Обсуждение: Document the limit on the number of parameters
The following documentation comment has been logged on the website: Page: https://www.postgresql.org/docs/10/static/sql-prepare.html Description: The backend protocol limits the number of parameters that can be passed for a prepared statement to 32767 (2 byte signed integer). As that is something that is independent of the client library, I think this should be documented in the user facing manual for the Postgres server somewhere. I did not find anything in the chapter about PREPARE https://www.postgresql.org/docs/current/static/sql-prepare.html or about the backend protocol: https://www.postgresql.org/docs/current/static/protocol.html nor on the FAQ page: https://wiki.postgresql.org/wiki/FAQ
On Tue, Jul 17, 2018 at 01:25:08PM +0000, PG Doc comments form wrote: > The following documentation comment has been logged on the website: > > Page: https://www.postgresql.org/docs/10/static/sql-prepare.html > Description: > > The backend protocol limits the number of parameters that can be passed for > a prepared statement to 32767 (2 byte signed integer). > > As that is something that is independent of the client library, I think this > should be documented in the user facing manual for the Postgres server > somewhere. > > I did not find anything in the chapter about PREPARE > https://www.postgresql.org/docs/current/static/sql-prepare.html or about the > backend protocol: > https://www.postgresql.org/docs/current/static/protocol.html nor on the FAQ > page: https://wiki.postgresql.org/wiki/FAQ Uh, is this something people will care about? -- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + As you are, so once was I. As I am, so you will be. + + Ancient Roman grave inscription +
Greetings, * Bruce Momjian (bruce@momjian.us) wrote: > On Tue, Jul 17, 2018 at 01:25:08PM +0000, PG Doc comments form wrote: > > The following documentation comment has been logged on the website: > > > > Page: https://www.postgresql.org/docs/10/static/sql-prepare.html > > Description: > > > > The backend protocol limits the number of parameters that can be passed for > > a prepared statement to 32767 (2 byte signed integer). > > > > As that is something that is independent of the client library, I think this > > should be documented in the user facing manual for the Postgres server > > somewhere. > > > > I did not find anything in the chapter about PREPARE > > https://www.postgresql.org/docs/current/static/sql-prepare.html or about the > > backend protocol: > > https://www.postgresql.org/docs/current/static/protocol.html nor on the FAQ > > page: https://wiki.postgresql.org/wiki/FAQ > > Uh, is this something people will care about? Seems like a limitation in the backend protocol should probably be documented in the backend protocol section of the docs.. Thanks! Stephen
Вложения
Stephen Frost <sfrost@snowman.net> writes:
> * Bruce Momjian (bruce@momjian.us) wrote:
>> On Tue, Jul 17, 2018 at 01:25:08PM +0000, PG Doc comments form wrote:
>>> The backend protocol limits the number of parameters that can be passed for
>>> a prepared statement to 32767 (2 byte signed integer).
>> Uh, is this something people will care about?
> Seems like a limitation in the backend protocol should probably be
> documented in the backend protocol section of the docs..
It is: the definition of the Bind message format says that the parameter
count is an int16.
The question is whether this deserves to be cross-referenced from
elsewhere. I agree with Bruce that it seems unlikely to be helpful.
regards, tom lane
Greetings Tom, * Tom Lane (tgl@sss.pgh.pa.us) wrote: > Stephen Frost <sfrost@snowman.net> writes: > > * Bruce Momjian (bruce@momjian.us) wrote: > >> On Tue, Jul 17, 2018 at 01:25:08PM +0000, PG Doc comments form wrote: > >>> The backend protocol limits the number of parameters that can be passed for > >>> a prepared statement to 32767 (2 byte signed integer). > > >> Uh, is this something people will care about? > > > Seems like a limitation in the backend protocol should probably be > > documented in the backend protocol section of the docs.. > > It is: the definition of the Bind message format says that the parameter > count is an int16. > > The question is whether this deserves to be cross-referenced from > elsewhere. I agree with Bruce that it seems unlikely to be helpful. Ah, I read the original poster as saying that it wasn't in the protocol docs. If it's there already then I agree, that's sufficient. Thanks! Stephen