Custom report linked with column alais

Custom report linked with column alais



I am attempting to generate a report, that will display the column names , this is successfully however i also need to add the Reason for test request into the report however i am unable to located this 

Please an you confirm how to add column in so that we can report on the as well (second screen shot)

COLUMNALIASESID TABLENAME COLUMNNAME ALIASNAME     
29514 ServiceReq_1501 UDF_CHAR3 Reason for Test Request       


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