Re: [BUGS] Bug #708: PgTransaction class is broken since 7.2 - Mailing list pgsql-interfaces

Piotr Klaban wrote:
> > > PgTransaction class is broken since 7.2
>
> On Thu, Jul 11, 2002 at 12:41:24PM -0400, Bruce Momjian wrote:
> >
> > OK, would you send us a correcting patch?  Thanks.
>
> Thank you for a quick reply.
> Sure. If you do not mind, I will enclosed it with this letter
> directly to you.

This person would like the following patch applied to libpq++ to fix a
problem with pg2xbase.  I have attached the bug report and his proposed
patch of removing 'protected' from two methods:

    -protected:
       ExecStatusType BeginTransaction();
       ExecStatusType EndTransaction();

It this acceptable to people?

--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026
sql-bugs@postgresql.org wrote:
Piotr Klaban (makler@man.torun.pl) reports a bug with a severity of 2
The lower the number the more severe it is.

Short Description
PgTransaction class is broken since 7.2

Long Description
Hi,

You have introduced the patch
  http://www.geocrawler.com/archives/3/105/2001/2/0/5248369/
that broke my pg2xbase C++ utility, because
I can not COMMIT the transaction. Before the patch
it works exactly as it is described in the pgtransdb.h file:

// This is the database access class that keeps an open
// transaction block during its lifetime.  The block is ENDed when
// the object is destroyed.

But it is not true now. There is a private variable called
pgCommitted that is set to false in protected method BeginTransaction()
When I delete PgTransaction object - transaction is ABORTed.
I can not use EndTransaction() protected method in my C++ file
(gcc 3.0.3 complains).

Maybe both methods should be public.
Now I use PgDatabase object with two query calls BEGIN ... END
it is safer.

--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026

--- postgresql-7.2.1/src/interfaces/libpq++/pgtransdb.h.old    Thu Jul 12 00:12:43 2001
+++ postgresql-7.2.1/src/interfaces/libpq++/pgtransdb.h    Fri Jul 12 11:53:50 2002
@@ -32,8 +32,9 @@
 //
 // ****************************************************************
 // This is the database access class that keeps an open
-// transaction block during its lifetime.  The block is ENDed when
-// the object is destroyed.
+// transaction block during its lifetime.  The block is ABORTed when
+// the object is destroyed, unless you call EndTransaction() method
+// before destruction of the object.
 class DLLIMPORT PgTransaction : public PgDatabase {
 public:
   explicit PgTransaction(const char* conninfo);    // use reasonable & environment defaults
@@ -41,7 +42,6 @@
   // explicit PgTransaction(const PgConnection&);
   ~PgTransaction();    // close connection and clean up

-protected:
   ExecStatusType BeginTransaction();
   ExecStatusType EndTransaction();