Recent changes to bugs

Socket connection under Unix with FreePascal not working

Anonymous — Sat, 04 Aug 2007 14:20:59 -0000

First of all I was surprised that Direct SQL compiled flawlessly in FreePascal! Then I noticed I couldn't connect to my server and traced the problem back to some obviously unfinished line of code.

Problem 1:
The problem you have is that 'errno' is defined in the ISO standard as an assignable l-value and can be either a MACRO or a variable. This is a bad starting point for any Pascal Linker.

Solution 1:
Looking through the web I found that the GNU implementation of the ISO standard exports the function '__errno_location()' which returns the address of that int. So I deleted your global variable 'errno: Integer' and added "function errno: PInteger; cdecl; external 'libc.so.6' name '__errno_location';". In addition all the references to "errno" have to be changed to "errno^".

Problem 2:
connect still didn't seem to work and if errno^ returned reliable values it was due to an 'invalid parameter'.

Solution 2:
As the socket wasn't -1 and the address length was 16 it had to be the address itself. Looking at the declaration of connect I got a bit nervous about the "const" keyword cause it can be used by the compiler to transfer values in registers while we explicitly need a pointer here. So I changed this to "var" and it seems to do the trick.

Thank you for this great library and making it as compatible as it can be. I'm looking forward to the next release.

Marco

MySQL 4.1.7 Bugs

GreenPirate — Wed, 01 Dec 2004 19:47:25 -0000

Hi,

DirectSQL causes lots of problems when trying to
connect to a stable MySQL 4.1.7 server. It seems it
does not obtain the field- and tablenames correctly from
the MySQL server.

Integer Overflow

Anonymous — Tue, 09 Dec 2003 13:56:29 -0000

I get an Integer Overflow Error in the line
nr2:=nr2+((nr2 shl 8) xor nr);
in function hashPassword
in Module uMysqlClient.pas.
The Error happens not always but often.

What can I do ?

Possible Unneeded Data Fetch on Close ??

Anonymous — Fri, 18 Jul 2003 10:52:13 -0000

I think that on this procedure

destructor TMysqlResult.destroy;

unit uMysqlClient.pas

destructor TMysqlResult.destroy;
....
while true do
begin //clear the buffer
pkt_len:=fhandle.fnet.net_safe_read;
if (pkt_len = packet_error) then break;
if (pkt_len = 1) and (pchar(fhandle.fnet.read_pos)[0]
= #254) then break;
end;
....

this loop is not needed and it causes the component to
fetch ALL records, while the only thing we really want to
do is close the dataset.

Connection Duplicates

E-Razor — Wed, 09 Apr 2003 00:27:43 -0000

I don't know if it is a bug or not.

When I connect to the database (mysqlproc demo
program) when the connection is successfull if I press
the button multiple times, it will create multiple threads
without disconnect the previous one.

Another question, is it possible to help on the project ?

possible memory leak

Anonymous — Mon, 03 Feb 2003 17:04:38 -0000

in net_real_write in the file uMysqlNet.pas, strDispose is
not always called on pac, which causes a memory leak.

I worked around it by adding a strdispose(pac); to the
end of the procedure

query error

Anonymous — Wed, 28 Aug 2002 13:17:00 -0000

Very strange behavior.
I have long query (UPDATE CATDATA SET MYBLOB =
0x176128f123f3f12f123ff12312..... WHERE ID=1 )

When I post it to remote server it gives error if query
sent was > 16k. With libmysql everything ok.

Anton

mysql_query hangs

Cristian Nicola — Wed, 19 Sep 2001 08:04:51 -0000

Apparently a query like:
'update table column="1" where id=5' does hang .. need
to check.

Send file to server + compression = AV

Cristian Nicola — Wed, 19 Sep 2001 08:03:55 -0000

Need to find a fix in this case

Send file to server has problems

Cristian Nicola — Wed, 19 Sep 2001 08:03:24 -0000

I will check it today and definatelly fix it.