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Benefits The benefit of implementing views with the rule system is , that the optimizer has all the information about which tables have to be scanned plus the relationships between these tables plus the restrictive qualifications from the views plus the qualifications from the original query in one single parsetree . The relationships we have an opportunity to forge will benefit our local communities , our nation , our children , our grandchildren and generations yet unborn . Metzger is an active member of the ASCE Met Section Younger Member Forum and has served as its president , secretary , and student outreach coordinator . The relationships between pg_am , pg_amop , pg_amproc , pg_operator and pg_opclass are particularly hard to understand and will be described in depth ( in the section on interfacing types and operators to indices ) after we have discussed basic extensions . Bachani is an active ASME member . If it is found and it does not yet have a commutator itself , then the commutator 's entry is updated to have the newly created operator as its commutator . Dugal is active in her church and in her community serving as a middle school math tutor and as a volunteer on renovation projects , and is an active member of ASME International and the Society of Women Engineers . Berens is the Mechanical / Integration Design Lead on the 2107-921 storage system .