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Description of problem:
Consider the following association (i've removed the table mappings for
simplification).

association {
    composite AtoZ[0..1] atoz;
    component AtoZProvider[0..n] atozProviders;
    Integer[0..1] sortKey;
}

As a preventative measure against 'Lutterkorts Axiom of Lax Data Models'
striking we need to ensure that for each 'AtoZ' object, the sortKeys for the
associated atozProviders are unique. Thus I add:

unique(atoz, sortKey) 

to the association. This triggers an exception when loading PDL:

    [java] Exception in thread "main" java.lang.Error:
/var/ccm-devel/dev/dan/aplaws-rickshaw/atoz/pdl/com/arsdigita/london/atoz/AtoZProvider.pdl:
Encountered "(" at line 44, column 12.
     [java] Was expecting one of:
     [java]     "composite" ...
     [java]     "component" ...
     [java]     <ID> ...
     [java]     
     [java]     at com.redhat.persistence.pdl.PDL.load(PDL.java:72)


Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. Define an association similar to the above example
2. Run generate-sql

    

Additional info: