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Hi...
find the following details about the bug and please
send a response/bugfix.
------------------------------
Testing platform details...
Postgress
Version :
7.0.3
Platform :
Linux 6.2 on a Compaq Server
System
Memory :
1 GB
Disk
Space :
6 GB
library :
libpq++
Bug description...
1 - Try to create a PgConnection object or a PgDatabase
object on the heap using new
PgDatabase *conn = new PgDatabase ("user=xyz
dbname=abc");
or
PgConnection *conn = new PgConnection ("user=xyz
dbname=abc");
Execute the program after
compiling. When the above is executed you get the following
error:
Segmentation fault (core
dumped)
Note: If you create on the
stack using
PgDatabase conn = PgDatabase ("user=xyz
dbname=abc");
or
PgConnection conn = PgConnection ("user=xyz
dbname=abc");
then, it works.
2. - No default constructor
available for connection object
A call like
PgDatabase conn =
PgConnection;
will not compile and gives an error message
saying...
PgDatabase::PgDatabase() is
protected.
Therefore, If
one wants to create an array of connections, (for ex: to implement a connection
pool),
a
call like PgConnection conns[CONNECTIONS]; won;t
work.
To overcome the above 2 problems, we tried creating
a class by inheriting from pgDatabase, which provides a
default constructor.
ex:
class mydb : public
PgDatabase {
public:
mydb() : PgDatabase() { }
mydb(string&
constr) : PgDtabase (constr.c_str()) { }
};
Then the function calls:
mydb* con1 = new
mydb();
mydb* con2 = new
mydb("user=xyz dbname=abc");
are working properly...
but...
then the calls to free the
memory give segmentation fault.
delete
con1;
delete
con2;
Please kindly, check the above and let me know that
my analysis is correct or wrong.
In previous version of postgres i.e. 6.x,
this problem does not exist. Also find
herewith attached some sample code, we used
for testing...
sincerely...
Ravindranath M
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