Daniel I noticed several classes have "abstract" in description, but they are not really abstract (no pure virtual function) /// Factory is an abstract class for specific QueryPlugin Factories /// ColumnRef is an abstract value class holding a parsed single column ref We should either fix these comments, or turn them into real abstract class. Can you? Thanks, Jacek ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the QSERV-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1