Обсуждение: function accepting a row
Hi, I'am trying to create a function in plpgsql that will accept a parameter of type rowtype. Here is a little test script I wrote: http://62.121.81.182/pub/test_func.sql It works on Postgres 8.03, but fails on 7.4, where I actually want it to work. What am I doing wrong? Error message says that there is no such column "row", but it doesn't help me much understanding the problem. Thanks for help, Tomek Grzejszczyk
On Wed, Aug 10, 2005 at 08:01:13PM +0200, Tomek Grzejszczyk wrote: > I'am trying to create a function in plpgsql that will accept a parameter > of type rowtype. Here is a little test script I wrote: > http://62.121.81.182/pub/test_func.sql > > It works on Postgres 8.03, but fails on 7.4, where I actually want it to > work. What am I doing wrong? Wanting it to work isn't going to change the fact that 8.0 has better support for composite types than previous versions. See the 8.0 Release Notes: http://www.postgresql.org/docs/8.0/static/release-8-0.html One of the items under "Server-Side Language Changes" is: * More support for composite types (row and record variables) in PL/pgSQL For example, it now works to pass a rowtype variable to another function as a single variable. If you're using a version older than 8.0 then you'll have to work within its limitations. -- Michael Fuhr
Od: Michael Fuhr <mike@fuhr.org> .. > * More support for composite types (row and record variables) in > PL/pgSQL > > For example, it now works to pass a rowtype variable to another > function as a single variable. > > If you're using a version older than 8.0 then you'll have to work > within its limitations. > Thanks for the answer, I tried to follow #37.1.2 from: http://www.postgresql.org/docs/7.4/interactive/plpgsql.html where one can read: "Functions written in PL/pgSQL can accept as arguments any scalar or array data type supported by the server, and they can return a result of any of these types. They can also accept or return any composite type (row type) specified by name." So is this part of documentation non correct or is my way of calling a function accepting a rowtype is not correct? Tomek Grzejszczyk
On Thu, Aug 11, 2005 at 12:20:17PM +0200, tgrzej wrote: > I tried to follow #37.1.2 from: > http://www.postgresql.org/docs/7.4/interactive/plpgsql.html > > where one can read: > "Functions written in PL/pgSQL can accept as arguments any scalar or > array data type supported by the server, and they can return a result > of any of these types. They can also accept or return any composite > type (row type) specified by name." > > So is this part of documentation non correct or is my way of calling a > function accepting a rowtype is not correct? PL/pgSQL functions can *accept* these types of arguments, but in versions earlier than 8.0 they have trouble *passing* such arguments to another function. The documentation should probably be more clear about that. -- Michael Fuhr
Michael Fuhr napisal(a): > > PL/pgSQL functions can *accept* these types of arguments, but in > versions earlier than 8.0 they have trouble *passing* such arguments > to another function. Now I get it. Thank you. Tomek Grzejszczyk