Hello, I am researching information about writing C-language-Functions for PostgreSQL. I came accross the slides of an OSCON 2004 tutorial of Joe Conway http://www.joeconway.com/tut_oscon_2004.pdf where he states: Version 0 Calling Convention • Deprecated • Has been since the 7.1 release. • Don't use it. Within the PostgreSQL-Documentation for 8.2, http://www.postgresql.org/docs/8.2/interactive/xfunc-c.html, still I find: """Using call conventions version 0, we can define c_overpaid as:""" That sound very tutorial-like; and so $I wonder: is those version 0 depreciated? Or ist there still value in learning it? Harald -- GHUM Harald Massa persuadere et programmare Harald Armin Massa Spielberger Straße 49 70435 Stuttgart 0173/9409607 fx 01212-5-13695179 - EuroPython 2008 will take place in Vilnius, Lithuania - Stay tuned! ---------------------------(end of broadcast)--------------------------- TIP 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq