Hello=2E
Firstable, thanks for your help, this mailing list is very great because
it's rare to find other information elsewhere=2E

Then, we solved the problem of delete/free on a Row=2E
(Remember the following example at the end of the mail=2E)

In fact, the library mysql++ was compiled with gcc 3=2E4, but all the=
source
code and other librairies were compiled in gcc 4=2E0, but we noticed this=
kind
of incompatibility only yesterday=2E

So we compiled mysql++ with gcc4=2E0 and it's ok=2E

Stupid thing, but not easy to find out=2E

Nicolas

-----Message d'origine-----
De=A0: Rieu Nicolas [mailto:nicolas=2Erieu@capgemini=2Ecom]=20
Envoy=E9=A0: jeudi 20 juillet 2006 19:05
=C0=A0: plusplus@lists=2Emysql=2Ecom
Objet=A0: RE: Problem of memory with Row ???


Hello Warren,
I tried to launch simple1 like this:
=2E=2E=2E/simple1 [parameters]

It's ok

Well I copied the source code from simple1=2Ecpp to my program like this:

// Retrieve the sample stock table set up by resetdb
mysqlpp::Query query =3D con=2Equery();
query << "select * from stock";
mysqlpp::Result res =3D query=2Estore();

// Display results
if (res) {
// Display header
cout=2Esetf(ios::left);
cout << setw(21) << "Item" <<
setw(10) << "Num" <<
setw(10) << "Weight" <<
setw(10) << "Price" <<
"Date" << endl << endl;

// Get each row in result set, and print its contents
char buf[100];
cout<<"a:"<<endl;
mysqlpp::Row row;
cout<<"b:"<<endl;
mysqlpp::Row::size_type i;
cout<<"c:"<<endl;
for (i =3D 0; row =3D res=2Eat(i); ++i) {
cout<<"err:"<<i<<endl;
cout << setw(20) <<
row["item"] << ' ' <<
setw(9) << row["num"] << ' ' <<
setw(9) << row["weight"] << ' ' <<
setw(9) << row["price"] << ' ' <<
setw(9) << row["sdate"] <<
endl;
cout<<"bob:"<<i<<endl;
}
}
else {
cerr << "Failed to get stock table: " << query=2Eerror() <<
endl;
return 1;
}


And I've got the same problem:=20
it crashes at the line " for (i =3D 0; row =3D res=2Eat(i); ++i) {"

valgrind tells me that:

Invalid free() / delete / delete[]
operator delete(void*) (vg_replace_malloc=2Ec:155)
mysqlpp::Row::~Row() new_allocator=2Eh:86)

the features of my build environment:
compiler: gcc version 4=2E0=2E2 20051125 (Red Hat 4=2E0=2E2-8)
OS: Red Hat Enterprise Linux ES release 4 (Nahant Update 2) Kernel
2=2E6=2E9-34=2E0=2E1=2EELsmp on an i686
MySQL++: 2=2E1=2E1
Mysql 5=2E0

Do you want more information ?

Nicolas

-----Message d'origine-----
De=A0: Warren Young [mailto:mysqlpp@etr-usa=2Ecom]=20
Envoy=E9=A0: mardi 18 juillet 2006 16:19
=C0=A0: MySQL++ Mailing List
Objet=A0: Re: Problem of memory with Row ???

Rieu Nicolas wrote:
Your code is almost identical to the simple2 example=2E Does that run=20
successfully?

If so, try making the minimum necessary changes to simple2 to make it=20
access your database instead of the sample database=2E If it still works,=
=20
then something is wrong with your build environment=2E Otherwise, it=20
suggests that there's something in your data set that MySQL++ can't cope=20
with; provide the schema of the table so we can diagnose it=2E

If simple2 also crashes, we'll need details of your build environment to=20
make any guesses=2E Compiler, OS, MySQL++ and MySQL versions, etc=2E

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and
is the property of the Capgemini Group=2E It is intended only for the=
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to whom it is addressed=2E If you are not the intended recipient, you are=
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and is the property of the Capgemini Group=2E It is intended only for the=
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you are not authorized to read, print, retain, copy, disseminate, =
distribute, or use this message or any part thereof=2E If you receive this=
message in error, please notify the sender immediately and delete all =
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