On Thu, 18 Oct 2007 11:24:24 -0400 "Billow Gao" <[EMAIL PROTECTED]> wrote: > I can write the network program. > But I am not 100% sure whether I can add the c-language function ( > http://www.postgresql.org/docs/8.2/interactive/xfunc-c.html) > to PostgreSQL. The function will be dynamic loaded by PostgreSQL. > I want to know whether there are any limitation on the function I wrote. > > for example: > If I want to write a function: > > PG_FUNCTION_INFO_V1(c_talktoremoteudp); > > > And use it in PostgreSQL like: > > ========================================= > SELECT name, c_talktoremoteudp > > (emp, 1500) AS overpaid > FROM emp > WHERE name = 'Bill' OR name = 'Sam'; > > ========================================= > The function c_talktoremoteudp will: > 1. send udp data to remote udp server > 2. monitor an udp port and wait for the reply > 3. return the data to the select query.
I am confused. The dynamic function resides in the server. The query runs in the server. Where is the "remoteness" in any of this? Are you saying that there is a second server that is not PostgreSQL that uses UDP that you want to communicate with and merge info into the PostgreSQL server from? -- D'Arcy J.M. Cain <[EMAIL PROTECTED]> | Democracy is three wolves http://www.druid.net/darcy/ | and a sheep voting on +1 416 425 1212 (DoD#0082) (eNTP) | what's for dinner. ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
