ksherlock@xxxxxxxxx wrote: > Hello, > > The +4 is for the overhead of a varchar field. > > Using ALTER TABLE <table> ALTER <field> TYPE VARCHAR(<newsize>) to > change the size requires scanning the entire table. For large tables, > this will be much slower than the pg_attribute query. Both will get > the job done. > Thanks. Am I correct in assuming that this scanning of the entire table is done when I use the 'ALTER TABLE' command and not something I must do after it's done? Thanks again for explaining it. I was thinking that the +4 had something to do with overhead of some sort, but wanted to know for sure. Andy
