: impl
Environment: all
Reporter: Alejandro Abdelnur
Fix For: 0.7.0
Currently parameter syntax in pig scripts is $VAR.
This complicates scripts as parameter-literal concatenation is not supported.
For example:
An occurrence of '$OUT_tmp' in a script resolves to a parameter 'OUT_tmp', it
would be desirable this to resolve to a contactenation of $OUT&_tmp
This can be solved by supporting parameter syntax ${VAR}, so the pig parser can
identify the end of the parameter name.
Adding support for ${VAR} syntax in addition of $VAR would maintain backwards
compatibility. Changing to syntax ${VAR} syntax will break backwards
compatibility.
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