Обсуждение: Sequences...
I had a asked this question earlier and did not get a response, so here it is again. When implementing an "autoincrementing" field in several tables, is common practice to create sequence for each table, or is it OK to use just one sequence? I know right off the bat that if there was a requirement that there be no holes in the key for a particualr table that one sequence over multiple tables (like in check register) would not do, but if this requirment is not there, would having one sequnence for all (provided your projected number of total records in all the tables is less than 4 billion) tables be OK? Thanks...james
On Mon, 27 Jul 1998, James Olin Oden wrote: > > I had a asked this question earlier and did not get a response, so here > it is again. > > When implementing an "autoincrementing" field in several tables, is > common practice to create sequence for each table, or is it OK to use > just one sequence? I know right off the bat that if there was a > requirement that there be no holes in the key for a particualr table > that one sequence over multiple tables (like in check register) would > not do, but if this requirment is not there, would having one sequnence > for all (provided your projected number of total records in all the > tables is less than 4 billion) tables be OK? I don't see any problem there. -- Peter T Mount peter@retep.org.uk or petermount@earthling.net Main Homepage: http://www.retep.org.uk PostgreSQL JDBC Faq: http://www.retep.org.uk/postgres