Some quotes come from the SO post, since it contains more detail.
Answering here instead of there because I do not yet have "the answer".
On 6/21/2011 4:12 PM, Benjamin Johnson wrote:
> host_guid value...unsigned __int64,
Why are you calling a 64-bit value a GUID? GUIDs are 128 bits.
> a win32 c++ app
Do you mean a Win64 app?
Or is it the case that you are building 32-bit binaries and are relying
on MS's compiler to give you non-native 64-bit integer support?
> if I dump the mysql database, move it over to windows 7 and run the
> same binary that reads the database, it works great.
I don't quite see how that can be the case with a statically-compiled,
statically-typed language like C++. It is true that MySQL++ essentially
adds a dynamic typing system to your program, but once you compile code
like you show, the types get fixed in stone.
The only guess I have is that the C++ RTL is different, and you're
linking against a copy MS ships with the OS, and it is different between
the two OSes. The way to test this is to statically link your program.
(/MT, rather than /MD.)
> I'm including the code that reproduces it.
Thanks, but I for one do not have a Windows 2008 server sitting around.
> mysqlpp::Query query = conn.query();
> query<< "select 15216036968564760613 as host_guid";
Do you get the same behavior if you select the data from an actual
database, so that the code has type info from the MySQL server to work
with? I tried it on a 64-bit Linux box, and it works fine here:
--- examples/stock.h (revision 2692)
+++ examples/stock.h (working copy)
@@ -39,7 +39,7 @@
1, 6, // The meaning of these values is covered in the user manual
- mysqlpp::sql_bigint, num,
+ mysqlpp::sql_bigint_unsigned, num,
mysqlpp::sql_date, sDate, // SSQLS isn't case-sensitive!
--- examples/resetdb.cpp (revision 2692)
+++ examples/resetdb.cpp (working copy)
@@ -135,7 +135,7 @@
"CREATE TABLE stock (" <<
" item CHAR(30) NOT NULL, " <<
- " num BIGINT NOT NULL, " <<
+ " num BIGINT UNSIGNED NOT NULL, " <<
" weight DOUBLE NOT NULL, " <<
" price DECIMAL(6,2) NULL, " << // NaN & inf. == NULL
" sdate DATE NOT NULL, " <<
@@ -165,7 +165,10 @@
query.execute("Pickle Relish", 87, 1.5, 1.75, "1998-09-04");
query.execute("Hot Mustard", 73, .95, .97, "1998-05-25",
"good American yellow mustard, not that European stuff");
- query.execute("Hotdog Buns", 65, 1.1, 1.1, "1998-04-23");
+ query.execute("Hotdog Buns",
+ 1.1, 1.1, "1998-04-23");
+ cout << "SIZEOF: " << sizeof(mysqlpp::sql_bigint_unsigned) <<
// Test that above did what we wanted.
cout << "inserted " << con.count_rows("stock") << " rows."