SQL COPY syntax extension (was: Performance on inserts)
От | Hannu Krosing |
---|---|
Тема | SQL COPY syntax extension (was: Performance on inserts) |
Дата | |
Msg-id | 39AA395F.3E400673@tm.ee обсуждение исходный текст |
Ответ на | Re: Performance on inserts (Jules Bean <jules@jellybean.co.uk>) |
Список | pgsql-hackers |
Oliver Teuber wrote: > > On Sat, Aug 26, 2000 at 12:14:06PM +0100, Matthew Kirkwood wrote: > > On Sat, 26 Aug 2000, Jules Bean wrote: > > > > > Is there any simple way for Pg to combine inserts into one bulk? > > > Specifically, their effect on the index files. It has always seemed > > > to me to be one of the (many) glaring flaws in SQL that the INSERT > > > statement only takes one row at a time. > > > > One of MySQL's little syntax abuses allows: > > > > INSERT INTO tab (col1, ..) VALUES (val1, ..), (val2, ..); > > > > which is nice for avoiding database round trips. It's one > > of the reasons that mysql can do a bulk import so quickly. > > > copy seems to be very fast ... i dont know why all people use > multiple inserts ??? just use copy ... > Could copy be extended to support a more SQL-friendly syntax. like COPY tablename FROM VALUES((x1,y1,z1),(x2,y2,z2),(x3,y3,z3) ); The main reason I have not used COPY very much is it's non-SQL syntax for field values. Extending the COPY command would probably be much easier than speeding up INSERTS. ------------- Hannu
В списке pgsql-hackers по дате отправления: