Re: Returning multiple result sets
От | Bruce Momjian |
---|---|
Тема | Re: Returning multiple result sets |
Дата | |
Msg-id | 200511232022.jANKMia21318@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Re: Returning multiple result sets (Tom Lane <tgl@sss.pgh.pa.us>) |
Список | pgsql-hackers |
Tom Lane wrote: > Martijn van Oosterhout <kleptog@svana.org> writes: > > libpq supports it just fine. You do a PQsendQuery() and then as many > > PQgetResult()s as it takes to get back the results. This worked for a > > while AFAIK. > > That only works if the caller is prepared to read each result serially, > and not (say) a row at a time in parallel. There are a bunch of > ease-of-use problems as well, such as knowing which resultset is which, > coping with errors detected after the first resultset(s) are sent, etc. > > A more realistic way of dealing with multiple resultsets is to deliver > them as named cursor references and allow the client to FETCH > reasonable-sized chunks. We can sort of handle this today, but it's > notationally painful at both the stored-procedure and client ends. Is there a TODO here? -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 359-1001+ If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania19073
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