def delta(graph, cursor, mongoDB):
extractor = TableDataExtractor()
for table in graph:
sqlKeys = extractor.getPrimaryKeyValues(cursor, table)
#print "SQL Keys: " + str(sqlKeys)
mongoKeys = [str(entry[table.primaryKey[0]]) for entry in mongoDB[table.tableName].find()]
#print "Mongo Keys: " + str(mongoKeys)
sqlSet = set(sqlKeys)
mongoSet = set(mongoKeys)
newKeys = sqlSet.difference(mongoSet)
insertNewKeys(mongoDB, cursor, extractor, newKeys, table, table.primaryKey[0])
deletedKeys = mongoSet.difference(sqlSet)
deleteRemovedKeys(mongoDB, deletedKeys, table.tableName, table.primaryKey[0])
