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Both the sustainability of consumption levels fuelled by the wealth effect of the speculative boom in the United States , and the excess production capacity generated , are now major sources of policy concern . Since all the remaining rangetable entries either have no rules in pg_rewrite or are n't referenced , it reaches the end of the rangetable . Kruse , an engineer at Merrick & Company in Aurora , Colorado , is responsible for site design that supports new buildings . On machines that meet the IEEE floating point standard , minus zero and plus zero are different values ( different bit patterns ) but they are defined to compare equal . In other words , if a row is returned by SELECT it does n't mean that this row really exists at the time it is returned ( i.e. sometime after the statement or transaction began ) nor that the row is protected from being deleted or updated by concurrent transactions before the current transaction does a commit or rollback . The test script will report any difference as a " failure " , but the difference might be due to small cross-system differences in error message wording , math library behavior , etc. Error messages can come from either the Postgres code or from the host platform system routines . The East Asia region has demonstrated that this is neither an unreasonable target nor an impossible dream . Luca Oriani , a senior engineer with Westinghouse Science & Technology in Pittsburgh , Pennsylvania , is a member of the international team working to develop a Generation IV advanced nuclear reactor design . You can frequently get away with using either eqsel or neqsel for operators that have very high or very low selectivity , even if they are n't really equality or inequality . In the other words , if a row is returned by SELECT it does n't mean that this row really exists at the time it is returned ( i.e. sometime after the statement or transaction began ) nor that the row is protected from deletion or update by concurrent transactions before the current transaction does a commit or rollback . In many respects , this shift arose from the difficult conjunctural challenges faced by many countries , both developed and developing , during the 1970s and 1980s . Note : Neither sequential scans nor nested-loop joins can be disabled completely ; the - fs and - fn options simply discourage the optimizer from using those plan types if it has any other alternative . So , if float equality were marked HASHES , a minus zero and a plus zero would probably not be matched up by a hash join , but they would be matched up by any other join process . Geoffrey Van Epps , P.E ., a civil engineer and Captain in the U.S. Army Corps of Engineers , provided electrical power expertise and services to support military operations and reconstruction in both Afghanistan and Iraq . Williams reengineers both manufacturing and business processes . In fact , logical equality is not good enough either ; the operator had better represent pure bitwise equality , because the hash function will be computed on the memory representation of the values regardless of what the bits mean . Corey Chinn is a mechanical engineer with Bechard & Associates in Poway , California . Damron has managed several projects including traffic impact studies , parking studies , master plans , major thoroughfare plans , and bicycle & pedestrian plans . You must specify the username for the Postgres superuser for the database system you are initializing , either with the - - username option or by default to the USER environment variable .