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libpq++ and arrays?

From: "Alf Lewerken" <lewerken(at)mail(dot)bicos(dot)de>
To: <pgsql-interfaces(at)postgreSQL(dot)org>
Subject: libpq++ and arrays?
Date: 1999-05-14 21:07:56
Message-ID: 000f01be9e4d$d7cc1860$ (view raw, whole thread or download thread mbox)
Lists: pgsql-interfaces
Hi all

I have the following problem:
I'm using libpq++ to acces a Postgres-Database.

The table was created in psql using:
create table test values (nr int4, some_value float4[]);

in my C++-program a piece of code is:

  char *nr_string, *some_other_string;

  PgDatabase test(pgenv, "test");
  test.Exec("declare c cursor for select * from test");
  for(int i=0; i<test.Tuples();i++)
     nr_string = test.GetValue(i, "nr");  // obtaining the value in 'nr' is easy

     some_other_string = test.GetValue(i, "some_value[1]"); // this gives an error
     // PQgetvalue: ERROR! field number -1 is out of range
     // so how do I obtain values in some_value[1], some_value[2] .... ?

any help would be appreciated.


Alf Lewerken


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